Page 126 - Edited - Webster HEAD AND NECK - part 2-Merge PDF

NERVE COMPONENTS LOCATION OF CELL PERIPHERAL FUNCTION
BODIES OF FIBRES DISTRIBUTION

VII Facial Afferent (sensory)

i) Visceral Geniculate (asynaptic) Anterior 2/3 tongue; palate Taste
(parasympathetic) ganglion
ii) Somatic Geniculate ganglion Skin of external auditory Touch, pain,
meatus, and external surface temperature
of ear drum

Efferent (motor)

i) Parasympathetic 1. Presynaptic axons from Secretomotor -
cell bodies in brainstem Salivation, lacrimation,
2. Postsynaptic fibres nasal mucus production
from cells of
a) submandibular ganglion; a) Submandibular, sublingual
b) pterygopalatine salivary glands, small glands
ganglion of floor of mouth.
b) Glands of palate and
nasal cavity, HN 317
and lacrimal gland

ii) Somatic Brainstem a) Skeletal muscles of facial Facial expression.
expression, platysma, buccinator, Closing the eyelids and lips,
posterior belly of digastric, changing shape of lips:
stylopharyngeus articulation of speech. Mastication.
b) Stapedius Hearing

VIII "Auditory", or more Afferent (sensory) Cochlear (spiral) Organ of Corti in cochlea Hearing
correctly: ganglion (asynaptic); of inner ear
Vestibulocochlear Vestibular ganglion Maculae and cristae of Balance; detection of
(asynaptic) vestibular labyrinth of movement
inner ear

crannerv 3