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MSK > Lower Limb Muscles > Flashcards

Lower Limb Muscles Flashcards

1
Q

What is the innervation of the iliopsoas, psoas major and minor muscles?

A

Anterior rami of lumbar nerves

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2
Q

What is the primary innervation to the muscles of the anterior thigh?

A

Femoral nerve, L2-4

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3
Q

What are the actions of the Pectineus?

A

Adduction
Flexion
Medial rotation

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4
Q

What are the actions of the psoas muscles?

A

Flexion

Stabilisation of the hip

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5
Q

What is the action of the iliacus?

A

Flexion

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6
Q

What are the actions of the sartorius?

A

Flexion
Abduction
Lateral rotation

Flexes leg

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7
Q

What are the actions of the quadriceps muscles?

A

Extend leg
Steady hip
Flexion of thigh

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8
Q

What are the muscles of the anterior thigh?

A 
Pectineus
Iliopsoas
Psoas major and minor
Iliacus 
Sartorius 
Rectus femoris 
Vastus lateralis, intermedius and medialis
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9
Q

What is the primary nerve that innervates the medial thigh muscles and what is the exception?

A

Obturator, L2-4

Hamstring part of adductor Magnus- tibial part of the sciatic nerve

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10
Q

What are the actions of the adductor longus?

A

Adduction

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11
Q

What are the actions of adductor brevis?

A

Adduction

Flexion

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12
Q

What are the actions of adductor Magnus?

A

Adduction
Flexion

Hamstring part: extension

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13
Q

What are the actions of the gracilis muscle?

A

Adduction
Flexes leg
Rotates leg medially

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14
Q

What are the actions of obturator externus?

A

Lateral rotation

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15
Q

Name the muscles of the gluteal region.

A 
Gluteus maximus
Gluteus medius
Gluteus minimus
Tensor fasciae latae
Piriformis
Obturator internus
Superior and inferior gemelli
Quadratus femoris
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16
Q

What is the innervation of the glutes?

A

Glut. maximus- inferior gluteal nerve, S1/2

Glut. medius/minimus- superior gluteal nerve, L5/S1

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17
Q

What is the innervation of the piriformis?

A

Anterior rami, S1/2

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18
Q

What is the innervation of the obturator internus?

A

Nerve to obturator internus, L5/S1

19
Q

What is the innervation of the quadratus femoris?

A

Nerve to quadratus femoris, L5/S1

20
Q

What is the innervation to the gemelli?

A

Superior- nerve to obturator internus

Inferior- nerve to quadratus femoris

21
Q

What is the action of gluteus maximus?

A

Extension

Lateral rotation

22
Q

What is the action of the glutes. Med/minimus and the tensor fascia latae?

A

Abduction
Medial rotation
Stabilisation of the pelvis when weight bearing

23
Q

What are the actions of the piriformis, obturator internus and gemelli?

A

Lateral rotation of extended thigh

Abduction of flexed thigh

24
Q

What is the action of the quadratus femoris?

A

Lateral rotation of the thigh

25
Q

What are the hamstring muscles? (Posterior thigh)

A

Biceps femoris
Semitendinosus
Semimembranosus

26
Q

What is the innervation of the hamstrings?

A

Tibial division of sciatic nerve, L5+S1/2

Short head of biceps- fibular nerve

27
Q

What is the action of the semitendinosus/Semimembranosus?

A

Extension
Medial rotation
Flexion of leg

28
Q

What is the action of biceps femoris?

A

Extension of thigh
Flexion of leg
Lateral rotation of leg

29
Q

What are the muscles of the anterolateral compartment of the leg?

A

Anterior- tibial is anterior, extensor digitorum longus, extensor hallucinating longus (fibular is tertius)
Lateral- fibularis longus and fibularis brevis

30
Q

What nerve innervates the anterolateral compartment?

A

Anterior- deep fibular, L4/5

Lateral- superficial fibular, L5/S1

31
Q

What is the action of the tibialis anterior?

A

Dorsiflexion

Inversion

32
Q

What is the action of the EDL?

A

Dorsiflexion

Extension of lateral four digits

33
Q

What is the action of the EHL?

A

Dorsiflexion

Extension of great toe

34
Q

What is the action of the fibularis brevis/longus muscles?

A

Plantarflexion

Eversion

35
Q

What are the muscles of the posterior leg?

A 
Gastrocnemius
Soleus
Plantaris
Popliteus
Flexor hallucis longus
Flexor digitorum longus
Tibialis posterior
36
Q

What nerve innervates the posterior compartment of the leg?

A

Tibial nerve, L4-S3

37
Q

What is the action of gastrocnemius?

A

Flexion at knee

Plantarflexion

38
Q

What is the action of the soleus?

A

Plantarflexes

39
Q

What is the action of plantaris?

A

Assists gastrocnemius

40
Q

What is the action of the popliteus?

A

Flexes and unlocks knee

Medially rotates tibia

41
Q

What is the action of FHL?

A

Flexes great toe

Weakly Plantarflexes

42
Q

What are the actions of FDL?

A

Flexes lateral four digits

Weakly Plantarflexes

43
Q

What are the actions of tibialis posterior?

A

Plantarflexion

Inversion

44
Q

Name the muscles of the anterior thigh (*including quadriceps).

A 
Pectineus
Iliopsoas
Psoas major 
Psoas minor
Iliacus
Sartorius
Rectus femoris*
Vastus lateralis*
Vastus intermedius*
Vastus lateralis*

MSK (3 decks)

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