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Author: Leslie Samuel

Finger Flexion

In this video, the motion of finger flexion is occurring at the metacarpophalangeal (MCP) and interphalangeal (IP) joints. This motion is controlled by concentric muscle contraction. Concentric metacarpophalangeal (MCP) and interphalangeal (IP) joint flexion is demonstrated starting with the arm at the side of the body and the palm facing forward in the anatomical position for the upper extremity and ending in a fully flexed position as seen from a side or lateral view.

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Finger Intrinsic Plus

In this video, the motion of the fingers beings at the extrinsic plus position with metacarpophalangeal (MCP) joint extension and interphalangeal (IP) joint flexion. The motion ends in the intrinsic plus position with metacarpophalangeal (MCP) joint flexion and interphalangeal (IP) joint extension as seen from a side or lateral view.

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Finger Adduction

In this video, the motion of bringing the fingers together is adduction. Adduction is occurring at the metacarpophalangeal joints. Metacarpophalangeal adduction is demonstrated from a position of the fingers being spread apart to a position of full adduction as seen from a front or anterior view.

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Finger Abduction

In this video, the motion of spreading apart the fingers is abduction. Abduction is occurring at the metacarpophalangeal joints. Metacarpophalangeal abduction is demonstrated from a position of the fingers being close together to a position of full abduction as seen from a front or anterior view.

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Finger Extension

In this video, the motion of finger extension is occurring at the metacarpophalangeal and interphalangeal joints. This motion is controlled by eccentric muscle contraction. Eccentric metacarpophalangeal and interphalangeal joint extension is demonstrated from a fully flexed hand position as seen from a side or lateral view.

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