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Per Criswell 2011 Shoulder Left

M. Teres Major

Teres Major (Teres Maj L)

The M. Teres Major (Teres Major) is a muscle of the shoulder region. It is responsible for retroversion, adduction and internal rotation at shoulder joint. This muscle is not covered by the official SENIAM catalogue — placement is based on established clinical literature. This page documents the exact electrode position, anatomical attachments and a standardized test movement based on Hermens et al. (2000).

Function

Retroversion, adduction and internal rotation at shoulder joint

Opposite side: Teres Maj R
Rotate the body, see the electrode position in place — and check the neighbouring muscles right away. View in 3D Viewer

Anatomy

Origin Inferior angle of scapula (dorsal surface) Insertion Crest of lesser tubercle of humerus

Test Movement

Internal rotation of arm against resistance with adducted arm

This muscle has no SENIAM-standardized electrode position. Placement should be based on anatomical knowledge.

Measure M. Teres Major activity live

The electrode is placed — what next? easyEMG visualises muscle activity in real time, with SENIAM-compliant placement guidance, up to 4 channels at once and biofeedback training right afterwards.

In rehabilitation, the Teres Major is typically recorded to track progress and retrain activation.

Related Muscles in This Region

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EMG Guide as PDF — free
40 muscle protocols (SENIAM + peer-reviewed) on 80 pages, print-ready.