ANTHROP 3FA3 Lecture Notes - Lecture 22: Comminution, Metacarpal Bones, Blunt Force Trauma (Album)

• School: McMaster University
• Department: Anthropology
• Course: ANTHROP 3FA3
• Professor: Rebecca Gilmour

Document Summary

Crush and compression fractures: compression forces, typical in vertebral bodies (esp after bone loss, also joint surfaces. Oblique fractures: shearing forces, usually from falling on a out stretched hand. Spiral factures: torsion force, single or paired bones. Comminuted fracture: 3+ fragments, higher energy injury, e. g. car crash, impact wound. Avulsion fracture: tension force that rips away a bit of bone. Mechanism of trauma: the type of force that caused an injury, projectile, blunt force, sharp force, thermal, a combination. Hat brim line: fractures above the hat brim line (hbl) are more likely the result of a blow, fractures at the hbl can easily be caused by falls, more difficult to distinguish. Blunt force tool impressions: consider the size & shape of the fracture, angle of blow will change fracture shape. 2: not conclusive, but may consistent with. Tool impressions: hammers: may also be harp force trauma, note: shape, similarity.