Brief Answer: there are different muscles involved Detailed Answer: HI, thanks for using healthcare magic Myotomes are groups of muscles that are controlled or innervated by specific nerve roots such as the nerve roots that you mentioned - C4 to C7. (1)C4 - this is involved in elevation of the shoulder. The muscles involved aret trapezius and levator scapulae (2)C5-this is involved in abduction/flexion of the shoulder and flexion at the elbow. There are a number of muscles innervated including the biceps brachii, bracialis, deltoid,supraspinatus, infraspinatus, brachioradialis, pectoralis major (clavicular head). teres major, teres minor (3) C6 is involved in , adduction of the shoulder, flexion of the elbow as well , extension of the wrist, flexion of the wrist The muscles are teres major and teres minor, deltoid, triceps brachaii, extensor carpi radialis longus and brevis, flexi carpi radialis, (4) c7-involved in extension at the elbow, shoulder adduction, medial rotation of the shoulder, flexion and extension of the fingers, flexion and extension at the wrist. There are also a host of muscles involved. I hope this helps, feel free to ask any other questions

---

Brief Answer: there are web images Detailed Answer: Hi Unfortunately I am not able to attach images but if you place upper limb myotomes into google search engine and then click on images you will be able to find an image. In addition if you put grants atlas upper limb myotomes into the search engine you would also get images and ideas of the movements of the muscles. Please feel free to ask anything else

---