Hand

Question 1

Kienbock’s disease

Answer 1

avascular necrosis of the lunate which can lead to progressive wrist pain and abnormal carpal motion

Question 2

Blood supply scaphoid bone

Answer 2

1) major blood supply is dorsal carpal branch (branch of the radial artery
- enters scaphoid in a nonarticular ridge on the dorsal surface and supplies proximal 80% of scaphoid via retrograde blood flow
2) minor blood supply from superficial palmar arch (branch of volar radial artery)
- enters distal tubercle and supplies distal 20% of scaphoid

Question 3

Intrinsic minus hand posture can result from a variety of causes

Answer 3

• ulnar or median nerve palsy
• Volkmann’s ischemic contracture
• leprosy
• hereditary motor-sensory neuropathy
• failure to splint a crush-injured hand using intrinsic plus posture
• compartment syndrome of the hand,