Name
Pronunciation
(il-e-o-kos-TA-lu s SER-vi-kis)
Origin/Proximal Attachment
Angles of ribs 2-6
Insertion/Distal Attachment
Transverse processes of C4-6
Action/Relevance
Extends, laterally flexes & assists in rotation of lower cervical & upper thoracic vertebrae
Innervation
Lower cervical & upper thoracic nerves
Notes
Arises from the angles of the third, fourth, fifth, and sixth ribs, and is inserted into the posterior tubercles of the transverse processes of the fourth, fifth, and sixth cervical vertebrę.