Category Archives for Anatomy

Wrist Extensors: Functional Anatomy Guide

The wrist extensors are a group of nine individual muscles on the back of the forearm that act on the wrist and fingers. Collectively, their primary function is wrist

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Posterior Deltoid: Functional Anatomy Guide

The posterior deltoid (L. posterior, behind ; deltoides, triangular) refers to the rear head of the three-headed deltoid muscle. It acts on the shoulder joint and is the

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Erector Spinae: Functional Anatomy Guide

The erector spinae (erigere, to erect ; spina, spine.) consists of three long, thin muscle groups running vertically up each side of the vertebral column: the iliocostalis,

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Internal Oblique: Functional Anatomy Guide

The internal oblique (L. internus, internal ; obliquus, oblique.) is a flat sheet of muscle on either the side of the lower torso. It gets its name from being beneath

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Pronator Teres: Functional Anatomy Guide

The pronator teres (L. pronus, lying face down ; teres, round and long.) is an elongated, cylindrical forearm muscle that crosses the gap between radius and ulna. It’s

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Lateral Deltoid: Functional Anatomy Guide

The lateral deltoid (L. latus, side ; deltoides, triangular) is the outermost head of the deltoid and is primarily responsible for performing shoulder abduction. The

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External Oblique Muscle: Functional Anatomy Guide

The external oblique (L. externus, external ; obliquus, oblique.) is a broad, flat sheet of muscle on either side of the abs. It is named after its location (external

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Transversus Abdominis: Functional Anatomy Guide

The transversus abdominis (L. transversus, crosswise  ; abdo, to hide.) is a flat layer of muscle in the abdomen, whose fibers run transverse relative to the midline

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Anterior Deltoid: Functional Anatomy Guide

The anterior deltoid (L. anterior, before, in front of ; deltoides, triangular) refers to the front head of the deltoid muscle. This part of the delt is responsible for

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Triceps Brachii: Functional Anatomy Guide

Literally meaning the three-headed muscle of the arm, the triceps brachii (L. tres, three ; caput, head ; brachium, arm.) consists of a long, lateral and medial head.

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