tarsal joint Flashcards
pronation and supination with heel fixed
occurs at tansverse tarsal j
pronation and supination with heel free
occurs at both transverse tarsal and subtalar joint
articular facets on calcaneous
promote gliding motion
- ant
- post
- middle
interosseus talocalcaneal lig
keeps talus and calc bound together
restrains excessive eversion and inversion
cervical lig
same function as interosseus lig
movement at subtalar joint
DF and PF eliminated, pronation and supination only have 2 components
transverse tarsal joints allow you to
walk on uneven surfaces
transverse tarsal joint mvmt
pronation: less stable, permits flex/ext of forefoot
supination: stable, locks foot
all 3 components
transverse tarsal joint components (2)
talonavicular
calcaneocuboid
talonavicular J
ball and socket, strengthened by spring lig
calcaneocuboid j
planar, strengthened by long and short plantar ligs
long and short planar ligs
support calcaneocuboid joint
reinforce lateral longitudinal arch
spring lig
supports talonavicular joint
reinforces medial longitudinal arch
weakness–>pes planus (flat foot)
tarsometatarsal joint
transverse arch
limited motion
planar
metatarsophalangeal joint
condyloid
flex/ext ad/abduction
interphalangeal j
synovial hinge
flex/ext
pes planus
flattening on med long arch
overstretched and weak spring lig
pes cavus
exaggerated high arch
tightness in intrinsic foot m’s, plantar fascia,
overaxctiv fib longus and weak ant comp muscles
pes valgus
forefoot abducted
arthritis or weakness in tin ant or post m’s
pes varus
forefoot adducted
weakness in fib longus and brevis
deep fibular and tibial n damage
inability to supinate
tib ant and post m’s
L4 radiculopathy
superficial/common fib n damage
inability to pronate
fib longus and brevis
S1 radiculopathy
primary supinators at tarsal J
tibialis ant: deep fib n
tibialis post: tibial n
L4
primary supinator of the foot
tibialis posterior
