Adductor pollicis muscle
Adductor pollicis muscle
The Adductor pollicis muscle (pronounced: ad-DUK-tor POL-ih-sis MUH-suhl) is a key muscle in the human hand. It is responsible for the adduction of the thumb, meaning it brings the thumb towards the palm of the hand.
Etymology
The term "Adductor pollicis muscle" is derived from Latin, with "adductor" meaning "to draw towards," "pollicis" referring to the thumb, and "muscle" denoting a tissue composed of cells or fibers.
Anatomy
The Adductor pollicis muscle is a large, triangular muscle located in the hand. It is divided into two sections: the transverse head and the oblique head. The transverse head originates from the third metacarpal, while the oblique head originates from the capitate and bases of the second and third metacarpals. Both heads insert into the base of the proximal phalanx and the ulnar sesamoid.
Function
The primary function of the Adductor pollicis muscle is to adduct the thumb. This means it brings the thumb towards the palm of the hand, allowing for a strong grip and precision movements. It also assists in flexion and opposition of the thumb.
Related Terms
- Adduction: The movement of a body part towards the midline of the body.
- Thumb: The first digit of the human hand, located next to the index finger.
- Metacarpals: The five bones in the hand that connect the fingers to the wrist.
- Phalanx: Any of the bones of the fingers or toes.
See Also
External links
- Medical encyclopedia article on Adductor pollicis muscle
- Wikipedia's article - Adductor pollicis muscle
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