what nervous system are the cranial nerves part of?
Peripheral nervous system
Where are the cranial nerves attached to?
Where do most cranial nerves begin or end? What are the exceptions?
Brainstem CNI and CNII
What are the functions of most cranial nerves? What is the exception?
mostly localized to structures in the head and neck exception: CN X (vagus nerve)
CN I : brain attachment: cranial opening: Notes on pathway:
CN I : olfactory nerve brain attachment: olfactory bulbs of frontal lobe cranial opening: cribrifrom plate of ethmoid Notes on pathway: receptors located in nasal epithelium, neurons travel through cribriform plate of the ethmoid bone, located in roof of nasal cavity, to reach olfactory bulbs under frontal lobes of cerebrum. Not attached to brainstem!!
CN X : brain attachment: cranial opening: Notes on pathway:
CN X : vagus brain attachment: brainstem cranial opening: jugular foramen Notes on pathway: nerves originate in brainstem and exit via jugular foramen. nerve has wide distribution in head, descends along the carotid artery and internal jugular vein