A 25-year-old man with congenital abnormalities at bih has a lesion of the dorsal scapular nerve, making him unable to adduct his scapula. Which of the following muscles is most likely paralyzed?
Semispinalis capitis
Rhomboid major
Multifidus
Rotator longus
The rhomboid major is a superficial muscle of the back; is innervated by the dorsal scapular nerve, which arises from the ventral primary ramus of the fifth cervical nerve; and adducts the scapula. The semispinalis capitis, multifidus, rotator longus, and iliocostalis muscles are deep muscles of the back; innervated by dorsal primary rami of the spinal nerves; and have no attachment to the scapula.
Nerve supply, Nerve Lesions