ARTICULAR MOTIONS HIGH YIELD 1ST RAY Flashcards
1
Q
what is the first ray comprised of? what are these articulations?
A
1st metatarsal -1st cuneiform -2nd metatarsal 1st cuneiform -navicular -2nd cuneiform -2nd metatarsal
2
Q
what does the axis of the first ray pass through?
this angle?
A
anterior
lateral
plantar
45 degrees with frontal and sagittal planes and motions that happen in these two planes at a 1:1 ratio; slight angle from the transverse plane
3
Q
what are the first ray motions?
A
dorsiflex and everts (4-6 degrees)
planterflex and inverts (4-6 degrees)
4
Q
minimum range of motion for dorsiflexion and plantarflexion?
A
unknown
5
Q
why does the first ray dorsiflex? plantarflex?
A
removes excess strain from sesamoids during forefoot loading and eversion of calcaneus
for motion and to allow full 65-75 degree of dorsiflexion at 1st MPJ
