Hand and wrist anatomy review The hand and wrist are complex structures composed of numerous bones, joints, muscles, tendons, and ligaments, all working together to provide a wide range of motion and functionality.
Hand and wrist anatomy review The hand and wrist are complex structures composed of numerous bones, joints, muscles, tendons, and ligaments, all working together to provide a wide range of motion and functionality. The wrist contains eight small carpal bones arranged in two rows, connecting the forearm's radius and ulna to the wrist and distally, the 14 phalanges that make up the fingers. These bones are supported by joints such as the carpometacarpal, metacarpophalangeal, and interphalangeal joints, which allow movements like flexion, extension, abduction, and adduction.
Muscles and tendons, including the flexor and extensor groups, enable fine motor skills and grip strength, while ligaments maintain stability. This intricate design allows the hand and wrist to perform precise and powerful actions essential for daily activities. This post will review all of the anatomy of the hand and wrist.
The superficial extensor muscles of the hand and wrist Some of the intrinsic muscles of the hand The wrist and hand muscles can be broken down into intrinsic and extrinsic muscles. The extrinsic muscles of the hand are divided into flexor/pronator and extensor/supinator groups, as well as muscles specifically dedicated to thumb movement. The flexor/pronator group includes the flexor carpi radialis, palmaris longus, flexor carpi ulnaris, flexor digitorum superficialis, flexor digitorum profundus, and pronator quadratus, all of which contribute to flexion and pronation of the wrist and fingers.
The extensor/supinator group consists of the extensor carpi radialis longus, extensor carpi radialis brevis, extensor digitorum, extensor digiti minimi, extensor carpi ulnaris, and extensor indicis, which facilitate extension and supination. Additionally, the extrinsic muscles of the thumb include the flexor pollicis longus, extensor pollicis longus, extensor pollicis brevis, and abductor pollicis longus. The intrinsic muscles include the following.
The thenar muscles , including the abductor pollicis brevis, flexor pollicis brevis, and opponens pollicis, are located at the base of the thumb and facilitate thumb movement and opposition. The hypothenar muscles , comprising the opponens digiti minimi, flexor digiti minimi brevis, and abductor digiti minimi, control the movements of the little finger. The inter-digital group includes the lumbricals, which assist in flexing the fingers at the metacarpophalangeal joints and extending them at the interphalangeal joints, as well as the dorsal and palmar interossei, which enable finger abduction and adduction.
If you are experiencing symptoms that may be related to hand and wrist anatomy review, it is important to see a sports medicine physician. Early evaluation and treatment typically lead to better outcomes. Do not ignore pain or symptoms that are limiting your activity.
*This article is for educational purposes only and does not substitute for professional medical advice. Always consult a qualified healthcare provider.*
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