How Do You Spell MUSCULUS EXTENSOR INDICIS PROPRIUS?

1. The musculus extensor indicis proprius refers to a specific muscle in the human hand. The term "musculus" originates from Latin, meaning "muscle," while "extensor" indicates its function of extending or straightening a body part. "Indicis" is derived from the Latin word "index," meaning "forefinger" or "pointing finger." Lastly, "proprius" translates to "one's own" or "exclusive." Therefore, the musculus extensor indicis proprius can be understood as the muscle responsible for extending and straightening the index finger.

   This muscle is located in the posterior compartment of the forearm, originating from the dorsal surface of the ulna, one of the two forearm bones. It extends along the forearm and attaches to the index finger, specifically the tendon that extends from the index finger's middle phalanx (the bone furthest from the fingertip). When this muscle contracts, it causes the index finger to extend, enabling pointing or gesturing.

   The musculus extensor indicis proprius works in coordination with other muscles in the hand to facilitate fine motor movements, allowing for precise control and manipulation of objects. Its exclusive function in extending the index finger distinguishes it from other muscles involved in hand movement. Understanding the anatomy and functions of this muscle is essential in fields such as anatomy, physiology, medical sciences, and physical therapy, where knowledge of hand and finger movement is crucial.

2. M. Extensor indicis. indicator muscle; origin, dorsal surface of ulna; insertion, dorsum of 1st phalanx of index finger; nerve supply, radial; action, assists in extending the forefinger.

   A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.

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