scalenus Definition

any of usually three deeply situated muscles on each side of the neck of which each extends from the transverse processes of two or more cervical vertebrae to the first or second rib:

one arising from the transverse processes of the third to sixth cervical vertebrae, inserting on the scalene tubercle of the first rib, and functioning to bend the neck forward and laterally and to rotate it to the side —called also anterior scalene, scalenus anterior, scalenus anticus

one arising from the transverse processes of the lower six cervical vertebrae, inserting on the upper surface of the first rib, and functioning similarly to the scalenus anterior —called also middle scalene, scalenus medius

scalenus

scalenus

a complex of symptoms including pain and numbness in the region of the shoulder, arm, and neck that is caused by compression of the brachial plexus or subclavian artery or both by the scalenus anticus muscle

scalenus

scalenus