Lecture 16 Flashcards
What are the joints of the hand?
Carpometacarpal
Intermetacarpal
Metacarpophalangeal
Interphalangeal
Where is the radiocarpal joint?
Between the distal radius and scaphoid, lunate, triquetrum.
Where is the intercarpal joint?
Between the carpals in the proximal row and between the carpals in the distal row.
Where is the midcarpal (physiological/functional) joint?
Between the proximal and distal carpal rows.
What is the blood supply of the radiocarpal joint?
Branches of the palmar and dorsal arches.
What type of joint is the radiocarpal joint?
A condyloid joint.
What are the ligaments of the radioulnar joint?
Medial collateral
Lateral collateral
Palmar and dorsal radiocarpal
Palmar and dorsal radioulnar
What is the nerve supply of the radiocarpal joint?
Anterior/posterior interosseus nerve
Deep branch of ulnar nerve
What are the joints of the wrist?
Radiocarpal
Intercarpal
Midcarpal (physiological/functional)
What are the ligaments of the intercarpal joints?
Anterior
Posterior
Interosseous
What is the blood supply to the intercarpal joints?
Palmar and dorsal carpal arches
What is the nerve supply to the intercarpal joints?
Anterior interosseous
Deep branch of ulnar
What movement occurs at intercarpal joints?
Gliding between carpals
What movements occur at the midcarpal joint?
Flexion
Extension
Radial deviation
What are the ligaments of the carpometacarpal and the intermetacarpal joints?
Carpometacarpal
Intermetacarpal
Collateral (CMC only)
What is the blood supply of the carpometacarpal and intermetacarpal joints?
Palmar arterial arches.
Dorsal and palmar metacarpal arteries (between arches).
What is the nerve supply of the carpometacarpal and intermetacarpal joints?
Anterior and posterior interosseous nerves.
Deep ulnar nerve.
What is the blood supply of the metacarpophalangeal and interphalangeal joints?
Palmar arterial arch
What is the nerve supply of the metacarpophalangeal and interphalangeal joints?
Median nerve
Ulnar nerve
What are the ligaments of the metacarpophalangeal and interphalangeal joints?
Collateral ligaments
Transverse metacarpal ligaments - stops excessive abduction between digits
Palmar (volar) plate
Dorsal plate
What type of joint is the metacarpophalangeal joint?
Condyloid
What type of joint is the interphalangeal joint?
Hinge joint
What is skiers thumb and when does it occur?
Rupture of medial collateral ligament.
Occurs as a result of forced abduction and extension.
Adductor pollicis tendon can get impinged.
What is a ventral interphalangeal injury?
Volar plate ruptures causing hyperextension of the proximal IP joint and compensatory flexion at the distal IP joint.
Swan neck deformity.
What is a dorsal interphalangeal injury?
Dorsal plate rupture causing flexion at the proximal IP joint and compensatory extension at the distal IP joint.
Boutonnière deformity
Button
What is a distal interphalangeal injury?
Extension expansion ruptures causing hyperflexion of the distal IP joint.
Mallet finger
What are the fibrous flexor sheaths?
Annular fibres:
Found at joints
Cruciform fibres:
Criss cross
Keep annular fibres apart
Together they provide a tunnel for tendons to travel through when the phalanxes are extended.
