The deep cervical vein accompanies its artery between the Semispinales capitis and colli.

It begins in the suboccipital region by communicating branches from the occipital vein

Occipital vein

The occipital vein begins as a plexus at the posterior aspect of the scalp from the external occipital protuberance and superior nuchal line to the back part of the vertex of the skull....

 and by small veins from the deep muscles at the back of the neck.

It receives tributaries from the plexuses around the spinous processes of the cervical vertebræ, and terminates in the lower part of the vertebral vein

Vertebral vein

The vertebral vein is formed in the suboccipital triangle, from numerous small tributaries which spring from the internal vertebral venous plexuses and issue from the vertebral canal above the posterior arch of the atlas....

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