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58 terms

LE Muscles- Hip

UC DPT 2014
STUDY
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Psoas Major
lumbar plexus ventral rami L2-4

hip flexion (origin fixed)
trunk flexion (insertion fixed--as in a sit-up)

Assists: lateral trunk flexion (unilateral action), may assist hip ER and ABD

Note: with insertion fixed, tightness contributes to increased lordosis
Psoas Minor
L1 spinal nerve

flexion of trunk and lumbar spine
Iliacus
Femoral nerve (L2-L3)

hip flexion
flexes pelvis on femur
Pectineus
femoral nerve (L2-L3), obturator (accessory branch L3)

hip adduction

Assists: hip flexion
Gracilis
Obturator (L2-L3)

hip adduction
knee flexion
medial rotation of knee
adductor longus
obturator (L2-L4)

hip adduction

Assists: hip flexion
Adductor Brevis
Obturator (L2-L4)

hip adduction
hip flexion
Adductor Magnus
Obturator and Sciatic (L2-L4)

hip adduction

Assists: may assist hip ext and flex

Note: role in hip rotation depends on position of the thigh
Gluteus Maximus
Inferior gluteal (L5-S2)

Hip ext
Hip ER

Assists: lower fibers: hip ADD, upper fibers: hip ABD
Gluteus Medius
Superior gluteal (L4-S1)

hip ABD
hip ER (post. fibers)
hip IR (ant. fibers)

Assists: ant. may assist flex, post. may assist ext
Gluteus Minimus
superior gluteal (L4-S1)

hip ABD
hip IR
Tensor Fascia Latae
superior gluteal (L4-S1)

hip flex
hip IR
hip ABD
Piriformis
nerve to piriformis/spinal nerves S1-S2

hip ER

Assists: hip ABD when hip is flexed, hip ext
Obturator Internus
nerve to obturator internus off the lumbosacral plexus L5-s1

hip er

Assists: hip ABD when hip is flexed
Obturator Externus
Obturator (L3-L4)

hip ER

Assists: hip ADD
Gemellus Superior
nerve to obturator internus off the lumbosacral plexus (L5-S1)

hip ER

Assists: hip ABD when hip is flexed
Gemellus Inferior
nerve to quadratus femoris off the lumbosacral plexus (L5-S1)

hip ER

Assists: hip ABD when hip is flexed
Quadratus Femoris
nerve to quadratus femoris off the lumbosacral plexus (L5-S1)

hip ER
Biceps Femoris
long head: sciatic (tibial division, L5-S2)
short head: sciatic (peroneal division L5-S2)

Knee flexion
Knee ER
Hip EXT (long head only)

Assists: hip ER (long head only)
Semitendinosus
Semimembranosus
Sciatic (tibial division) L5-S2

knee flex
knee IR
hip ext

Assists: hip IR
Sartorius
femoral (L2-L3)

hip ER
hip ABD
hip flex
knee flex
knee IR
femoral n.
1 pectineus*
2 sartorius
3 iliacus
4 vastus medialis
5 vastus intermedius
6 vastus lateralis
7 rectus femoris
sciatic n. (tibial)
semimembranosus, semitendinosus, biceps femoris**
n. to quadratus femoris
gemellus inf., quadratus femoris,
knee flexion
1 Biceps Femoris
2 Semitendinosus
3 Semimembranosus
4 Sartorius
5 Gracilis
6 Popliteus

Assist:
Gastrocnemius
Plantaris
knee ext
1 Rectus Femoris
2 Vastus Medialis
3 Vastus Lateralis
4 Vastus Intermedius
retracts knee at synovial membrane
Articularis Genus
knee IR
1 Semitendinosus
2 Semimembranosus
3 Sartorius
4 Gracilis
5 Popliteus
knee ER
biceps femoris
sciatic n.
adductor magnus
sciatic n. (peroneal)
biceps femoris**
hip flex
1 Rectus Femoris
2 Adductor Brevis
3 Tensor Fascia Latae
4 Sartorius
5 Iliacus
6 Psoas Major

Assist:
Pectineus
Adductor Longus
Adductor Magnus
Gluteus Medius (anterior fibers)
hip ext
1 Biceps Femoris (long head)
2 Semitendinosus
3 Semimembranosus
4 Gluteus Maximus
Assist:
Gluteus Medius (posterior fibers)
Piriformis
Adductor Magnus
hip ER
1 Gemellus Superior
2 Gemellus Inferior
3 Gluteus Maximus
4 Gluteus Medius (posterior fibers)
5 Obturator Internus
6 Obturator Externus
7 Piriformis
8 Popliteus
9 Quadratus Femoris
10 Sartorius

Assist:
Biceps Femoris (long head)
Adductor Magnus (depending on position)
Psoas Major
hip IR
1 Gluteus Medius (Anterior fibers)
2 Gluteus Minimus
3 Tensor Fascia Latae

Assist:
Semitendinosus
Semimembranosus
**Adductor Magnus (depending on position)
hip ADD
1 Pectineus
2 Gracilis
3 Adductor Magnus
4 Adductor Longus
5 Adductor Brevis

Assist:
Gluteus Maximus (lower fibers)
Obturator Externus
hip ABD
1 glut minimus
2 tensor fascia latae

Assist:
glut max (upper fibers)
sartorius
Psoas Major
Piriformis (when hip is flexed)
Obturator Internus (when hip is flexed)
Gemellus Superior (when hip is flexed)
Gemellus Inferior (when hip is flexed)
trunk flex
psoas major
psoas minor
MP flex toes 2-5
Flexor Digitorum Longus
Flexor Digitorum Brevis
Lumbricales
Plantar Interossei (toes 3-5)
Dorsal Interossei (toes 2-4)
PIP flex toes 2-5
Flexor Digitorum Longus
Flexor Digitorum Brevis
MP ext toes 2-5
Extensor Digitorum Longus
Extensor Digitorum Brevis (toes 2-4)
PIP ext toes 2-5
Extensor Digitorum Longus

Assist:
Extensor Digitorum Brevis (toes 2-4)
Plantar Interossei (toes 3-5)
Lumbricales
Dorsal Interossei (toes 2-4)
DIP flex toes 2-5
Flexor Digitorum Longus
Quadratus Plantar
DIP ext toes 2-5
Extensor Digitorum Longus

Assist:
Extensor Digitorum Brevis (toes 2-4)
Plantar Interossei (toes 3-5)
Lumbricales
Dorsal Interossei (toes 2-4)
lateral truck flex asst.
psoas major
flexes pelvis on femur
iliacus
ankle plantar flex
Gastrocnemius
Plantaris
Soleus

Assist:
Tibialis Posterior
Flexor Digitorum Longus
Flexor Hallucis Longus
Peroneus Longus
Peroneus Brevis
ankle dorsiflex
Tibialis Anterior
Peroneus Tertius

Assist:
Extensor Digitorum Longus
Extensor Hallucis Longus
foot inversion
Gastrocnemius
Soleus
Tibialis Posterior
Tibialis Anterior

Assist:
Flexor Digitorum Longus
Flexor Hallucis Longus
Extensor Hallucis Longus
foot eversion
Peroneus Brevis
Peroneus Longus
Peroneus Tertius

Assist:
Extensor Digitorum Longus
ABD Toes 2-4
dorsal interossei
toe 5 ABD
Abductor Digiti Minimi
toe 4 MP Flex
Abductor Digiti Minimi
Flexor Digiti Minimi Brevis
Great Toe MP Flexion
Flexor Hallucis Brevis

Assist:
Flexor Hallucis Longus
Abductor Hallucis
Adductor Hallucis
great toe MP ext
Extensor Hallucis Longus
Extensor Digitorum Brevis
great toe IP flex/ext
Flexor Hallucis Longus
great toes ABD/ADD
Abductor Hallucis
depression of 1st metatarsal
Peroneus Longus