Parasympathetic innervation: ciliary ganglion Flashcards
what is the parasympathetic innervation a division of?
autonomic nervous system
function of parasympathetic NS?
involuntary, and acts with the sympathetic system to maintain body homeostasis
action of PNS?
‘rest and digest’ response
where do parasympathetic fibres begin?
in the central nervous system
where are the nerves supplying the head and neck situated?
within four nuclei, located within the brainstem
what is each nucleus of the parasympathetic fibres associated with?
a cranial nerve
what are the cranial nerves associated with the nucleus of parasympathetic fibres?
the oculomotor, facial, glossopharyngeal and vagus nerves
function of the cranial nerves associated with the nucleus of parasympathetic fibres?
these nerves carry the parasympathetic fibres out of the brain
After leaving the brain, the parasympathetic fibres from each nuclei synapse where?
in a peripheral ganglion
what is the peripheral ganglion?
a collection of neurone cell bodies outside the CNS
where are the peripheral ganglion typically located?
near to the target viscera
From the ganglia, post-ganglionic parasympathetic fibres continue to?
to the organs in the head and neck, providing parasympathetic innervation
what are the parasympathetic ganglion located within the head?
there are 4:
ciliary, otic, pterygopalatine and submandibular
where do the 4 parasympathetic ganglion receive fibres from?
from the oculomotor, facial and glossopharyngeal nerves
what does the vagus nerve innervate?
only innervates structures in the thorax and abdomen
