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Lower Extremity Muscles Flashcards

1
Q

What nerve innervates the Piriformis

A

S1 S2

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2
Q

What is the function of the Piriformis

A

Laterally rotates the extended Femur

Abducts the flexed femur

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3
Q

What nerve innervated the Obturator internus muscle

A

Nerve to obturator internus (L5 S1)

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4
Q

What is the function of the Obturator internus muscle

A

Laterally rotate the extended femur

Abducts the flexed femur

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5
Q

What nerve innervated the gemellus superior muscle

A

Nerve to obturator internus (L5, S1)

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6
Q

What is the function of the gemellus superior muscle

A

Laterally rotate the extended femur

Abducts the flexed femur

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7
Q

What nerve innervates the gemellus inferior muscle

A

Nerve to quadratus femoris (L5, S1)

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8
Q

What is the function of the gemellus inferior muscle

A

Laterally rotate the extended femur

Abducts flexed femur

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9
Q

What nerve innervates the Quadratus femorus

A

Nerve to quadratus femorus (L5, S1)

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10
Q

What is the function of the Quadratus Femorus

A

Laterally rotate femur

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11
Q

What is the nerve that innervates the Gluteus Minimus

A

Superior Gluteal nerve (L4, L5, S1)

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12
Q

What is the function of the Gluteus Minimus

A

ABdduts femur
Holds pelvis secure over stance leg (prevent pelvic drop)
Medially rotate thigh

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13
Q

What nerve innervates the Gluteus Medius

A

Superior Gluteal nerve (L4, L5, S1)

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14
Q

What is the function of the Gluteus medius

A

ABdduts femur
Holds pelvis secure over stance leg (prevent pelvic drop)
Medially rotate thigh

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15
Q

That nerve innervates the Gluteus maximus

A

Inferior gluteal nerve (L4, L5, S2)

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16
Q

What is the function of Gluteus Maximus

A

Powerful extensor of flexed femur
Lateral stabilizer of the hip
Laterally rotate and abducts thigh

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17
Q

What nerve innervates the tensor fasciae latae

A

Superior Gluteal nerve (L4, L5, S1)

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18
Q

What is the function of the tensor fasciae latae

A

Stabilize the knee in extenstion

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19
Q

What muscle divides the greater sciatic foramen into two parts

A

The Piriformis (vessels pass above, below or through this muscle, and can be the cause of sciatica like symptoms)

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20
Q

What nerve innervates the Psoas Major

A

Anterior rami of L1 L2 L3

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21
Q

What is the function of the Psoas Major

A

Flexexs the thigh at the hip

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22
Q

What nerve innervates the illiacus

A

Femoral nerve L2 L3

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23
Q

What is the function of the illiacus

A

Flexes the thigh at the hip

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24
Q

What nerve innervates the Vastus medialis muscle

A

Femoral nerve L2 L3 L4

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25
What is the function of the illiacus
Extend leg at the knee
26
What nerve innervates the Vastus medialis muscle
Femoral nerve L2 L3 L4
27
What is the function of the Vastus medialis muscle
Extends leg at the knee
28
What nerve innervates the Vastus intermedius
Femoral nerve L2 L3 L4
29
What is the function of the vastus intermedius
Extends leg at the knee
30
What never innervates the vastus lateralis
Femoral nerve L2 L3 L4
31
What is the function of the vastus lateralis
Extends the leg at the knee
32
What nerve innervates the Rectus femoris
Femoral nerve L2 L3 L4
33
What is the function of the rectus femoris
Extends the leg at the knee
34
What nerve innervates the Sartorius
Femoral nerve L2 L3
35
What is the function of the Sartorius
Flexes the thigh at the hop and flexes the leg at the knee
36
What muscles make up the Gluteal region
``` Pirifomris Obturator internus Gemellus Superior Gemellus inferior Quadratus femoris Gluteus minimus Gluteus medius Gluteus Maximus Tensor Fasciae Latae ```
37
What muscles make up the anterior thigh
``` Psoas major Illiacus Vastus Medialis Vastus Lateralis Vastus intermedius Rectus femoris Sartorius ```
38
What muscles make up the Medial thigh
``` Gracillis Pectineus Adductor longus Adductor brevis Adductor magnus Obturator externus ```
39
What nerve innervates the Gracilis
Obturator nerve L2 L3
40
What is the function of the Gracilis
Adducts the thigh at huip | Flexes leg at knee
41
What nerve innervates the Pectineus
Femoral nerve L2 L3
42
What is the function of the pectineus
Adducts and flexes thigh at the hip joint
43
What nerve innervates the adductor longus
Obturator nerve L2 L3 L4
44
What is the function of the adductor longus
Adducts and medially rotates thigh at hip
45
What nerve innervates the adductor brevis
obturator nerve L2 L3
46
What is the function of the adductor brevis
Adducts and medially rotates thigh at hip joint
47
What nerve innervates the adductor magnus (adductor part)
Obturator nerve L2 L3 L4
48
What is the function of the adductor portion of the adductor magnus
Adducts and medially rotates the thigh
49
What nerve innervates the adductor magnus (Hamstring part)
Sciatic nerve L2 L3 L4
50
What is the function of the hamstring portion of the adductor magnus
Adducts and medially rotates the thigh
51
What nerve innervates the obturator externus
Obturator nerve (L3 L4)
52
What is the function of the obturator externus
Laterally rotates thigh
53
What muscles make up the posterior thigh
Biceps femoris Semitendinosus Semimembranosus
54
What nerve innervates the Biceps femoris
Sciatic nerve L5 S1 S2
55
What is the function of the biceps femoris
Flexes leg at knee Extends and laterally rotates thigh Laterally rotates leg at knee
56
What nerve innervates the Semitendinosus
Sciatic nerve L5 S1 S2
57
What is the function of the semitendinosus
Flexes leg at knee Extends thigh at hip Medially rotates thigh and leg
58
What nerve innervates the semimembranosus
Sciatic nerve L5 S1 S2
59
What is the function of the semimembranosus
Flexes leg at knee and extends thigh | Medially rotate thigh and leg
60
What muscles make up the superficial compartment of the posterior leg
Gastrocnemius Plantaris Soleus
61
What nerve innervates the Gastrocnemius
Tibial nerve S1 S2
62
What is the function of the gastrocnemius
Plantar flexes foot and flexes knee
63
What nerve innervates the Plantaris
Tibial nerve S1 S2
64
What is the function of the Plantaris
Plantar flexes foot and flexes knee
65
What nerve innervates the soleus
Tibial nerve S1 S2
66
What is the function of the Soleus
Plantar flexes foot
67
What muscles make up the Deep compartment of the posterior leg
Popliteus Flexor Hallucis longus Flexor digitorum longus Tibialis posterior
68
What nerve innervates the popliteus
Tibial nerve L4 S1
69
What is the function of the popliteus
Stabilize knee joint | Lateral rotation of tibia
70
What nerve innervates the Flexor Hallucis longus
Tibial nerve S2 S3
71
What is the function of the flexor Hallucis longus
Flexes great toe
72
What nerve innervates the Flexor digitorum longus
Tibial nerve S2 S3
73
What is the function of the Flexor Digitorum longus
Flexes lateral 4 toes (2-5)
74
What nerve innervates the Tibialis posterior
Tibial nerve S2 S3
75
What is the function of the tibialis posterior
Inversion and plantarflextion of foot | Support medial arch of foot when walking
76
What muscles make up the lateral leg
Fibularis longus | Fibularis Brevis
77
What nerve innervates the Fibularis Longus
Superficial fibular nerve L5 S1 S2
78
What is the function of the fibularis longus
Eversion and plantarflexion of foot | Supports arches of foot
79
What nerve innervates the fibularis Brevis
Superficial fibular nerve L5 S1 S2
80
What is the funciton of the fibularis Brevis
Eversion of the foot
81
What muscles make up the anterior leg
Tibialis anterior Extensor hallucis longus Extensor digitorum longus Fibularis tertius
82
What nerve innervates the tibialis anterior
Deep fibular nerve L4 L5
83
What is the function of the tibialis anterior
Dorsiflexion of foot and ankle Inversion of foot Support of medial arch
84
What nerve innervates the Extensor Hallucis Longus
Deep fibular nerve L5 S1
85
What is the function of the extensor hallucis longus
Extension of the great toe | dorsiflexion of foot
86
What nerve innervates the extensor digtorum longus
Deep fibular nerve L5 S1
87
What is the function of the extensor digitorum longus
Extend lateral 4 toes (2-5)
88
What nerve innervates the fibularis tertius
Deep fibular nerve (L5 S1)
89
What is the function of the Fibularis tertius
Dorsiflexion and eversion of foot
90
What muscles make of the dorsal aspect of the foot
Extensor Digitorum brevis | Extensor Hallucis brevis
91
What nerve innervates the extensor digitorum brevis
Deep Fibular nerve S1 S2
92
What is the function of the extensor digitorum brevis
Extension of toes 2-5
93
What never innevates the extensor Hallucis brevis
Deep fibular nerve S1 S2
94
What is the function of the extensor Hallucis brevis
Extension of mp joint of great toe
95
What muscles make up the sole of the foot
``` Abductor hallucis Flexor digtorum brevis Abductor digiti minimi Quadratus Plantae Lumbricals Flexor Hallucis brevis Adductor Hallucis Flexor digiti minimi brevis Dorsal interossei Plantar interossei ```

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