Neck scan showing cervical fascia

Axial scan of neck. Superficial (investing) layer of the deep cervical fascia (blue line); deep layer of the deep cervical fascia (orange line); sternocleidomastoid muscle (purple area); posterior cervical space (red area); carotid bifurcation (yellow line); internal jugular vein (green line); vertebral artery (pink line). The local anesthetic injection sites for superficial, intermediate, and deep cervical plexus blocks are shown in this graphic. For further information refer to UpToDate content on cervical plexus blocks.