Longissimus capitis
A narrow column reaches from the side of the lower neck and upper spine to the skull behind the ear.
Attachments & illustration source
Lower cervical articular/upper thoracic transverse process region to posterior mastoid process.
Original anatomical illustration. Fine attachment boundaries are simplified.
UAMS Department of Neuroscience — Muscles of the Back RegionElliott et al. (2018), cervical musculature anatomical cross-reference