Spinalis capitis is the cranial extension of the spinalis column, often blending with semispinalis capitis. It is inconstant in its presence.
| Origin | Spinous processes of C7 and T1 |
|---|---|
| Insertion | Occipital bone between superior and inferior nuchal lines |
| Nerve Supply | Dorsal rami of cervical spinal nerves (C2-C3) |
| Blood Supply | Occipital artery |
| Actions | Extends the head on the neck; Ipsilateral lateral head flexion |
|---|
Part of the deep nuchal musculature relevant in posterior skull base surgery. Denervation contributes to suboccipital pain syndromes and post-surgical headache.
Palpable as the deepest layer of the central nuchal mass during resisted head extension.
Deep nuchal muscle involvement contributing to suboccipital headache, managed by suboccipital muscle release and occipital nerve block.
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