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Laboratory 1. Muscles of the Back
Step 6. Rhomboid, Major and Minor, and Levator Scapulae Muscles

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Identify the rhomboid major muscle [upper forceps], rhomboid minor muscle, and levator scapulae muscle (Figure 1.4). Next, detach the rhomboid major and minor muscles from their attachments to the spinous processes of the C7 to T5 vertebrae and reflect them laterally. Finally, find the dorsal scapular nerve and the accompanying branches of the transverse cervical vessels that lie on the deep surfaces of the levator scapulae and rhomboid muscles.

Links and References:
Grant's: 4.48 and 4.58
Netter: 161 and 163
Rohen/Yokochi: 212 and 221