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Anatomy and function of the thenar muscles
Salil Gupta1, Heidi Michelsen-Jost
1Department of Orthopedic Surgery, NYU-Hospital for Joint Diseases, 95 University Place, 8th Floor, New York, NY 10003, USA. salilnyc@hotmail.com
Hand Clinics
|November 29, 2011
Summary
The four intrinsic muscles of the thumb enable its complex movements. These muscles coordinate to allow for both precise pinching and powerful gripping actions.
Area of Science:
- Anatomy
- Biomechanics
- Kinesiology
Background:
- The thumb's unique mobility is crucial for human dexterity.
- Intrinsic thumb muscles are key to hand function.
Purpose of the Study:
- To detail the four intrinsic muscles of the thumb.
- To explain their role in thumb movement and function.
Main Methods:
- Anatomical review of the thenar muscles.
- Functional analysis of thumb musculature.
Main Results:
- The four intrinsic thumb muscles are abductor pollicis, adductor pollicis, opponens pollicis, and flexor pollicis brevis.
- Coordination of these muscles facilitates thumb motion.
Conclusions:
- The intrinsic thumb muscles are essential for functional hand activities.
- These muscles enable dynamic control for precision and power grips.
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