lower extremity nerves + muscles + compartments Flashcards
psoas, iliacus (both = illiopsoas), pectineus, sartorius (3 hip flexors)
vastus lateralis, vastus intermedius, vastus medialis, rectus femoris (knee extension = quads)
motor innervation of femoral nerve
need femorAL to kick a BALL
sensory innervation of:
anterior thigh
medial lower leg
femoral nerve
loss of thigh flexion + leg extension
↓ sensation to anterior thigh + medial lower leg
femoral nerve injury:
pelvic fracture
adductor magnues, adductor longus, adductor brevis (thigh adduction)
gracilis (knee flexion)
motor innervation of obturator nerve
sensory innervation of:
medial thigh
obturator nerve
loss of thigh adduction
↓ sensation to medial thigh
obturator nerve injury:
ANTERIOR dislocation of hip
tensor fascia latae, gluteus medius, gluteus minimus (hip abduction and medial rotation of thigh)
motor innervation of superior gluteal nerve
trendelenburg gait:
normal: lift leg - standing leg (opposite leg) glut contracts
injury: contralateral hip drops, ispilateral to standing leg (no hip aduction)
superior gluteal nerve injury:
POSTERIOR hip dislocation OR
polio
gluteus maximus (hip extension + lateral rotation of thigh)
motor innervation of inferior gluteal nerve
difficulty standing up or climbing stairs or walking
inferior gluteal nerve injury:
POSTERIOR hip dislocation OR
posterior approach during hip replacement surgery
biceps femoris, semitendinosus, semimembranosus, (3 = hamstrings), adductor magnus (hip extension and knee flexion)
motor innervation of sciatic nerve (tibial branch)
sensory innervation of:
posterior thigh and gluteal regions
entire lower leg except medial aspect
sciatic nerve
calf muscles:
gastrocnemius, soleus, plantaris (plantar flexion)
popliteus (unlocks knee when in extension)
flexor hallucis longus, flexor digitorum longus (toe flexion)
tibialis posterior (inversion of foot)
motor innervation of tibial nerve
sensory innervation of:
sole of foot
back of calf
tibial nerve
back of calf = sural nerve
pain in lower back/buttock that travels down leg
+ straight leg test
sciatic nerve injury:
intervertebral disc herniation
spinal stenosis
spondylolisthesis
loss of sensation of SOLE OF FOOT
tibial nerve injury:
knee injury
peroneus longus, peroneus brevis, short head of biceps femoris
motor innervation of common fibular nerve (common peroneal nerve)
sensory innervation of:
lateral lower leg
dorsal side of foot
common fibular nerve (common peroneal nerve)
foot drop (loss of dorsiflexion) peroneal neuropathy (from prolonged bed rest or habitual leg crossing)
common fibular nerve injury:
chronic compression
habitual leg crossing
fracture of NECK of fibula
peroneus tertius (foot eversion) tibialis anterior, extensor hallucis longus, extensor digitorum longus (foot dorsiflexion)
motor innervation of deep fibular nerve (deep peroneal nerve)
sensory innervation of:
webbing between first and second digits
deep fibular nerve (deep peroneal nerve)
foot drop
deep fibular nerve (deep peroneal nerve) injury:
trauma to LATERAL knee
branches of femoral nerve
1) tibial nerve (posterior compartment of leg)
2) common fibular nerve (anterior + lateral compartment of leg)
adductor magnus m. is innervated by
obturator nerve
tibial nerve
branches of tibial nerve
1) sural nerve
2) medial plantar nerve (foot)
3) lateral plantar nerve (foot)
branches of common fibular nerve (common peroneal nerve)
1) lateral sural cutaneous nerve
2) superficial fibular nerve
fibula neck fracture
common fibular nerve (peroneal) most likely injured
