CHT Hand Anatomy & Biomechanics Flashcards
6 cards from real CHT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CHT Hand Anatomy & Biomechanics flashcards as text
The zone of flexor tendon injury most challenging to repair due to the confined pulley system is:
Answer: Zone II
Zone II ('no man's land') spans the distal palm to the middle of the middle phalanx where both FDS and FDP tendons travel through the confined fibro-osseous sheath, making repairs technically challenging.
Which carpal bone articulates directly with the radius at the radiocarpal joint along with the lunate?
Answer: Scaphoid
The scaphoid and lunate form the proximal carpal row that articulates directly with the distal radius at the radiocarpal joint.
The terminal extensor tendon inserts at which phalanx to extend the DIP joint?
Answer: Distal phalanx base
The terminal extensor tendon inserts at the dorsal base of the distal phalanx; disruption causes a mallet finger deformity.
The median nerve passes through the carpal tunnel alongside how many tendons?
Answer: 9
Nine tendons pass through the carpal tunnel with the median nerve: four FDS, four FDP, and one FPL tendons.
Cubital tunnel syndrome compresses the ulnar nerve at the elbow. The nerve passes:
Answer: Through the cubital tunnel posterior to the medial epicondyle
The ulnar nerve courses through the cubital tunnel posterior to the medial epicondyle, where compression or traction causes cubital tunnel syndrome.
Which ligament, when ruptured, leads to scapholunate dissociation and DISI deformity?
Answer: Scapholunate interosseous ligament
The scapholunate interosseous ligament (SLIL) is the primary stabilizer between the scaphoid and lunate; its rupture causes carpal instability and dorsal intercalated segment instability (DISI).