Lumbar Plexus

Question 1

What is the sensory distribution of the iliohypogastric nerve?

Answer 1

Skin of the posterolateral gluteal region
Skin of the suprapubic region

Question 2

What is the Motor distribution of the iliohypogastric nerve?

Answer 2

Internal obliques, transversus abdominis

Question 3

What is the sensory distribution of the ilioinguinal nerve?

Answer 3

From the scrotum to the root of the penis in males
The labium majus and mons pubis in females

Question 4

What is the motor distribution of the ilioinguinal nerve?

Answer 4

Internal abdominal oblique muscles

Question 5

What is the sensory distribution of the genitofemoral nerve?

Answer 5

Genital branch= anterior scrotum in males, mons pubis and labium majus in females
Femoral branch= skin of the upper anterior thigh

Question 6

What is the motor distribution of the Genitofemoral nerve?

Answer 6

Genital branch= cremaster muscle

Question 7

What is the sensory distribution of the lateral femoral cutaneous nerve?

Answer 7

Skin over the anterior and posterior aspects of the lateral thigh, down to the level of the knee

Question 8

What is the sensory distribution of the obturator nerve?

Answer 8

Skin over the medial aspect of the thigh

Question 9

What is the motor distribution of the obturator nerve?

Answer 9

Obturator externus, adductor Magnus, adductor brevis, adductor longus, gracilis and pectineus

Question 10

What are the nerves within the lumbar plexus? And what are their nerve roots?

Answer 10

Iliohypogastric nerve-L1
Ilioinguinal nerve-L1
Genitofemoral nerve-L1-L2
Lateral femoral cutaneous nerve- L2-L3
Femoral nerve-L2-L4
Obturator nerve- L2-L4