Spine of scapula

Spine of Scapula

Spine of the scapula shown in red

The Spine of Scapula is a prominent bony feature on the scapula (shoulder blade) in the human body. It is a ridge that runs diagonally across the dorsal side of the scapula, dividing it into two regions: the supraspinous and infraspinous fossae.

Anatomy

The spine of the scapula starts from the medial border and extends towards the lateral border. It is a thin, flat bone that is roughly triangular in shape. The spine is elevated and forms a ridge that is palpable under the skin. It ends laterally in an enlarged, roughened area known as the Acromion.

Function

The spine of the scapula serves as an attachment site for several muscles, including the trapezius and deltoid. It also provides a boundary between the supraspinatus and infraspinatus muscles, which are part of the rotator cuff.

Clinical Significance

Injuries or abnormalities of the spine of the scapula can lead to shoulder pain and limited range of motion. Conditions such as scapular fractures or winged scapula can affect the spine of the scapula.

See Also

• Scapula
• Acromion
• Supraspinatus muscle
• Infraspinatus muscle
• Trapezius muscle
• Deltoid muscle