Muscle Chart Lower Extremity

Muscle Chart Lower Extremity is under construction, the goal is to include muscles that control the ankle and foot: last updated 1/21/18

Note: We have had multiple requests to complete the muscle charts. It is so rewarding to hear from so many.  We will focus our energy on completing this project in the first quarter of next year.  Thank you for your patients.

Gray's Anatomy image Anterior Thigh: Iliacus is highlighted in red, Psoas Major is highlighted in orange, Psoas minor is highlighted in pink, Pectineus is highligted in baby blue, Tensor Fascia Latae is highlighted in lavender, Adductor Brevis is not seen in the image, Adductor Longus is highlighted in a lighter shade of orange, Adductor Magnus is highlighted in purple, Rectus Femoris is highlighted in yellow, and  Sartorius is highlighted in lime green.

The muscle chart lower extremity is intentionally organized into groups of action that act upon a joint.  Click the name of the muscle and an image of the muscle will open in a new window.  Study the information and use the unlabeled image from the University of Michigan like a flash card to reinforce your learning.  Muscle fibers or cells are contractile and when voluntary or striated skeletal muscle is stimulated by the conscious desire to move around within our environment a contraction will takes place.  A signal is sent from our central nervous system to the muscle fiber and muscle groups responsible for moving the joint.  Actual locomotion of the body takes place at a joint.  A kinetic chain or series of movements via specific joints is necessary to produce full body movements. Take advantage of Get Body Smart by Ken Hub links for continued study especially to muscle group quizzes.

Home Page>Learn Muscles>Upper Arm Muscles>Muscle Chart Upper Extremity>Muscles Chart Lower Extremity

Flexors of the Femur at the Hip Joint
Antagonists are the Extensors of the Femur at the Hip Joint

Muscle Chart Lower Extremity
Click on the Name of the Muscle to see Muscle Image.  Click on the action to see a detailed discussion & group in motion


Muscle, Action, & Nerve

Origin

Insertion


Prime mover of Hip flexion is Iliopsoas which is made up of the Psoas Major and Iliacus

Action is flexion of femur at the hip joint and if thigh is flexed, flexion of the trunk at the hip joint.

Iliacus nerve to muscle and its spinal segment is femoral nerve roots (L2-L3).

Psoas nerve to muscle and its spinal segment is branches (ventral rami) of the lumbar plexes roots (L1-L3).

Psoas  O. on the lumbar vertebrae T12 – L5

Iliacus  O. on the inner surface of the ilium  (iliac fossa)



Psoas I. on lessor trochanter of the femur

Iliacus I. on lessor trochanter of the femur


Pectinius

Action flexion of the femur at the hip & assists adduction of the femur at the hip.

Nerve to muscle and its spinal segment is Femoral nerver roots (L2-L4).

O. on the anterior pubis

I. between lesser trochanter & linea aspera of posterior femur


Tensor Fasciae Latae

Action prevents collapse of extended knee in walking.  Assists in flexion (synergist), abduction & medial rotation of the femur at the hip.  Assists in extension of the knee.

Nerve to muscle and its spinal segment is Superior gluteal nerve roots(L4,L5,S1).

O. Iliac crest (posterior to anterior iliac spine)

I. Iliotibial track (which continues to attach to the lateral condyle of the tibia)

Note:  Iliotibial track is also known as the IT Band


Adductor Brevis

Action Adduction of the femur & assists in flexion of the femur at the hip (synergist). 

Nerve to muscle and spinal segment is Obturator nerve roots (Ls-L4).



O. Anterior pubis

I. Linea aspera of the posterior femur



Adductor Longus

Action adduction of the femur at the hip & assists in flexion of the femur at the hip (synergist).

Nerve to muscle and spinal segment is Obturator nerve roots (L3-L4).

O. Anterior pubis

I. Linea aspera of the   posterior femur


Adductor Magnus

Action adduction of the femur at the hip, assists flexion of the femur at the hip (synergist) & medial or internal rotation of the femur at the hip (anterior head).

Nerve to muscle and spinal segment anterior head Obturator nerve (L2-L4).  Nerve to muscle and spinal segment posterior head Sciatic nerve roots (L4-L5 & S1-S3).

O. Anterior (adductor) head:     Inferior ramus of pubis

Posterior (adductor) head: Ischial tuberosity & ramus of ischium

I. Anterior head: Linea aspera of femur Posterior head: Adductor tubercle of femur


Rectus Femoris

Action extension of the knee & assists flexion of the femur at the hip (synergist).

Nerve to muscle and spinal segment is Femoral nerve roots (L2-L4).

O. Anterior inferior iliac spine Ilium at upper rim of acetabulum

I. Patella & tibial tuberosity via patellar ligament



Sartorius

Action flexion (synergist), abduction & lateral rotation of femur at hip. Assists flexion, medial or internal rotation of knee (tailor position).

Nerve to muscle and spinal segment is Femoral nerve roots (L2-L3).

O. Anterior superior iliac spine

I. Upper medial shaft of the tibia


Get Massage Smart makes every effort to insure the accuracy of the educational information provided within the muscle chart lower extremity.  Get Massage Smart does not validate the accuracy of this material and recommends that the original text be consulted. 

To Test Your Knowledge of the Hip Flexors go to Get Body Smart Ilacus, Psoas, Pectineus, Tensor Fasciae Latea, Adductor Brevis, Adductor Longus, Adductor Magnus, Rectus Femoris, and Sartorius Tutorials. ( Get Body Smart as of 2018 is operated by Ken Hub, Still an Awesome Resource, with great new look!)


Go straight to quiz for muscles that act on the anterior thigh (from the hip) Get Body Smart click on the green start quiz button.

  • It can be helpful to read through each muscle in this muscle chart lower extremity, 2 to 3 times before moving on to Get Body Smart.
  • Scroll down to the second image to see the origin and insertion, you can click on the last number to see a single muscle with red origin and blue insertion or use the arrows provided. 
  • As you scroll down the page you will now see a large version of the action man example, click play and enjoy. 
  • Nerve to Muscle and Spinal Segment is Listed below the Action Man, just before the self-test; review at getmassagesmart.com and as you scroll down see if you know it.  It is important as massage therapists to know your nerves, although they do not play a large role in your licensing exam, you may be asked one or two.
  • You can quiz yourself on the names of muscles from the main individual muscle information page at the bottom.  
  •  At the Bottom of the page you will see the footer, on the left side is Subject areas, the last listing is system quizzes; once on the system quizzes page click on muscular system.  To test your knowledge of the Hip Flexors click on the tab that says muscles that act on the anterior thigh (from the hip).  Go straight to quiz for muscles that act on the anterior thigh (from the hip) Get Body Smart click on the green start quiz button.

Return to Video Series Lower Extremity


Gray's Anatomy Image Posterior Thigh: Gluteus Maximus is highlighted in lime green, Biceps Femoris long head is highlighted in orange, Biceps Femoris short head is highlighted in yellow, Semitendinosus is highlighted in pink, Semimembranosus is highlighted in baby blue, and Adductor Magnus is highlighted in purple.


Extensors of the Femur at the Hip
Antagonists are the Flexors of the Femur at the Hip

Muscle Chart Lower Extremity
Click on the Name of the Muscle to see Muscle Image.  Click on the action to see a detailed discussion & group in motion


Muscle, Action, & Nerve

Origin

Insertion


Gluteus Maximus

Prime mover of Running, going up stairs, rising from a sitting position, and climbing rather than walking.

Action Extension of the femur at the hip, extension of the trunk & Lateral or external rotation of the extended hip.

Nerve to muscle and spinal segment is the Inferior gluteal nerve roots  L5, S1, and S2.

O. Posterior sacrum   Ilium (vialigamentous sheath) Superior gluteal line of ilium

I. Gluteal tuberosity of femur Iliotibial tract     (which continues to attaché to the      lateral condyle of the tibia)


Biceps Femoris (Long Head)

Prime mover of extension of the femur at the hip as in walking.

Action extension of femur at hip & flexion of the knee (both heads) & lateral or external rotation of knee (both heads).

Nerve to muscle and spinal segment is long head Sciatic nerve Tibial division S1-S3.

Nerve to muscle and spinal segment is short head Sciatic nerve Peroneal division L5, S1-S2.

O. Long Head: Ischial tuberosity

   Short Head: Linea aspera



I. Head of the fibula lateral aspect


Semitendinous


Prime Mover of extension of the femur at the hip as in walking.

Action Extension of femur at hip, Flexion of knee & Medial or internal rotation of flexed knee.

Nerve to muscle and spinal segment is Sciatic nerve Tibial division L5, S1-S2.

O. Ischial tuberosity

I.  Anterior proximal     tibial shaft


Semimembranosus

Prime Mover of extension of the femur at the hip as in walking.

Action Extension of the femur at the hip, Flexion of the knee & Medial or internal rotation of the flexed knee.

Nerve to muscle and spinal segment is Sciatic nerve Tibial division L5, S1-S2.

O.  Ischial tuberosity

I.  Posterior medial    tibial condyle


Adductor Magnus

(Posterior Head)

Action assists extension of the femur at the hip (synergist) & medial rotation or internal of the hip (synergist). Action adduction of the femur at the hip.

Nerve to muscle Anterior is Obturator nerve roots L2-L4. Nerve to muscle Posterior is Sciatic nerve roots L4-L5, S1-S3.

O.  Anterior head: Inferior ramus of Pubis   

Posterior head: Ischial tuberosity  and ramus of ischium.


I.  Anterior head:Linea aspera of femur 

Posterior head: Adductor tubercle of femur



Get Massage Smart makes every effort to insure the accuracy of the educational information provided within the muscle chart lower extremity.  Get Massage Smart does not validate the accuracy of this material and recommends that the original text be consulted. 

To Test Your Knowledge of the Hip Extensors go to Get Body Smart Gluteus Maximus , Biceps Femoris long head, Semitendinosus, Semimembranosus, and Adductor Magnus Tutorials.


Go straight to quiz for muscles that act on the posterior thigh (from the hip) at Get Body Smart click on the green start quiz button.

  • It can be helpful to read through each muscle in this muscle chart lower extremity, 2 to 3 times before moving on to Get Body Smart.
  • Scroll down to the second image to see the origin and insertion, you can click on the last number to see a single muscle with red origin and blue insertion or use the arrows provided.  
  • As you scroll down the page you will now see a large version of the action man example, click play and enjoy.
  • Nerve to Muscle and Spinal Segment is Listed below the Action Man, just before the self-test; review at getmassagesmart.com and as you scroll down see if you know it.  It is important as massage therapists to know your nerves, although they do not play a large role in your licensing exam, you may be asked one or two. 
  • You can quiz yourself on the names of muscles from the main individual muscle information page at the bottom, as the muscle image is not labeled until you click on the numbers.
  • At the Bottom of the page you will see the footer, on the left side is Subject areas, the last listing is system quizzes; once on the system quizzes page click on muscular system. To test your knowledge of the Hip Extensors click on the muscles that act on the posterior thigh (from the hip).  Go straight to quiz for muscles that act on the posterior thigh (from the hip) at Get Body Smart click on the green start quiz button.

Return to Video Series Lower Extremity


Gray's Anatomy image Posterior Thigh: Gluteus Medius is highlighted in green and Gluteus Minimus is highlighted in organge.

Gray's Anatomy Image Anterior Thigh: Tensor Fasciae Latae is highlighted in orange and Sartorius is highlighted in green.

Abductors of the femur of the hip

Antagonists are adductors of the femur of the hip 

Muscle Chart Lower Extremity
Click on the Name of the Muscle to see Muscle Image.  Click on the action to see a detailed discussion & group in motion

Muscle, Action, & Nerve

Origin

Insertion


 Gluteus Medius

Prime Mover of abduction of the femur at the hip.

Action abduction of the femur at the hip & (Anterior Fibers) Medial rotation  of the femur at the hip.

Nerve to muscle and spinal segment is Superior gluteal nerve roots L4-L5 & S1.




O. Iliac Crest      Ilium between superior & medial gluteal lines

I. Greater trochanter of femur


Gluteus Minimus

Prime mover of abduction of the femur of the hip.

Action abduction of the femur at the hip & assists with medial or internal rotation of the femur at the hip.

Nerve  to muscle and spinal segment is Superior gluteal nerve roots L4-L5 & S1.

O. Posterior Ilium between  the middle and inferior gluteal lines

I. Anterior surface of the greater trochanter of the femur


Tensor Fasciae Latae

Action assists in abduction of the femur at the hip, flexion of the femur at the hip and extension of the knee.

Prevents the collapse of an extended Knee when walking.

Nerve to muscle and spinal segment is Superior gluteal nerve roots L4-L5 & S1.


O. Iliac crest just posterior to anterior superior iliac    spine

I. Iliotibial tract to the lateral condyle of the tiba


Sartorius

Action assists abduction, flexion, and lateral rotation of the femur.  Assists flexion and medial o rotation of the knee (refered to as the tailor position).

Sartorius is the longest muscle in the body ,as well as the must superficial thigh muscle. 

Nerve to muscle and spinal segment is femoral nerve roots L2-L4.


O. Anterior superior iliac spine

I. Upper medial shaft of the tibia


Get Massage Smart makes every effort to insure the accuracy of the educational information provided within the muscle chart lower extremity.  Get Massage Smart does not validate the accuracy of this material and recommends that the original text be consulted. 

To Test Your Knowledge of the Hip Abductors go to Get Body Smart Tutorials.

  • It can be helpful to read through each muscle in this muscle chart lower extremity, 2 to 3 times before moving on to Get Body Smart.
  • At getbodysmart.com Review the information on the muscles then take the muscle quiz provided. 
  • Make sure you click on the blue high lighted action to see the body animation perform that action, slide the tab under the animation to have it repeat the action and slide the tab next to the muscles to remove and add muscles to your view. 
  •  Also if you click on the blue high lighted origin or insertion, you will see a single muscle with red origin and blue insertion. 
  • You can quiz yourself from the main muscle information page or you can click on the system quizzes on the right side of the page. 
  • The first quizzes to open will be on the skeletal system, click next from the top of the page to see the muscle quiz selection.  To test your knowledge of the Hip Abductors click on the tab that says muscles that act on the posterior thigh (from the hip).  Go straight to quiz for muscles that act on the posterior thigh (from the hip) at Get Body Smart.

Return to Video Series Lower Extremity


Gray's Anatomy Image:  Adductor Magnus is highlighted in light green, Adductor Brevis is highlighted in orange, Adductor Longus is highlighted in red, Pectineus is cut away only showing its origin on the anterior pubis and Gracilis is not seen in the image.

Adductors of the femur of the hip

Antagonists are abductors of the femur of the hip 


Muscle Chart Lower Extremity
Click on the Name of the Muscle to see Muscle Image.  Click on the action to see a detailed discussion & group in motion

Muscle, Action, & Nerve

Origin

Insertion


Adductor Magnus

Primer Mover of Adduction of the femur at the hip.

Action Adduction of the Hip Joint: anterior head assists flexion and medial rotation of the femur at the hip.  Posterior head: assists extension and lateral  rotation of the femur at the hip.

Adductor Magnus is the largest & deepest of the adductors of the femur. Depending on the starting position of flexion or extension this muscle can assist in both medial and lateral rotation of the hip.

Nerve to muscle and spinal segment 0f Anterior portion of muscle is Obturator nerve segments L20L4.  Nerve to muscle and spinal segment of Posterior portion is Sciatic nerve roots L4-L5 & S1-S3.



O.  Anterior Head: Inferior ramus of pubis

 Posterior Head: Ischial tuberosity & ramus of ischium

I.  Anterior Head: Linea aspera of femur

Posterior Head: Adduct or tubercle of femur


Adductor Brevis

Prime Mover of adduction of the femur at the hip.

Action assists flexion of the femur at the hip.

Nerve to muscle and spinal segments Obturator nerve roots L3-L4.


O.   Anterior Pubis

I.  Linea Aspera on posterior Femur


Adductor Longus

Prime Mover of adduction of the femur at the hip.

Action assists flexion of the femur at the hip.

Nerve to muscle and spinal segment Obturator nerve roots L3-L4.

O.  Anterior Pubis

I.  Linea Aspera on Posterior Femur


Gracilis

Weak Prime Mover of adduction of the femur at the hip.

Action assist flexion & medial or internal rotation of flexed knee.

Nerve to muscle and spinal segment Obturator Nerve roots L2-L4.

O. Inferior ramus of anterior pubis

I.  Medical proximal tibia


Pectineus

Action flexion of femur at the hip. Assists as a synergist of adduction of the femur at the hip.

Nerve to muscle and its spinal segment is Femoral nerver roots (L2-L4).

O.  Anterior Pubis

I.  Between lesser trochanter and linea aspera of posterior femur


Get Massage Smart makes every effort to insure the accuracy of the educational information provided within the muscle chart lower extremity.  Get Massage Smart does not validate the accuracy of this material and recommends that the original text be consulted. 

To Test Your Knowledge of the Hip Adductors go to Get Body Smart Tutorials.

  • It can be helpful to read through each muscle in this muscle chart lower extremity, 2 to 3 times before moving on to Get Body Smart.
  • At getbodysmart.com Review the information on the muscles then take the muscle quiz provided. 
  • Make sure you click on the blue high lighted action to see the body animation perform that action, slide the tab under the animation to have it repeat the action and slide the tab next to the muscles to remove and add muscles to your view. 
  • Also if you click on the blue high lighted origin or insertion, you will see a single muscle with red origin and blue insertion.
  • You can quiz yourself from the main muscle information page or you can click on the system quizzes on the right side of the page. 
  • The first quizzes to open will be on the skeletal system, click next from the top of the page to see the muscle quiz selection.  To test your knowledge of the Hip Adductors click on the tab that says muscles that act on the anterior thigh (from the hip).  Go straight to quiz for muscles that act on the anterior thigh (from the hip) at Get Body Smart.

Return to Video Series Lower Extremity


Gray's Anatomy Image Plate:(Please) Piriformis is highlighted in orange, (G) Gemellus Superior is highlighted in red,(O) Obturator Internus is highlighted in light green,(G) Gemellus Inferior is highlighted in green,(O) Obturator Externus is not seen in the image,(Quick) Quadratus Femoris is highlighted in red

Lateral (External) Rotators of the femur of the hip

Antagonists are Medial (Internal) Rotators of the femur of the hip 


Muscle Chart Lower Extremity
Click on the Name of the Muscle to see Muscle Image.  Click on the action to see a detailed discussion & group in motion

Muscle, Action, & Nerve

Origin

Insertion


Piriformis

Prime mover of Lateral or External Rotation of the femur at hip

Use the Phrase Please G O G O Quick to remember the order of these muscles form superior to inferior.

Nerve to muscle and spinal segment branches from the sacral plexus roots L4-L5 and S1-S2.

O.  Anterior Sacrum Ishium Obturator Foramen

I.  Greater Trochantor of the Femur


Gemellus Superior

Prime mover of lateral or external rotation of the femur at the hip.

Nerve to muscle and spinal segments branches of the sacral plexus roots L4-L5 and S1-S2.

O.  Anterior Sacrum Ishium Obturator Foramen

I.  Greater Trochantor of the Femur


Obturator Internus

Prime mover of lateral or external rotation of the femur at the hip.

Nerve to muscle and spinal segments branches of the sacral plexus roots L4-L5 and S1-S2.

O.  Anterior Sacrum Ishium Obturator Foramen

I.  Greater Trochantor of the Femur


Gemellus Inferior

Prime mover of lateral or external rotation of the femur at the hip.

Nerve to muscle and spinal segments branches of the sacral plexus roots L4-L5 and S1-S2.

O. Anterior Sacrum Ishium Obturator Foramen

I.  Greater Trochantor of the Femur


Obturator Externus

Prime mover of lateral or external rotation of the femur at the hip.

Nerve to muscle and spinal segments Obturator nerve L3-L4.

O.  Anterior Sacrum Ishium Obturator Foramen

I.  Greater Trochantor of the Femur

Quadratus Femoris

Prime mover of lateral or external rotation of the femur at the hip.

Nerve to muscle and spinal segments branches of the sacral plexus roots L4-L5 and S1-S2.

O.  Anterior Sacrum Ishium Obturator Foramen

I.  Greater Trochantor of the Femur


Gluteus Maximus

Prime mover of lateral or external rotation of extended hip.

Action extension of femur at the hip.

Gluteus maximus is a power muscle that moves the body upstairs, rising from a sitting position, climbing or running rather than walking.

Nerve to muscle and spinal segment inferior gluteal nerve roots L5 and S1-S2.

O. Posterior sacrum Ilium (via ligamentous sheath)

Superior gluteal line of  ilium

I. Gluteal tuberosity of femur, Iliotibial tract (which continues to attaché to the lateral condyle of the tibia)


Sartorius

Action assists lateral or external rotation of the femur at the hip, flexion of the hip, abduction of the hip. Assists flexion of the knee and medial rotation of the knee.

The longest muscle found in the body and forms the lateral boarder of the femoral triangle.

Nerve to muscle and spinal segments femoral nerve roots L2-L4.

O. Anterior superior iliac spine

I. Upper medial shaft of the tibia


Get Massage Smart makes every effort to insure the accuracy of the educational information provided within the muscle chart lower extremity.  Get Massage Smart does not validate the accuracy of this material and recommends that the original text be consulted. 

To Test Your Knowledge of the Lateral Hip Rotators go to Get Body Smart Tutorials.

  • It can be helpful to read through each muscle in this muscle chart lower extremity, 2 to 3 times before moving on to Get Body Smart.
  • At getbodysmart.com Review the information on the muscles then take the muscle quiz provided. 
  • Make sure you click on the blue high lighted action to see the body animation perform that action, slide the tab under the animation to have it repeat the action and slide the tab next to the muscles to remove and add muscles to your view. 
  • Also if you click on the blue high lighted origin or insertion, you will see a single muscle with red origin and blue insertion.
  • You can quiz yourself from the main muscle information page or you can click on the system quizzes on the right side of the page. 
  • The first quizzes to open will be on the skeletal system, click next from the top of the page to see the muscle quiz selection.  To test your knowledge of the Lateral Hip Rotators click on the tab that says muscles that act on the posterior thigh (from the hip).  Go straight to quiz for muscles that act on the posterior thigh (from the hip) at Get Massage Smart.

Return to Video Series Lower Extremity


Gray's Anatomy Image Plate: Adductor Magnus is highlighted in Orange, Gluteus Medius is highlighted in Green, Gluteus Minimus is highlighted in yellow

Medial (Internal) Rotators of the femur at the Hip
Antagonists are Lateral (External) Rotators of the Hip

Muscle Chart Lower Extremity
Click on the Name of the Muscle to see Muscle Image.  Click on the action to see a detailed discussion & group in motion

Muscle, Action, & Nerve

Origin

Insertion


Gluteus Minimus

Prime mover of medial or internal rotation of the femur of the hip.

Action abduction of the femur at the hip & medial or internal rotation of the femur at the hip.

Nerve  to muscle and spinal segment is Superior gluteal nerve roots L4-L5 & S1.

O. Posterior Ilium between the middle and inferior gluteal lines

I. Anterior surface of the greater trochanter of the   femur


Gluteus Medius

Prime Mover of medial or internal rotation of the femur at the hip.

Action abduction of the femur at the hip & (Anterior Fibers) Medial or internal rotation of the femur at the hip.

Nerve to muscle and spinal segment is Superior gluteal nerve roots L4-L5 & S1.

O. Iliac Crest      Ilium between superior & medial gluteal lines


I. Greater trochanter of femur


Tensor Fasciae Latea

Action assists medial or internal rotation, in abduction of the femur at the hip, flexion of the femur at the hip and extension of the knee.

Prevents the collapse of an extended Knee when walking.

Nerve to muscle and spinal segment is Superior gluteal nerve roots L4-L5 & S1.

O. Iliac crest just posterior to anterior superior iliac spine

I. Iliotibial track (which continues to attach to the lateral condyle of the tibia)

Note:  Iliotibial track is also known as the IT Band


Adductor Magnus

Action assist medial or internal rotation of the femur at the hip (anterior head), adduction of the femur at the hip, & assists flexion of the femur at the hip (synergist).

Nerve to muscle and spinal segment anterior head Obturator nerve (L2-L4).  Nerve to muscle and spinal segment posterior head Sciatic nerve roots (L4-L5 & S1-S3).

O. Anterior (adductor) head:     Inferior ramus of pubis

Posterior (adductor) head: Ischial tuberosity& ramus of ischium

I.  Anterior head:Linea aspera of femur

Posterior head: Adductor tubercle of femur


Get Massage Smart makes every effort to insure the accuracy of the educational information provided within the muscle chart lower extremity.  Get Massage Smart does not validate the accuracy of this material and recommends that the original text be consulted. 

To Test Your Knowledge of the Medial Hip Rotators go to Get Body Smart Tutorials.

  • It can be helpful to read through each muscle in this muscle chart lower extremity, 2 to 3 times before moving on to Get Body Smart.
  • At getbodysmart.com Review the information on the muscles then take the muscle quiz provided. 
  • Make sure you click on the blue high lighted action to see the body animation perform that action, slide the tab under the animation to have it repeat the action and slide the tab next to the muscles to remove and add muscles to your view. 
  • Also if you click on the blue high lighted origin or insertion, you will see a single muscle with red origin and blue insertion.
  • You can quiz yourself from the main muscle information page or you can click on the system quizzes on the right side of the page. 
  • The first quizzes to open will be on the skeletal system, click next from the top of the page to see the muscle quiz selection.  To test your knowledge of the Medial Hip Rotators click on the tab that says muscles that act on the posterior thigh (from the hip).  Go straight to quiz for muscles that act on the posterior thigh (from the hip) at Get Massage Smart.

Return to Video series Lower Extremity


Grey's Anatomy Image Plate: Biceps Femoris long head is highlighted in orange and short head is highlighted in green

Lateral or External Rotator of the Knee

Antagonists Medial or Internal Rotators of the Knee

Muscle Chart Lower Extremity
Click on the Name of the Muscle to see Muscle Image.  Click on the action to see a detailed discussion & group in motion

Muscle, Action, & Nerve

Origin

Insertion

Biceps Femoris

Prime mover of extension of the femur at the hip as in walking.

Action extension of femur at hip & flexion of the knee (both heads) & lateral or external rotation of knee (both heads).

Nerve to muscle and spinal segment is long head Sciatic nerve Tibial division S1-S3.

Nerve

to muscle and spinal segment is short head Sciatic nerve Peroneal division L5, S1-S2.

O. Long Head: Ischial  tuberosity

Short Head: Linea aspera

I. Head of the fibula lateral aspect


Get Massage Smart makes every effort to insure the accuracy of the educational information provided within the muscle chart lower extremity.  Get Massage Smart does not validate the accuracy of this material and recommends that the original text be consulted. 

To Test Your Knowledge of the Biceps Femoris go to Get Body Smart Tutorials.

  • It can be helpful to read through each muscle in this muscle chart lower extremity, 2 to 3 times before moving on to Get Body Smart.
  • At getbodysmart.com Review the information on the muscles then take the muscle quiz provided. 
  • Make sure you click on the blue high lighted action to see the body animation perform that action, slide the tab under the animation to have it repeat the action and slide the tab next to the muscles to remove and add muscles to your view. 
  •  Also if you click on the blue high lighted origin or insertion, you will see a single muscle with red origin and blue insertion. 
  • You can quiz yourself from the main muscle information page or you can click on the system quizzes on the right side of the page. 
  • The first quizzes to open will be on the skeletal system, click next from the top of the page to see the muscle quiz selection.  To test your knowledge of the Hip Extensors click on the tab that says muscles that act on the posterior thigh (from the hip).  Go straight to quiz for muscles that act on the posterior thigh (from the hip) at Get Body Smart.
  • Return to Video series Lower Extremity


    Grey's Anatomy Plate: Gracilis is highlighted in the first plate in light orange, Semitendinosus is highlighted in orange, Semimembranosus in light green and the fascia of Popletius is highlighted in yellow.  In the second plate Sartorius is highlighted in lavender.

    Medial or Internal Rotators of the Knee

    Antagonists Lateral or External Rotators of the Knee

    Muscle Chart Lower Extremity
    Click on the Name of the Muscle to see Muscle Image.  Click on the action to see a detailed discussion & group in motion

    Muscle, Action, & Nerve

    Origin

    Insertion

    Semitendinous

    Prime Mover of extension of the femur at the hip as in walking.

    Action Extension of femur at hip, Flexion of knee & Medial or internal rotation of flexed knee.

    Nerve

    to muscle and spinal segment is Sciatic nerve Tibial division L5, S1-S2.

    O. Ischial tuberosity

    I.  Anterior proximal tibial shaft


    References & Resources for the muscle anatomy information:

    Sieg and Adams: "Illustrated Essentials of Musculoskeletal Anatomy", 4th edition, 2002, Megabooks Inc,

    Muscolino J E: The Muscular System Manual, The Skeletal Muscles of the Human Body, ed 3, 2009,
    Elsevier/Mosby. 

    University of Michigan Medical School: Muscle Tables & Illustrations

    Getbodysmart.com

    Learning Resource: The Hip Joint & Pelvic Girdle
    (PDF) Printable Power Point from
    The Manual of Structural Kinesiology R.T. Floyd, EdD, ATC, CSCS
    Kean.edu Kean College


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