Antrochoanal polyps arise from the maxillary sinuses and are the much less common; ethmoidal polyps arise from the ethmoidal sinuses. Symptoms of polyps include nasal congestion, sinusitis, anosmia (loss of smell), and secondary infection leading to headache.
Relationship of internal jugular vein to the spinal accessory nerve (SAN). Spinal accessory nerve (SAN) posterior to the internal jugular vein. As the nerve approaches the sternocleidomastoid muscle (SCM), it may perforate the cleidomastoid portion of the SCM (80%) or run posterior to it (20%).
ï· Mixed Spinal Nerve: The term spinal nerve generally refers to a mixed spinal nerve, which carries motor, sensory, and autonomic signals between the spinal cord and the body. The peripheral nervous system (PNS) consists of the nerves and ganglia outside of the brain and spinal cord.ermatomes: A dermatome is an area of skin that is supplied by a single spinal nerve. Source URL: https://www.boundless.com/physiology/peripheral-nervous-system-pns/spinal-nerves/ Saylor URL: http://www.saylor.org/courses/psych402/ Attributed to: [Boundless] www.saylor.org Page 9 of 12 5. fig.