Medical Definition of Splenius muscle of neck
1.
Origin, from supraspinous ligament and spinous processes of third to fifth thoracic vertebrae; insertion, posterior tubercles of transverse processes of first and second (sometimes third) cervical vertebrae; action, rotates and extends neck; nerve supply, dorsal primary rami of fourth to eighth cervical spinal nerves.
Synonym: musculus splenius cervicis, musculus splenius colli, splenius muscle of neck.
(05 Mar 2000)
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