The 3 groups of back muscles are organized in layers: superficial, intermediate, and deep.JM7 said:Are rhomboids & levator scapulae "superficial extrinsic back muscles" or "intermediate extrinsic back muscles"???? Is there a difference between "intermediate extrinsic back muscles" and "deep extrinsic back muscles"????
thanks for the reply. rhomboids major+minor are underneath trapezius. Aren't they part of the intermediate layer? I still think "deep extrinsic" is the same as "intermediate extrinsic." What does everyone else think?Jo23 said:The 3 groups of back muscles are organized in layers: superficial, intermediate, and deep.
Muscles of the superficial and intermediate groups are called extrinsic back muscles because they are involved in respiration and movements of the upper extremity. Muscles of the deep group are called intrinsic back muscles because they are involved in movement and stabilization of the vertebral column.
Hope this helps.