scalenus medius

In 3 atlases

one of the three pairs of muscles in the lateral neck

Source: Wikidata · Licence: CC0-1.0

Description from Wikidata (https://www.wikidata.org/), available under CC0 1.0 (https://creativecommons.org/publicdomain/zero/1.0/).

Origin: axis, third cervical vertebra, fourth cervical vertebra, fifth cervical vertebra, sixth cervical vertebra, seventh cervical vertebra
Insertion: first rib
Action: lateral flexion of the neck
Innervation: cervical plexus