The lesser tubercle of the
humerus
The humerus (; ) is a long bone in the arm that runs from the shoulder to the elbow. It connects the scapula and the two bones of the lower arm, the radius and ulna, and consists of three sections. The humeral upper extremity consists of a roun ...
, although smaller, is more prominent than the
greater tubercle
The greater tubercle of the humerus is the outward part the upper end of that bone, adjacent to the large rounded prominence of the humerus head. It provides attachment points for the supraspinatus, infraspinatus, and teres minor muscles, thre ...
: it is situated in front, and is directed medially and anteriorly.
The projection of the lesser tubercle is anterior from the junction that is found between the
anatomical neck and the
shaft of the humerus and easily identified due to the
intertubercular sulcus
The bicipital groove (intertubercular groove, sulcus intertubercularis) is a deep groove on the humerus that separates the greater tubercle from the lesser tubercle. It allows for the long tendon of the biceps brachii muscle to pass.
Structure ...
(Bicipital groove).
Above and in front it presents an impression for the insertion of the tendon of the
subscapularis
The subscapularis is a large triangular muscle which fills the subscapular fossa and inserts into the lesser tubercle of the humerus and the front of the capsule of the shoulder-joint.
Structure
It arises from its medial two-thirds and
Som ...
.
Additional images
File:Gray326.png, The left shoulder and acromioclavicular joints, and the proper ligaments of the scapula.
File:Human arm bones diagram.svg, Human arm bones diagram
References
External links
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Diagram at uwlax.edu
Bones of the upper limb
Humerus
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