yogabook / muscles / scalenus medius
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M. scalenus medius
The scaleni are divided into three parts: in addition to the scalenus medius, there is also the scalenus anterior and the scalenus posterior.
Origin: Procc. transversi of HW 3 ? 7
Attachment: 1st rib
Innervation: ventral branches of spinal nerves from C4-7
Antagonists:
Movement: innervated on one side: Lateral flexion of the cervical spine; bilateral: Flexion of the cervical spine