Posterior Wrist and Dorsum of the Hand

Anatomy

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Data 2fimages 2fnscd1xirpkx9etzlmtrk 190124 s0 osama muhammad posterior wrist and dorsum of the hand intro
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Posterior Wrist and Dorsum of the Hand
Data 2fimages 2f73wbiagrfodpza6ey5pq 190124 s1 osama muhammad bones and joints
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Bones and Joints
Data 2fimages 2f48amvhgat4gc3cocgmtm 190124 s2 osama muhammad extrinsic muscles acting at wrist
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Extrinsic Muscles Acting At Wrist
Data 2fimages 2fgpm1n9frxm4mgfkrytsq 190124 s3 osama muhammad extrinsic muscles acting at digits
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Extrinsic Muscles Acting At Digits
Data 2fimages 2f0bjcd0ebsts4ufaxd3d4 190124 s4 osama muhammad intrinsic muscles and connective tissues
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Intrinsic Muscles and Connective Tissues
Data 2fimages 2fwsa4r89shazbwxegdpjd 190124 s5 osama muhammad blood and nerve supply
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Blood and Nerve Supply

Lecture´s Description

The extrinsic extensor muscles of the hand are located in the back of the forearm and have long tendons connecting them to bones in the hand, where they exert their action. The extensor carpi radialis longus (ECRL) originates just distal to the brachioradialis at the lateral supracondylar ridge of the humerus, the lateral intermuscular septum, and by a few fibers at the lateral epicondyle of the humerus.

Distal to this, the extensor carpi radialis brevis, extensor digitorum, extensor digiti minimi, and extensor carpi ulnaris originate from the lateral epicondyle via the common extensor tendon. The abductor pollicis longus is one of the extrinsic muscles of the hand and its major function is to abduct the thumb at the wrist. Extensor retinaculum is a fibrous band traversing the wrist on the posterior side in a horizontal mediolateral direction.

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