Pons Flashcards

1
Q

What is the pons a derivative of?

A

metencephalon

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2
Q

What are the dorsal external pontine structures?

A

cerebellar peduncles

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3
Q

What is the function of the cerebellar peduncles?

A

they connect the cerebellum with the rest of the CNS

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4
Q

What is the ventral external pontine structure?

A

the basilar pons

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5
Q

What does the basilar pons give rise to?

A

the trigeminal nerve

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6
Q

What is the motor nuclei of the pons in charge of?

A

mastication

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7
Q

What type of sensory information comes into the pons and from where?

A

facial sensation - touch, vibration, and pressure from the trigeminal nerve

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8
Q

What is the pontine nucleus in charge of?

A

touch and vibration

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9
Q

What does the pontine nucleus send axons to?

A

the thalamus and cerebellum

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10
Q

What is the basilar pons made up of?

A

descending cerebral motor tracts

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11
Q

Where do the cerebral motor tracts of the basilar pons go?

A

midbrain, pons, medulla oblongata, and spinal cord

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12
Q

What is the path to activate the masticatory muscles (start from the basilar pons)?

A

cerebral motor tracts of the basilar pons to the motor nucleus of the trigeminal to the trigeminal nerve to the masticatory muscles

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13
Q

What type of somatic sensory function is the midbrain in charge of?

A

proprioception

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14
Q

What type of somatic sensory function is the medulla oblongata in charge of?

A

pain and temperature

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15
Q

What will a lesion to the pons cause?

A

motor and sensory deficits, loss of pain and proprioception, paresis and paralysis, and coma

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16
Q

What can a lesion to the trigeminal nerve cause?

A

loss of muscle tone to the muscles of mastication, loss of function of the jaw, loss of facial sensation on the lesioned side, loss of palpebral, third eye, and corneal reflexes