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Teres Minor Muscle

Teres minor (Musculus teres minor):

Attachments: (show/hide)

Origin: The middle part of the lateral (axillary) border of the scapula.

Insertion: (The inferior aspect of greater tubercle of the humerus.

 

Actions:

  • Laterally rotates the arm at the shoulder (glenohumeral) joint.
  • Weakly adducts the arm at the shoulder (glenohumeral) joint.
  • Helps stabilize the shoulder by drawing the humerus toward the glenoid fossa of the scapula.

Innervation:

Nerve to the muscle:
a. Axillary nerve.
Nerve roots:
a. C5 and C6.