Neuroanatomy Draw It To Know It

4. Peripheral Nervous System—Lower Extremity 69

Abdomen & pelvis Thigh

Iliopsoas

Leg

Quadriceps femoris: rectus femoris, vastus medialis,

vastus intermedius, & vastus lateralis

Saphenous nerve (cutaneous) (and infrapatellar branch)

Medial and intermediate cutaneous nerves of the thigh

Adductor muscles: longus, brevis, (magnus)

Sartorius

Hamstrings: semimembranosus, semitendinosus,

biceps femoris (short and long heads)

Adductor magnus

Femoral nerve

(L2 - L4)

Anterior compartment

Obturator nerve

(L2 - L4)

Medial compartment

Sciatic nerve

(L4 - S2)

Posterior compartment

Pectineus

Gracilis

(L2, L3) Lateral femoral cutaneous nerve

(S1 - S3) Posterior cutaneous nerve of the thigh

(psoas direct

from L1-L3)

(peroneal - short head; tibial - all other hamstrings m.)

Obturator externus

Adductor portion (L2-4)

Hamstrings portion (L4, L5)

DRAWING 4-6 Th e Th igh — Complete