PNS Flashcards

1
Q

How many pairs of cranial nerves are there

A

12 pairs

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2
Q

Which cranial nerve sends sensory info about both hearing and equilibrium

A

vestibulochlear nerve

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3
Q

Which cranial nerve sends sensory info from the eye

A

Optic

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4
Q

Which nerve sends sensory info from the nose?

A

Olfactory

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5
Q

Which three cranial nerves send motor signals to move the eyes?

A

Oculomotor-superior recuts, inferior rectus, medial rectus, inferior oblique
Trochlear-Superior oblique
Abducens- Lateral rectus

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6
Q

Which three cranial nerves send sensory information about taste

A

Glossopharyngeal
Facia
Vagus

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7
Q

What are the three divisions of the trigeminal nerve

A

Ophthalmic
Maxillary
Mandibular

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8
Q

Which nerve controls facial movement?

A

Facial

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9
Q

What else does the facial nerve do?

A

Activates tear/salivary glands, taste

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10
Q

Which nerve controls tongue movement

A

Hypoglossal

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11
Q

Which nerve when overstimulated or disturbed would cause wide spread effects such as change in heart rate and breathing?

A

Vagus nerve

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12
Q

When you go to the dentist and they use a local anesthetic you loss feeling in the lower jaw as well as some motor control of the mouth, which nerve is targeted by the local anesthetic?

A

Mandibular branch of the trigeminal nerve

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13
Q

Which nerve sends general info about temperature, pain, tactile info from the tongue

A

Mandibular branch of the trigeminal nerve

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14
Q

Which cranial never is a branch of the vagus nerve

A

The accessory nerve

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15
Q

What does the accessory nerve do

A

Innervates neck and back muscles

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16
Q

How many pairs of spinal nerves are there

A

31 pairs

17
Q

What root of the spinal cord is motor

A

Ventral root

18
Q

What root of the spinal cord is sensory

A

Dorsal root

19
Q

Explain the knee jerk reflex

A

When the patellar ligament is tapped, the leg jerks straight. Sensory neuron sends signal to spinal cord, spinal cord sends signal to motor neuron

20
Q

Explain the withdrawal reflex

A

Subconscious reaction to painful stimulus. Sensory neuron synapses on interneurons which synapse on motor neuron to withdrawal (more than one synapse)