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The teres minorLateral rotator Small muscle below infraspinatus; rotates arm outward. muscle is a relatively small yet essential muscle located in the posterior shoulder.
Photography, text, and labels by Rob Swatski, Assistant Professor of Biology, Harrisburg Area Community College – York Campus, York, PA.
Origin
The teres minor muscle originates from the lateral borderEdge closest to the armpit; thicker and near the glenoid fossa. of the scapulaTriangular “shoulder blade” on posterior thorax; connects clavicle and humerus.. It specifically originates from the upper two-thirds of the lateralAway from the midline of the body. border and the corresponding posterior surface.
Insertion
The teres minor inserts onto the greater tubercleLarge bump lateral to the head; muscle attachment site. of the humerusLong bone of the upper arm; articulates with scapula at shoulder and radius/ulna at elbow.. This is one of the bony prominences of the upper arm bone.
Actions
Lateral Rotation of the Shoulder
Stabilization of the Shoulder Joint
Interactive Materials
Use this 3D Viewer to Explore the Muscles of the Upper Body
“Open3DModel – Upper limb – English labels” by Open3D project, Jan Kooloos, RadboudUMC, Eungyeol Lee, LUMC et al, license: CC BY-SA
Identify More Muscles
Link to more Muscle Identification
Upper Arm Muscles
Forearm Muscles
Calf Muscles
Anterior Thigh Muscles
Posterior Thigh Muscles
Knee Structures
Chest Muscles
Back Muscles
Abdominal Muscles
Neck Muscles
Head Muscles
List of terms
- teres minor
- anatomy
- lateral border
- scapula
- lateral
- greater tubercle
- humerus