Anatomy: Innervation of the Lower Limb Flashcards
Name the nerve which supplies the skin on middle part of medial thigh
Cutaneous branch of the obturator nerve
Name the motor functions of the obturator nerve
Innervates the muscles of the medial thigh - the obturator externus, adductor longus, adductor brevis, adductor magnus and gracilis
The lateral cutaneous nerve of the thigh is a branch of which nerve?
Lumbar plexus
Name the nerve roots which make up the superior gluteal nerve
L4-S1
Name the motor functions of the nerve to obturator internus
Supplies superior gemellus and obturator internus
Name the nerve roots which make up the nerve to obturator internus
L5-S2
Name the nerve roots which make up the femoral nerve
L2-L4
Which division of the common fibular nerve supplies the muscle of the lateral compartment of the leg and skin/fascia of the dorsum of the foot?
Superficial fibular nerve
Which nerve supplies the majority of the skin of the first interdigital cleft in the foot?
Deep fibular nerve
Name the nerve roots which make up the nerve to quadratus femoris
L4-S1
Name the motor functions of the pudendal nerve
Innervates various pelvic muscles, the external urethral sphincter and external anal sphincter
Name the nerve roots which make up the sciatic nerve
L4-S3
Which areas of the skin are indirectly innervated by the sciatic nerve via its terminal branches?
The skin of the lateral leg, heel, and both the dorsal and plantar surfaces of the foot
Name the nerve roots which make up the inferior gluteal nerve
L5-S2
Which muscles of the lower limb are supplied by the sciatic nerve?
Muscles of the posterior thigh and the hamstring portion of the adductor magnus, indirectly innervates (via terminal branches) all the muscles of the leg and foot
Which nerve supplies the majority of the skin of the plantar surface of the foot (heel and majority of sole)?
Tibial nerve (medial and lateral plantar nerves)
Name the motor functions of the inferior gluteal nerve
Supplies gluetus maximus
Where does the sciatic nerve most commonly divide?
At the superior apex of the popliteal fossa
Which nerve supplies the majority of the skin of the proximal medial border of the dorsum of the foot?
Saphenous nerve
Branches of which nerves supply the skin of the leg and foot?
Femoral, sciatic and tibial
Which nerve is vunerable to compression injury against the neck of the fibula (e.g. in a tight plaster cast), or in fractures of the fibular neck?
Common fibular nerve
Which nerve supplies the majority of the skin of the proximal lateral border of the plantar surface of the foot?
Sural nerve
Where should gluteal IM injections be given to avoid the sciatic nerve?
In the upper lateral quadrant of the gluteal region
Name the sensory functions of the pudendal nerve
Innervates the external genitalia of both sexes and the skin around the anus, anal canal and perineum
Name the motor functions of the superior gluteal nerve
Supplies gluetus medius and minumus
Name the principle nerve of the perineum
Pudendal nerve
Name the nerve which supplies the skin of the inferior half of the buttock, the skin of the posterior thigh and the skin of the popliteal fossa
Posterior cutaneous nerve of the thigh
Name the artery which supplies the sciatic nerve
Artery to the sciatic nerve
Name the nerve which supplies the skin on anterior and lateral aspects of the thigh down to the knee
Lateral cutaneous nerve of the thigh
Name the motor functions of the nerve to quadratus femoris
Supplies hip joint, inferior gemellus and quadratus femoris
Name the nerve roots which make up the obturator nerve
L2-L4
Which division of the common fibular nerve supplies the muscles of the anterior compartment of the leg and the skin of the first interdigital cleft?
Deep fibular nerve
Name the sensory functions of the femoral nerve
Innervates the skin on the anterior thigh and the medial leg
Name the two branches of the sciatic nerve when it divides, usually in the region of the popliteal fossa
Tibial nerve and common fibular nerve
Name the nerve which supplies the skin on anterior and medial aspects of the thigh
Anterior cutaneous nerve of the thigh
Name the motor functions of the femoral nerve
Innervates the muscles of the anterior thigh - the illiacus, pectineus, sartorius and quadriceps femoris
Name the two divisions of the common fibular nerve
Deep and superficial fibular nerves
Name the nerve roots which make up the pudendal nerve
S2-S4
Which nerve supplies the majority of the skin on the dorsum of the foot?
Mainly superficial fibular nerve
The anterior cutaneous nerve of the thigh is a branch of which nerve?
Femoral nerve
Name the two lines which divide the quadrants of the gluteal region
Greater trochanter to PSIS, midpoint of iliac crest
