Splenius capitus PA (Origin)
Lower ½ lig nuchae, SP C7‐T3(4) & their supraspinous ligs

Splenius capitus DA (Insertion)
Mastoid process & rough surface below lat 1/3 of sup nuchal line

Splenius capitus innervation
Lateral branches of posterior rami of middle cervical spinal nerves

Splenius capitus blood supply
Br. off the external carotid

Splenius capitus actions
<answer>
Unilaterally: ipsilateral rot. &amp; SB neck

Bilaterally: extends the neck
</answer>

Splenius cervicus PA (Origin)
SP T3‐6

Splenius cervicus DA (Insertion)
Posterior tubercles of the TP C1‐2(3) (anterior to the attachment of levator scapulae)

Splenius cervicus innervation
Lateral branches of posterior rami of lower cervical spinal nerves

Splenius cervicus blood supply
Br. off the external carotid

Splenius cervicus actions
<answer>
Unilaterally: ipsilateral rot. &amp; SB neck

Bilaterally: extends the neck
</answer>