longissimus capitis (muscle)
(redirected from musculus trachelomastoideus)lon·gis·si·mus ca·pi·tis (mus·cle)
[TA]intermediate erector spinae muscle in neck; origin, from transverse processes of upper thoracic and transverse and articular processes of lower and middle cervical vertebrae; insertion, into mastoid process; action, keeps head erect, draws it backward or to one side; nerve supply, dorsal primary rami of cervical spinal nerves.