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Semispinalis capitis

Other Terms: Musculus semispinalis capitis, Muscle semi-épineux de la tête

Muscle parts

None

Latin name

Musculus semispinalis capitis

Latin muscle parts

None

Group

Epaxial muscle – Transversospinales – Semispinalis

Etymology

The English name for this muscle is the half vertebral cloumn muscle of the head. The word semispinalis comes from the combined Latin word semis meaning “half” and spinalis comes from the Latin spina meaning “thorn.” This term was applied to pointed projections and in the 14th century was applied to the vertebral column with all its palpable spinous processes that form the dorsal line of the backbone. The word capitis comes from the Latin caput meaning “head.”

Origin

Tips of transverse processes of C7 to T6 and articular tubercle of C4 to C6

Insertion

Medial part of the area between the superior and inferior nuchal lines on the occipital bone

Action

Extends the head; weak rotation of head to opposite side.

Nerve supply

Dorsal rami of cervical and thoracic spinal nerves (C2 to T6)

Blood supply

The lateral cervical portion of the muscle receives a blood supply from the deep cervical artery, which arises from the costocervical trunk of the subclavian artery and the descending branch of the occipital artery, which forms an anastomosis with the deep cervical artery.

Latin

Musculus semispinalis capitis

French

Muscle semi-épineux de la tête

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