The splenius cervicis curves forwards and is inserted, by tendinous slips, into the transverse processes of the upper two or three cervical vertebrae behind the levator scapulae, which overlaps it and excludes it from the floor of the posterior triangle.
The splenius capitis passes under cover of the upper part of the sterno-mastoid muscle, and gains insertion into the lower part of the mastoid process of the temporal bone and into the lateral portion of the superior nuchal line.
The splenius bends the head and neck backwards and turns them towards its own side. It is supplied by the posterior primary rami of the cervical nerves, and is pierced by their cutaneous branches.
Related category ANATOMY AND PHYSIOLOGY
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