Fascial layers of the neck

superficial fascia

encloses platysma

deep superficial fascia (really? yeah really)

investing

Encloses SCM and trapezius
Injury causes EJV to be held open - risk air embolism
continuous with thoracolumbar fascia

pretracheal

Covers trachea and thyroid

prevertebral

carotid sheath

Contains common and internal carotid, IJV, vagus nerve

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