The muscle among the intermediate layer of back muscles is the rhomboids. The rhomboids consist of two muscles: rhomboid major and rhomboid minor. These muscles are located deep to the trapezius muscle and superficial to the erector spinae muscles in the back.
Here's a breakdown of the muscles listed in the question and their layers in the back:
1. Latissimus dorsi: This muscle is located in the superficial layer of back muscles.
2. Levator scapulae: This muscle is positioned in the deep layer of back muscles.
3. Rhomboids: The rhomboids, including the rhomboid major and rhomboid minor, are part of the intermediate layer of back muscles.
4. Serratus posterior superior: This muscle is not among the intermediate layer of back muscles; it is located in the superficial layer.
5. Trapezius: The trapezius muscle is situated in the superficial layer of back muscles, above the rhomboids in the intermediate layer.
In summary, among the muscles listed, the rhomboids are the ones found in the intermediate layer of back muscles.
