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Mm. scaleni
The scaleni are divided into three parts: scalenus anterior, scalenus medius, scalenus posterior.
Origin: processi transversii of HW 2-7
Attachment: rib 1 or 2
Innervation: ventral branches of Spinalnerven C4 to C8
Antagonists:
Movement: Pulling down and turning the neck, anterior: Lifting the 1st rib to inhale