yogabook / muscles / scalenus anterior
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M. scalenus anterior
The scaleni are divided into three parts: in addition to the scalenus anterior, there is also the scalenus medius and the scalenus posterior.
Origin: processus transversi of HW 3-6
Attachment: Tuberculum musculi scaleni anterioris of the 1st rib
Innervation: ventral branches of spinal nerves from C5-7
Antagonists:
Movement: innervated on one side: Lateral flexion of the cervical spine; bilateral: flexion of the cervical spine; inspiration by lifting the 1st rib