semispinalis cervicis (muscle)

sem·i·spi·na·lis cer·vi·cis (mus·cle)

[TA]
continuous with musculus semispinalis thoracis; origin, transverse processes of second to fifth thoracic vertebrae; insertion, spinous processes of axis and third to fifth cervical vertebrae; action, extends cervical spine; nerve supply, dorsal primary rami of cervical and thoracic spinal nerves.