400 - Arthokinematics or Assessory Motions Practice sheet 1...

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Arthokinematics or Assessory Motions Practice sheet 1. Have members of the group explain the concave and convex rules of joint motion. 2. Complete the following: Explaining the shapes of the articular surfaces, direction of roll and glide, and whether roll and glide are same or opposite. Bones and shapes Direction of Roll same or Direction of Or the moving bone opposite Glide a. shoulder abduction Humerus: convex superior opposite inferior Glenoid fossa: concave b. knee flexion Tibia:concave posterior same posterior Femoral condyles: convex c. hip extension Femoral head: convex posterior opposite anterior Acetabulum: concave d. ankle dorsi flexion Talus: convex anterior opposite posterior Tibia /fibula: concave e. elbow flexion Ulna: concave anterior same anterior Humerus: convex f. wrist extension Carpal bones: convex posterior opposite anterior Radius /ulna: concave g. index finger extension Prox. phalange: concave posterior same posterior 2 nd metacarpal head: convex h. shoulder external rotation Humerus: convex
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