Wrist anatomy Flashcards
what is the site of De quervain’s syndrome
Tenosynovitis of Abductor pollicis longus and Extensor pollicis brevis
Tunnel of Guyon
Pisiform (Flexor carpi ulnaris insertion), Hook of the Hamate, Pisohamate ligament (Ulnar nerve and artery - pulse felt proximate and lateral to pisiform bone)
Anatomy snuff box
Lateral border = abductor pollicis longus and extensor pollicis brevis
Medial border = extensor pollicis longus
Floor = scaphoid
Radial artery
most important ligament in the hand
radioschapholunate ligament, most commonly injured, maintains carpal stability
Injured with wrist extension, ulnar deviation and intercarpal supination
parlmar and dorsal ligaments, which are stronger?
parlmer
what gives stability for wrist?
triangular cartilaginous disc
which bone is the central keystone for proximal transverse arch
capitate
where is the stability point for distal longitudinal and transverse arch
2 and 3rd metacarpophrangeal
no man’s land in the hand
region between the distal palmar crease and the mid portion of the middle phalanx of the fingers. Damage to this region has very poor prognosis
reflex neurovascular syndrome is also called
complex regional pain syndrome, reflex sympathetic dystrophy, shoulder-hand syndrome and sudeck atrophy
Bouchard nodes
osteoarthoritis swelling of proximal interphalangeal joint
Heberden nodes
osteoarthoritis, swelling of distal interpharangeal joint
Ulnar drift
common deformities occuring in rheumatoid arthritis
Swan neck deformity
RA. Flexion of the metacarpohalangeal and distal interphalangeal, but extension of the proximal interphalangeal joint
ape hand
wasting of thenar eminance of hand. Median nerve palsy
Bishop’s hand or benediction hand defority
wasting of the hypothenar mm of the hand, ulnar nerve. Felxion of the 4th and 5 fingers
Butonniere deformity
extension of metacarpophalangeal and distal interphalangeal joint and flexion of the proximal interphalangeal joint. Result of a rupture of the central tendinous slip of the extensor hood and is most common for RA
Myelopathy hand
inability to extend and adduct the ring and little finger despite good function of the wrist, thumb and index finger. Exaggerated triceps reflex. Due to cervical spinal cord pathlogy in conjunction with cervical spondylosis
trigger finger
digital tenovaginitis stenosans
result of a thickening of the flexor tendon sheath (notta’s nodule) which causes sticking of the tendon when the patient attempts to flex the finger
zig zag deformity of the thum
flexed carpometacarpal joint and hyperextended at the metacarpophalangeal joint. Raptured extensor pollicis longus
volkmann ischemic contracure
typical of a compartment syndrome after a fracture or dislocation of the elbow (wrist flexion and clawed fingers)
4 types of power grips
hook, cylinder, fist, spherical
3 types of precision (prehension)grips
chuck or three fingered pinch (digital prehension)
Lateral or key pinch (lateral prehension)
Tip pinch (tip to tip prehension)