cranial nerves
*** The following format is used: Nerve -- Motor (M) or Sensory (S) -- Origin -- Function
0 Terminal (Preoptic)
S
Telencephalon; ventral border of olfactory bulb
Smell? and sensory endings of snout
I Olfactory
S
Telencephalon; anterior end of olfactory bulb
Smell
II Optic
S
Diencephalon; optic lobes
Sight
III Oculomotor
M
Mesencephalon; posterior ventral end of medulla between optic lobes and cerebellum
All eye muscles but lateral rectus and superior oblique
IV Trochlear
M
Mesencephalon; dorso-lateral anterior surface of medulla
Movement superior oblique muscle
V Trigeminal
MS
Mesencephalon; anterior lateral border of medulla oblongata
a) sensory to snout, conjunctiva, cornea, iris, ciliary body (ophthalmicus); b) sensory to upper jaw and snout (maxillaris); c) sensory to lower lip and teeth, motor to mastication muscle (mandibularis)
VI Abducens
M
Metencephalon; anterior ventral end of medulla oblongata
Lateral rectus eye muscle and retractor bulbi muscles in part
VII Facial
MS
Metencephalon; lateral border of medulla oblongata just posterior to trigeminal and with acoustic
Motor to muscles of hyoid arch (hyomandibular); sensory to geniculate ganglion, sensory to taste bud system; sensory to lateral line organs of snout
VIII Acoustic
S
Myelencephalon; with facial from lateral border of medulla oblongata
Sensory to equilibrium, hearing, acceleration
IX Glossopharyngeal
MS
Myelencephalon; posterior lateral border of medulla with vagus
Motor to third visceral arch; sensory to pharyngeal area and posterior tongue region; sensory to lateral line components of posterior head region
X Vagus (Pneumogastric)
MS
Myelencephalon; posterior lateral border of medulla with glossopharyngeal
Sensory to pharynx, oesophagus, thoracic and abdominal viscera. Pharyngeal musculature, visceral musculature. Trunk lateral line. Visceral arches behind third. Respiratory movement

Dictionary of ichthyology. 2009.

Look at other dictionaries:

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