Nerves

Question 1

Nerve of anterior compartment of thigh

Answer 1

Femoral nerve

Question 2

Root value of femoral nerve

Answer 2

Posterior division of ventral rami of L2 L3 L4

Question 3

Course of femoral nerve

Answer 3

Within psoas major
Descends down psoas major
Comes lateral to psoas major
Between psoas major and iliacus
Enter anterior compartment of thigh behind inguinal ligament and lateral to femoral sheath
Divides to anterior and posterior division

Question 4

Muscles supplied by femoral nerve before entering thigh

Answer 4

Iliacus
Pectineus

Question 5

Muscles supplied by anterior division of femoral nerve

Answer 5

Sartorius
Intermediate cutaneous nerve of thigh
Medial cutaneous nerve of thigh

Question 6

Nerves supplied by posterior division of femoral nerve

Answer 6

Hip joint and rectus femoris
Vastus lateralis
Vastus intermedius
Vastus medialis and knee joint

In leg
Infrapatellar branch
Cutaneous innervation to medial side of leg

In foot
Skin on medial side of foot up to ball of great toe

Question 7

Nerve of adductor compartment

Answer 7

Obturator nerve

Question 8

Root value of obturator nerve

Answer 8

Anterior division of ventral rami of L2 L3 and L4

Question 9

Course of obturator nerve

Answer 9

Arise within psoas major
Descent downwards psoas major
Comes medial to psoas major
Between psoas major and ala of sacrum bone
Enter medial compartment of thigh through obturator foramen
Divides to anterior and posterior division.

Question 10

Muscles supplied by anterior division of obturator nerve

Answer 10

In thigh
Hip joint
Pectineus
Adductor longus
Adductor brevis
Gracilis
Femoral artery

Question 11

Muscles supplied by posterior division of obturator nerve

Answer 11

Obturator externus
Adductor magnus
Adductor brevis
Knee joint
Popliteal artery

Question 12

Nerve of posterior compartment

Answer 12

Sciatic nerve

Question 13

Root value of sciatic nerve

Answer 13

Ventral rami of L4-S3

Question 14

Course of sciatic nerve

Answer 14

Enters back of thigh through greater sciatic foramen
Descends down between greater trochanter and ishial tuberosity
A little above popliteal fossa divides to common peroneal and tibial nerve

Question 15

Muscles innervated by ventral division of ventral rami of sciatic nerve

Answer 15

Semitendinosus
Semimembrinosus
Long head of biceps femoris
Adductor magnus(hamstring part)

Question 16

Dorsal division of ventral rami of sciatic nerve

Answer 16

Short head of biceps femoris

Question 17

Motor supply of sciatic nerve

Answer 17

All muscles of back of thigh
Indirectly all muscles of leg and foot through its terminal branches

Question 18

Sensory supply of sciatic nerve

Answer 18

Not direct sensory supply
Indirectly supplies whole of leg and dorsal and plantar surfaces of foot through its terminal branches

Question 19

How is sciatic nerve injured

Answer 19

Penetrating wounds
Posterior hip dislocation
Fracture of pelvis
Misplaced therapeutic injections

Question 20

Motor loss of sciatic nerve

Answer 20

Weakness of extension of thigh and flexion of knee due to paralysis of hamstring
Loss of all movements of muscles below knee and foot drop
High stepping gait

Question 21

Sensory loss of sciatic nerve

Answer 21

Back of hip thigh and whole of leg and foot except where it is innervated by saphenous nerve