SAR HS 369 Lecture Notes - Lecture 9: Phalanx Bone, Metacarpal Bones, Osteology
2 Jul 2020
School
Department
Course
Professor
Document Summary
As with other regions we will study: osteology, articulations and supporting structures, functional hand use: prehension, musculature, extrinsic muscles, related supporting structures: flexor sheath, related supporting structures: extensor hood, intrinsic muscles, intrinsic and extrinsic muscle balance: power grip. Osteology of the digits metacarpals and phalanges. The metacarpals are named starting on the thumb side as the first one, and they are named numerically to the fifth. The first digit (the thumb) has two bones distal do those are the phalanx bones: proximal and distal. For digit 2 through 5 there are three phalanx bones proximal, middle and distal. A very common clinical correlation associated with the osteology of the hand is the boxers fracture, which is a fracture of the fifth metacarpal. Carpometacarpal: cmc, saddle/gliding, the first cmc joint (at the thumb) is a saddle joint. It is fairly mobile and it can move on two planes: the remainder of the cmc joints 2-5 are simple gliding joints.
