Adductor pollicis muscle
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Adductor Pollicis Muscle
The Adductor Pollicis Muscle is a large triangular muscle located in the hand. It is responsible for the adduction of the thumb and plays a crucial role in the human grip.
Anatomy
The Adductor Pollicis Muscle is composed of two heads: the transverse head and the oblique head. The transverse head originates from the third metacarpal bone, while the oblique head originates from the bases of the second and third metacarpals, the capitate bone, and the base of the second and third metacarpal bones. Both heads converge to insert into the base of the proximal phalanx and the extensor hood of the thumb.
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. It also assists in flexion and opposition of the thumb.
Clinical Significance
Damage or injury to the Adductor Pollicis Muscle can result in a weakened grip and reduced thumb mobility. Conditions such as carpal tunnel syndrome can affect the function of this muscle.
See Also
References
- Gray, Henry. Anatomy of the Human Body. Philadelphia: Lea & Febiger, 1918; Bartleby.com, 2000. www.bartleby.com/107/.
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