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Movements of the Wrist and Hand. Thirty-four muscles act on the hand. Intrinsic muscles of the hand contain the origin and insertions within the carpal and metacarpal bones. Muscles originating in the forearm are the extrinsic muscles of the hand.
12 Ιουν 2023 · Hand and wrist muscles Muscles are soft tissue made of stretchy fiber. Intrinsic muscles inside your hand work with extrinsic muscles near the outside of your hand and in your forearm to give your hand its strength and dexterity.
27 Σεπ 2024 · The muscles that act on the hand can be divided into two groups: Extrinsic muscles – located in the anterior and posterior compartments of the forearm. They control crude movements and produce a forceful grip. Intrinsic muscles – located within the hand itself. They are responsible for the fine motor functions of the hand.
Muscles associated with the wrist include those of the forearm and hand that move the wrist and digits. The wrist and hand exhibit a remarkable range of movement, key for grasping and interaction with objects.
13 Νοε 2023 · Learn everything about hand and wrist anatomy using this topic page. Click now to study the bones, muscles, arteries, and nerves of the hand at Kenhub!
Lumbricals. The lumbricals are a group of 4 narrow muscles in the metacarpal area of the hand. These are attached to the 2nd to 5th digits of the hand, helping with finger flexion and extension. Interossei. The interossei are small, worm-like muscles located between the metacarpal bones.
The muscles of the hand are innervated by the radial, median, and ulnar nerves. The radial nerve innervates the finger extensors and the thumb abductor; that is, the muscles that extend at the wrist and metacarpophalangeal joints (knuckles) and abduct and extend the thumb.
