LE muscles and innervations Flashcards
Adductor muscle group
- Adductor Longus- obturator n
- straight add - Adductor Brevis- obturator n
- add/ flex/IR - Adductor Magnus- obturator n
- ant fibers: flex/add/IR
- post fibers- ext/add/ER - Pectineus- femoral n
- add/flex/IR - Gracilis- obturator n
- add/ knee flexor, IR when knee is flexed
One adductor muscle not innervated by Obturator
Pectineus
Quad group
- Vastus Medialis- femoral n
- Vastus Intermedius- femoral n
- Vastus Lateralis- femoral n
- Rectus fem- femoral n
Hamstring group
- Semitendinosis- sciatic n (tibial)
- flexes knee, extends thigh, IR tibia with knee flexed - Semimembranonsis- sciatic n (tibial)
- flexes knee, extends thigh, IR leg - Biceps Femoris- sciatic n (long head - (tibial), short head common fibular)
- flexes knee,extends thigh - Gracilis- obturator N
- ADD, flexes knee
TFL
A: flexes, ABD, IR hip
I: Superior gluteal n
Glute med
A: abd hip, IR
I: Superior gluteal N
Glute Max
A: Extends hip, ER,
upper fibers Abd
lower fibers ADD
I: Inferior gluteal n
Glute min
A: ABD, IR
I: Superior gluteal n
Sartorius
A; Flexes, abd, ER
- knee flexor
I: Femoral N
Piriformis
A: hip abd/ER
I: ventral rami s1/2
Gamelli
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
Quad femoris
A: ER
I: nerve to quad femoris
Obturator Internus/externus
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
Calf musculature
- Gastroc (2 joint)
A: ankle PF knee ext, knee flexor
I: Tibial N - Soleus
A: ankle PF knee flexed
I: tibial n - Plantaris
A: PF ankle knee flexor (weak)
I: tibial n
Flexor Hallicus Longus
” Tom Dick Harry”
A: flexes hallux, ankle PF
- also helps support medial longitudinal arch of foot
I: tibial N
Flexor Digitorum Longus
” Tom Dick Harry”
A: flexes toes 2-5 (grip ground when walking), ankle PF/inv
- supports foots longitudinal arches
I: tibial n
Tib Posterior
” Tom Dick Harry”
A: ankle PF/ inv (in NWB)
- supports
I: tibial N
Shin splints due to repetitive pulling of PTT
Tibialis anterior
A: dorsiflexion/inversion
I: deep fibular (peroneal) n
Responsible for anterior compartment syndrome, and shin splints
Popliteus
A: Flexes and IR knee. Unlocks knee joint by ER femur on tibia
I: tibial n
Fibularis longus
A: ankle eversion, weak PF
I: superficial fibular n
Fibularis Brevis
A: ankle eversion, weak PF
I: superficial fibular n
Extensor hallucis longus
A: Extends hallux, DF on ankle, weak inverter
I: deep fibular nerve
Extensor digitorum longus
A: extends toes 2-5, dorsiflexor of ankle
I: deep fibular nerve
