3 doctors weighed in:
Where is the posterior deltoid muscle?
3 doctors weighed in

Dr. Robert Purchase
Orthopedic Surgery
2 doctors agree
In brief: Back of shoulder
The deltoid is the fan shaped muscle that drapes over your shoulder. "posterior" is a commonly used medical term that basically means behind or the backside.
So the posterior deltoid is the portion of that fan shaped muscle that is on your back. See the red area of the attached picture.

In brief: Back of shoulder
The deltoid is the fan shaped muscle that drapes over your shoulder. "posterior" is a commonly used medical term that basically means behind or the backside.
So the posterior deltoid is the portion of that fan shaped muscle that is on your back. See the red area of the attached picture.
Dr. Robert Purchase
Dr. Robert Purchase
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