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Teres major
Other Terms:
Teres major muscle,
Musculus teres major,
Muscle grand rond
Muscle parts
None
Latin name
Musculus teres major
Latin muscle parts
None
Group
Shoulder joint muscle – intertubercular groove group
Etymology
In English, this muscle’s name means the larger round muscle. The Latin word teres means “round or rounded off.” The term major comes from the Latin maior meaning “greater.” As is typical in anatomical terminology, this comparative reference clues you into the fact that this is a larger version of a similar shaped smaller muscle.
Origin
Posterior surface of the inferior angle of the scapula
Insertion
Medial ridge of the intertubercular groove of the humerus.
Action
Medial rotation, adduction, and extension of the humerus – it is important to note, however, that the muscle is not active during any of these movements unless the arm has to overcome resistance. In an unloaded arm no movement at the shoulder joint recruits the teres major.
Nerve supply
Lower subscapular nerve (C5, C6, and C7)
Blood supply
Thoracodorsal artery; circumflex scapular artery; posterior circumflex humeral artery.
Latin
Musculus teres major
French
Muscle grand rond
