Muscles + nerves

Question 1

Nerve root, S + M, and cause of injury of obturator nerve

Answer 1

L2-4 (same as femoral) - out thru obturator foramen
S: little spot on middle medial thigh
M: hip adduction
Ant hip dislocation
Pelvic surg

Question 2

Nerve root, S + M, and cause of injury of femoral nerve

Answer 2

L2-4 (same as obturator) - out under piriformis anteriorly thru greater sciatic foramen
S: lower ant thigh, knee, medial calf
M: hip flexion (psoas major) + knee extend (quad)
Pelvic frx
Mass on iliopsoas/iliacus

Question 3

Nerve root, S + M, and cause of injury of common fibular

Answer 3

L4-S2 - lateral branch of sciatic nerve - will split into superficial and deep fibular nerves
S: lateral calf + top foot +
M: dorsiflex + evert + extend toes (all up)
Damage foot will be plantar + invert
Compress or fracture fibular head

Question 4

Nerve root, S + M, and cause of injury of tibial

Answer 4

L4-S3 - medial branch of sciatic nerve
S: bottom foot
M: plantar flex + invert + toe flex (all down)
Trauma to knee