name & describe the deep spaces of the neck
Pretracheal space – between visceral layer and larynx/trachea. Ends in the thorax.
Prevertebral space – between vertebral layer and vertebral bodies. Starts at the base of the skull and endsin the thorax.
Retropharyngeal space – betweenvisceral and alar layers. Starts at the base of the skull and ends at T1/T2.
Alar space – between alar and vertebral layers. Starts at the base of the skull and ends at the diaphragm.Contains the sympathetic trunks.
Parapharyngeal spaces – oneither side of the pharynx, between the investing layer, the buccopharyngealfascia of the pharynx, and the alar layer. These spaces are high up in theneck, extending from the base of the skull to the hyoid bone. They contain the carotid sheaths and deep cervical lymph nodes.