lumbosacral plexus

Question 1

anterior view

Answer 1

Femoral nerve : L2-L4 largest nerve of lumbar plexus supplies anterior part of thigh
Obturator nerve : L2-L4 supplies medial part of thigh
(both stop at knee)
Sciatic nerve : L4-S3 supplies skin and muscles to thigh, leg and foot

Lumbosacral trunk : gives rise to sciatic nerve

Question 2

anterior view with removal of psoas muscle

Question 3

Question 4

angle of inclination of head and neck of femur

Answer 4

• 135 degrees in 3 year old
• 126 degrees in adults
• 120 degrees in old age
• woman have greater angle of inclination than men
• head of femur will go medially and also slightly anterior and superiorly

Question 5

see lecture 21 for parts of hip joint