Extensor medii proprius muscle

Extensor medii proprius muscle is a muscle in the human body that is part of the extensor group of muscles. The term "extensor medii proprius" is derived from Latin, with "extensor" meaning "to stretch out", "medii" meaning "middle", and "proprius" meaning "own" or "proper". This muscle is unique to humans and is not found in other primates.

Anatomy

The extensor medii proprius muscle is located in the forearm and is responsible for the extension of the middle finger at the metacarpophalangeal joint. It originates from the common extensor tendon, which is attached to the lateral epicondyle of the humerus. The muscle then runs down the forearm and inserts into the base of the middle finger.

Function

The primary function of the extensor medii proprius muscle is to extend the middle finger. This action is crucial for many everyday tasks, such as typing, gripping objects, and making certain hand gestures. The muscle also assists in the extension and abduction of the wrist.

Clinical significance

Injury or damage to the extensor medii proprius muscle can result in loss of function or mobility in the middle finger. This can significantly impact a person's ability to perform tasks that require fine motor skills. Treatment for such injuries typically involves physical therapy and, in severe cases, surgery.

See also

• Extensor muscles
• Forearm
• Metacarpophalangeal joint
• Common extensor tendon
• Humerus

Extensor medii proprius muscle Resources
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