The convex-concave rule is the basis for determining the direction of the mobilizing force when joint mobilization gliding techniques are used to increase a certain joint motion. The direction in which sliding occurs depends on whether the moving surface is concave or convex.

Why is there a convex-concave rule? Its all about which bone contains the axis of rotation. In a convex bone (humeral head) it rotates around the axis which is WITHIN its head. In a concave bone the axis is inside the other ‘fixated’ bone.

Convex-Concave Morphology vs. Capsular Obligate Translation • At end range, asymmetrical capsular mobility causes obligate translation away from the side of tightness • Tight capsular structures will cause early and excessive accessory motion in …

2012年2月1日 · The convex-concave rules purportedly help describe the roll-and-slide relationships that naturally occur between moving articular surfaces. There are 2 components of this rule, depending on whether the convex or concave articular member of the joint is considered the moving segment.

2020年7月25日 · The concave-convex rule by Kaltenborn tells us which part of the joint capsule is stressed when we move an adjacent joint partner: When a convex joint surface is moving, the roll and glide occur in the opposite direction.

2023年8月10日 · What is the concave-convex rule in physiotherapy? According to the convex-concave rule, the preferred direction of a manual glide to improve external rotation is anterior. This logic is appropriate with a simultaneous anterior slide and posterior roll during humeral head external rotation.

Let’s visualize the “convex on concave” rule of joint arthrokinematics. First, grab a ball or a balled up piece of paper. Then roll the ball along your palm, starting at the base of your palm and moving up toward your fingertips.

2016年6月5日 · CONVEX–CONCAVE RULE. Anatomically, all articular surfaces are either convex or concave, 4,21 although the surfaces of some joints are not overtly of either shape. In these cases, fibrocartilage enhances and modifies the contour of the joint surfaces.

The convex–concave rule, introduced by Kaltenborn into manual therapy, is a didactic simplification of the lever law, during rotatory movements of the joints.

2009年1月11日 · The convex–concave rule, introduced by Kaltenborn into manual therapy, is a didactic simplification of the lever law, during rotatory movements of the joints. Movement of a convex bone corresponds to movement of a lever with two arms (=convex rule) and movement of a concave bone to a movement of a lever with one arm (=concave rule).