PNS nerves Flashcards

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1
Q

what does the PNS consist of?

A

nerves, sensory receptors, and ganglia

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2
Q

what is a nerve?and what types are in the PNS?

A

a bundle of axons sheathed in c.t
nerves
cranial and spinal nerves

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3
Q

what are cranial nerves?

A

12 pairs number i-xii
may be motor sensory or both

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4
Q

what is the olfactory nerve?

A

i- smell (olfaction) -sensory

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5
Q

what is the optic nerve?

A

ii- vision-sensory

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6
Q

what is the oculomotor nerve?

A

iii- movements of eye and eyelid and pupil constriction-motor

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7
Q

what is the trochlear nerve?

A

iv- eye movements looking downward-motor

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8
Q

what is the trigeminal nerve?

A

v- sensory- from skin of face, teeth, gums
motor- muscles of mastication and tongue

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9
Q

what is the abducens nerve?

A

VI- lateral eye movements - sensory

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10
Q

what is the facial nerve?

A

VII- sensory- taste from 2/3 of tongue
motor- facial expression muscles lacrimal gland and salivary gland

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11
Q

what is the vestibulocochlear nerve?

A

VIII- hearing balance and equilibrium -sensory

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12
Q

what is the glossopharyngeal nerve?

A

IX- sensory- taste from posterior 1/3 of tongue and throat carotid artery BP
motor- salivary glands and swallowing muscles

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13
Q

what is the vagus nerve?

A

X- visceral sensory and visceral motor for thoracic and abdominopelvic organs

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14
Q

what is the accessory nerve?

A

XI- sternocleidomastoid and trapezius also muscles of pharynx and vocal cords - motor

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15
Q

what is the hypoglossal nerve?

A

XII- tongue muscles- motor

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16
Q

what are the spinal nerves?

A

31 pairs- emerge from intervertebral foramina
formed from ventral and dorsal root
mixed motor and sensory
spinal nerves branch from dorsal and ventral rami
ventral rami join laterally to form plexuses