VIBS 305 Chapter Notes - Chapter 2: Fibular Collateral Ligament, Trochlear Notch, Carpal Bones
11 Dec 2017
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*the tendons of the following muscles act as collateral ligaments (side-to-side stabilizers): supraspinatus (to a lesser extent), infraspinatus, and subscapularis. Cubital (elbow) joint: ginglymus or hinge joint, permits only the actions of flexion and extension. Carpal joint complex: corresponds to the human wrist, the joint capsule of the carpal joint fuses with the periosteum of the carpal bones. Three horizontal joints make up the complex: antebrachiocarpal joint: joint between the distal radius and ulna and the proximal row of carpal bones. This joint has a wide degree of separation when the bones are flexed. 60% of flexion and extension takes place at this joint: middle carpal joint: joint between the proximal and distal rows of carpal bones. This joint has a moderate degree of separation when the bones are flexed. 40% of the flexion and extension occurs at this joint: carpometacarpal joint: all the joints between the distal row of carpal bones and the proximal ends of the metacarpal bones.
