13 - finger movements Flashcards
interphalangeal joints
bicondylar
matecarpophalangeal joints
larger plamar plate
digit 1 - bicndylar = uniaxial
digits 2-5 - condylar = biaxial
digit 1 carpometacarpal joint
saddle joint
digits 2 and 3 carpometacarpal joints
interlcking facets - fixed and strong
digits 4 and 5 carpometacarpal joints
flattened faucets - more flexible than 2 and 3
effect of planar shape on movement
small movements in any direction
type of joint of intercarpal joints
interlocking planar
abduct
take away from the midline
adduct
brng back to the midline
flexor digitorum profundus goes through
flexor digitorum superficialis
palmaris longus
inserts into base of proximal phalanx
tandon fans out to form the palmar aponeurosis
flexor digitorum superficialise inserts intp
middle phalanx
flexor digitorum profundus
passes through gap in FDS tendon
inserts into distal phalanx
lumbricals
originate from FDP tendon, insert into extensor expansion
palmar interssei
adductors
dorsal interossei
abductor
hypothenar muscles
ulnar nerve
fleshy mass of muscle at the base of the little finger
thenar muscles
median nerve
fleshy mass of muscle at the base of the thumb
snuff box
area formed by tendons
dorsal tendons of extrinsic muscles thaat extend and abduct thumb
extensor pollicis longis and brevis
abductor pollicis longus
carpal tunnel
carpal canal roofed by flexor retinaculum of wrist
carpal tunnel syndrome
inflammation of tendons in the wrist and compression of the nerve