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The Muscles of
the Lower
Extremity
- A Visual Guide -
Anatomy & Physiology I
BIOL 121
Rob Swatski
Associate Professor of B...
Gluteus
maximus
Extends and laterally rotates
thigh at hip; locks knee in
extension 2
Gluteus
medius
Abducts and
medially
rotates thigh at
hip3
Gluteus
medius
4
Gluteus
minimus
Abducts and medially
rotates thigh at hip5
Tensor fasciae
latae
Abducts and flexes
thigh at hip 6
Tensor fasciae
latae
7
Piriformis
Abducts
and
laterally
rotates
thigh at hip8
Gemellus superior
Abducts and laterally rotates
thigh at hip 9
Obturator internus
Abducts and laterally
rotates thigh at hip10
Gemellus inferior
Abducts and laterally rotates
thigh at hip 11
Psoas
major
Flexes and
laterally rotates
thigh at hip;
flexes trunk on
hip when
sitting up from
supine12
Psoas major
13
Psoas major
14
Iliacus
15
Flexes and
laterally rotates
thigh at hip;
flexes trunk on
hip when
sitting up from
supine
Pectineus
Adducts and flexes
thigh at hip16
Adductor
longus
Adducts, flexes, and
rotates thigh at hip17
Adductor
magnus
Adducts and rotates
thigh at hip; flexes
thigh at hip (anterior);
extends thigh at hip
(posterior)18
Gracilis
Adducts and
medially rotates
thigh at hip; flexes
leg at knee19
Gracilis
20
Gracilis
21
Sartorius
Weakly flexes leg
at knee; weakly
flexes, abducts,
and laterally
rotates thigh at
hip22
Rectus
femoris
Extends leg at
knee
(Quadriceps);
acting alone,
flexes thigh at hip23
Vastus
medialis
Extends leg at knee
(Quadriceps)24
Vastus
medialis
25
Vastus
lateralis
Extends leg at knee
(Quadriceps)26
Biceps
femoris
Flexes leg at knee;
extends thigh at hip
(Hamstrings)27
Biceps
femoris
28
Semitendinosus
Flexes leg at knee; extends
thigh at hip (Hamstrings) 29
Semimembranosus
30
Flexes leg at knee; extends
thigh at hip (Hamstrings)
Gastrocnemius
Plantar flexes
foot at ankle31
Gastrocnemius
32
Soleus
Plantar flexes
foot at ankle33
Soleus
34
Soleus
35
Flexor
digitorum
longus
Plantar flexes foot
at ankle; flexes
toes II-V36
Flexor
hallucis
longus
Plantar flexes foot
at ankle; Flexes
great toe37
Tibialis
anterior
Dorsiflexes foot
at ankle; inverts
(supinates) foot38
Extensor
digitorum
longus
Dorsiflexes foot at
ankle; extends toes39
Extensor
digitorum
longus
40
Fibularis
(Peroneus)
longus
Plantar flexes foot at
ankle; everts
(pronates) foot41
Fibularis
(Peroneus)
longus
42
Fibularis
(Peroneus)
longus
43
Fibularis
(Peroneus)
brevis
Plantar flexes foot
at ankle; everts
(pronates) foot44
Fibularis
(Peroneus)
brevis
45
Fibularis
(Peroneus)
brevis
46
47
I
N
D
E
X
Adductor longus: 17
Adductor magnus: 18
Biceps femoris: 27-28
Extensor digitorum longus: 39-40
Fibularis (Per...
Credits
Photographs and labels by Rob Swatski.
http://robswatski.virb.com/
This work bears an Attribution-Noncommercial Sh...
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Muscles of the Lower Extremity Anatomy Visual Guide

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Muscles of the Lower Extremity Anatomy Visual Guide

This is a visual guide I created as a laboratory study resource for my BIOL 121 Anatomy and Physiology I students on the muscles of the lower extremity.

Credits: All photography, text, and labels by Rob Swatski, Associate Professor of Biology, Harrisburg Area Community College - York Campus, York, PA. Email: rjswatsk@hacc.edu

This work bears an Attribution-Noncommercial Share Alike Creative Commons license, and is also available as individual pages (.jpg) on my Flickr site: http://www.flickr.com/photos/rswatski

Published in: Education, Health & Medicine

Muscles of the Lower Extremity Anatomy Visual Guide

  1. 1. The Muscles of the Lower Extremity - A Visual Guide - Anatomy & Physiology I BIOL 121 Rob Swatski Associate Professor of Biology HACC - York Campus
  2. 2. Gluteus maximus Extends and laterally rotates thigh at hip; locks knee in extension 2
  3. 3. Gluteus medius Abducts and medially rotates thigh at hip3
  4. 4. Gluteus medius 4
  5. 5. Gluteus minimus Abducts and medially rotates thigh at hip5
  6. 6. Tensor fasciae latae Abducts and flexes thigh at hip 6
  7. 7. Tensor fasciae latae 7
  8. 8. Piriformis Abducts and laterally rotates thigh at hip8
  9. 9. Gemellus superior Abducts and laterally rotates thigh at hip 9
  10. 10. Obturator internus Abducts and laterally rotates thigh at hip10
  11. 11. Gemellus inferior Abducts and laterally rotates thigh at hip 11
  12. 12. Psoas major Flexes and laterally rotates thigh at hip; flexes trunk on hip when sitting up from supine12
  13. 13. Psoas major 13
  14. 14. Psoas major 14
  15. 15. Iliacus 15 Flexes and laterally rotates thigh at hip; flexes trunk on hip when sitting up from supine
  16. 16. Pectineus Adducts and flexes thigh at hip16
  17. 17. Adductor longus Adducts, flexes, and rotates thigh at hip17
  18. 18. Adductor magnus Adducts and rotates thigh at hip; flexes thigh at hip (anterior); extends thigh at hip (posterior)18
  19. 19. Gracilis Adducts and medially rotates thigh at hip; flexes leg at knee19
  20. 20. Gracilis 20
  21. 21. Gracilis 21
  22. 22. Sartorius Weakly flexes leg at knee; weakly flexes, abducts, and laterally rotates thigh at hip22
  23. 23. Rectus femoris Extends leg at knee (Quadriceps); acting alone, flexes thigh at hip23
  24. 24. Vastus medialis Extends leg at knee (Quadriceps)24
  25. 25. Vastus medialis 25
  26. 26. Vastus lateralis Extends leg at knee (Quadriceps)26
  27. 27. Biceps femoris Flexes leg at knee; extends thigh at hip (Hamstrings)27
  28. 28. Biceps femoris 28
  29. 29. Semitendinosus Flexes leg at knee; extends thigh at hip (Hamstrings) 29
  30. 30. Semimembranosus 30 Flexes leg at knee; extends thigh at hip (Hamstrings)
  31. 31. Gastrocnemius Plantar flexes foot at ankle31
  32. 32. Gastrocnemius 32
  33. 33. Soleus Plantar flexes foot at ankle33
  34. 34. Soleus 34
  35. 35. Soleus 35
  36. 36. Flexor digitorum longus Plantar flexes foot at ankle; flexes toes II-V36
  37. 37. Flexor hallucis longus Plantar flexes foot at ankle; Flexes great toe37
  38. 38. Tibialis anterior Dorsiflexes foot at ankle; inverts (supinates) foot38
  39. 39. Extensor digitorum longus Dorsiflexes foot at ankle; extends toes39
  40. 40. Extensor digitorum longus 40
  41. 41. Fibularis (Peroneus) longus Plantar flexes foot at ankle; everts (pronates) foot41
  42. 42. Fibularis (Peroneus) longus 42
  43. 43. Fibularis (Peroneus) longus 43
  44. 44. Fibularis (Peroneus) brevis Plantar flexes foot at ankle; everts (pronates) foot44
  45. 45. Fibularis (Peroneus) brevis 45
  46. 46. Fibularis (Peroneus) brevis 46
  47. 47. 47 I N D E X Adductor longus: 17 Adductor magnus: 18 Biceps femoris: 27-28 Extensor digitorum longus: 39-40 Fibularis (Peroneus) brevis: 44-46 Fibularis (Peroneus) longus: 41-43 Flexor digitorum longus: 36 Flexor hallucis longus: 37 Gastrocnemius: 31-32 Gemellus inferior: 11 Gemellus superior: 9 Gluteus maximus: 2 Gluteus medius: 3-4 Gluteus minimus: 5 Gracilis: 19-21 Iliacus: 15 Obturator internus: 10 Pectineus: 16 Piriformis: 8 Psoas major: 12-14 Rectus femoris: 23 Sartorius: 22 Semimembranosus: 30 Semitendinosus: 29 Soleus: 33-35 Tensor fasciae latae: 6-7 Tibialis anterior: 38 Vastus lateralis: 26 Vastus medialis: 24-25
  48. 48. Credits Photographs and labels by Rob Swatski. http://robswatski.virb.com/ This work bears an Attribution-Noncommercial Share Alike Creative Commons license. Visit my website for more Anatomy study resources! http://www.flickr.com/photos/rswatski 48 Please send your comments and feedback to: rjswatsk@hacc.edu

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