Teres minor

  • The teres minor (Latin: musculus teres minor) is a round muscle in the shoulder, which belong to the rotator cuff muscles.

    Origin

    The teres minor muscle arises from the lateral border of the scapula.

    Insertion

    The fibers of the teres minor pass laterally to the humerus and insert onto the greater tubercle of the humerus.

    Action

    The teres minor stabilizes the glenohumeral joint and provides external rotation and extension of the upper arm.

    Innervation

    The teres minor is innervated by the axillary nerve (C5).

    Blood supply

    The arterial blood to the teres minor is supplied mainly by the circumflex humeral arteries.