LE muscles and innervations

Question 1

Adductor muscle group

Answer 1

1. Adductor Longus- obturator n
   - straight add
2. Adductor Brevis- obturator n
   - add/ flex/IR
3. Adductor Magnus- obturator n
   - ant fibers: flex/add/IR
   - post fibers- ext/add/ER
4. Pectineus- femoral n
   - add/flex/IR
5. Gracilis- obturator n
   - add/ knee flexor, IR when knee is flexed

Question 2

One adductor muscle not innervated by Obturator

Answer 2

Pectineus

Question 3

Quad group

Answer 3

1. Vastus Medialis- femoral n
2. Vastus Intermedius- femoral n
3. Vastus Lateralis- femoral n
4. Rectus fem- femoral n

Question 4

Hamstring group

Answer 4

1. Semitendinosis- sciatic n (tibial)
   - flexes knee, extends thigh, IR tibia with knee flexed
2. Semimembranonsis- sciatic n (tibial)
   - flexes knee, extends thigh, IR leg
3. Biceps Femoris- sciatic n (long head - (tibial), short head common fibular)
   - flexes knee,extends thigh
4. Gracilis- obturator N
   - ADD, flexes knee

Question 5

TFL

Answer 5

A: flexes, ABD, IR hip
I: Superior gluteal n

Question 6

Glute med

Answer 6

A: abd hip, IR
I: Superior gluteal N

Question 7

Glute Max

Answer 7

A: Extends hip, ER,
upper fibers Abd
lower fibers ADD
I: Inferior gluteal n

Question 8

Glute min

Answer 8

A: ABD, IR
I: Superior gluteal n

Question 9

Sartorius

Answer 9

A; Flexes, abd, ER
- knee flexor
I: Femoral N

Question 10

Piriformis

Answer 10

A: hip abd/ER
I: ventral rami s1/2

Question 11

Gamelli

Answer 11

Superior
A: hip ER, abd flexed thigh
I: N to obturator internus

Inferior
A: hip ER, abd flexed thigh
I: branch of the nerve to quad femoris

Question 12

Quad femoris

Answer 12

A: ER
I: nerve to quad femoris

Question 13

Obturator Internus/externus

Answer 13

Internus
A: hip ER straight leg, abd hip flexed leg
I: nerve to obturator internus

Externus (right under pectinues)
A: hip ER
I: Obturator N

Question 14

Calf musculature

Answer 14

1. Gastroc (2 joint)
   A: ankle PF knee ext, knee flexor
   I: Tibial N
2. Soleus
   A: ankle PF knee flexed
   I: tibial n
3. Plantaris
   A: PF ankle knee flexor (weak)
   I: tibial n

Question 15

Flexor Hallicus Longus

Answer 15

” Tom Dick Harry”
A: flexes hallux, ankle PF
- also helps support medial longitudinal arch of foot
I: tibial N

Question 16

Flexor Digitorum Longus

Answer 16

” Tom Dick Harry”
A: flexes toes 2-5 (grip ground when walking), ankle PF/inv
- supports foots longitudinal arches
I: tibial n

Question 17

Tib Posterior

Answer 17

” Tom Dick Harry”
A: ankle PF/ inv (in NWB)
- supports
I: tibial N

Shin splints due to repetitive pulling of PTT

Question 18

Tibialis anterior

Answer 18

A: dorsiflexion/inversion
I: deep fibular (peroneal) n

Responsible for anterior compartment syndrome, and shin splints

Question 19

Popliteus

Answer 19

A: Flexes and IR knee. Unlocks knee joint by ER femur on tibia
I: tibial n

Question 20

Fibularis longus

Answer 20

A: ankle eversion, weak PF
I: superficial fibular n

Question 21

Fibularis Brevis

Answer 21

A: ankle eversion, weak PF
I: superficial fibular n

Question 22

Extensor hallucis longus

Answer 22

A: Extends hallux, DF on ankle, weak inverter
I: deep fibular nerve

Question 23

Extensor digitorum longus

Answer 23

A: extends toes 2-5, dorsiflexor of ankle
I: deep fibular nerve