Subscapularis

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Historical reference: its only source is the original reference manual, and some of it may be out of date. Not used for AI answers until re-sourced.

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rotator-cuffsitsshouldersubscapularisinternal-rotation

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DefinitionA short reference note, not a full lesson.

Definition

The "S" of SITS; the internal rotator of the shoulder, also involved in extension and adduction.

Detail

The subscapularis is one of the four rotator cuff (SITS) muscles. Its functions are internal rotation and involvement in extension and adduction of the shoulder.

Key facts

Function 1: internal rotation.
Function 2: also involved in extension and adduction.

Connections

Rotator Cuff (SITS) — the SITS group.
Internal Rotation — primary function.
Adduction — also involved.
Extension — also involved.

Sources

Historical reference · reference manual (page cited)

p.84p.232

Cited authorities in source: Ellison (1991).

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Educational content only — not medical advice. Always consult a qualified professional for individualized guidance, especially around injury, pregnancy, or medical conditions.

Explore related topics

Subscapularis

Adduction Extension Internal Rotation Rotator Cuff (SITS)

Atlas Connections

Adduction

Movement of a body part toward the midline (axis) of the trunk.

Extension

Straightening a joint so the bones move apart.

Internal Rotation

Rotation with the axis of the bone turning toward the body (e.g., the humerus turned inward).

Rotator Cuff (SITS)Closely related

The four rotator cuff muscles — Supraspinatus, Infraspinatus, Teres minor, Subscapularis (SITS) — that rotate and stabilize the shoulder joint.