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Why is the suprasipatus muscle the most frequently involved muslce in rotator cuff injuries?
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Dr. Shawn Hennigan
Orthopedic Surgery
In brief: Blood supply
The supraspinatus is most commonly torn for a couple of reasons.
First, the tendon gets blood supply from attachment site on bone, and from muscle. Between these is a watershed area where blood supply is limited. Allows for more rapid tendon degradation. Next, it is subject to pathologic contact with the undersurface of the acromion, known as impingement.

In brief: Blood supply
The supraspinatus is most commonly torn for a couple of reasons.
First, the tendon gets blood supply from attachment site on bone, and from muscle. Between these is a watershed area where blood supply is limited. Allows for more rapid tendon degradation. Next, it is subject to pathologic contact with the undersurface of the acromion, known as impingement.
Dr. Shawn Hennigan
Dr. Shawn Hennigan
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