Name
Pronunciation
(lon-GIS-I-mus SER-vi-Kus)
Origin/Proximal Attachment
Transverse processes of thoracic vertebrae T1 to T5
Insertion/Distal Attachment
Transverse processes of cervical vertebrae C2-6
Action/Relevance
Extends & laterally flexes vertebral column
Innervation
Lower cervical & upper thoracic nerves
Notes
Situated medial to the Longissimus dorsi, arises by long thin tendons from the summits of the transverse processes of the upper four or five thoracic vertebrę, and is inserted by similar tendons into the posterior tubercles of the transverse processes of the cervical vertebrę from the second to the sixth inclusive.