Brain stem and cerebellum

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Chapter 17

22 Terms

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Brainstem

Consists of the midbrain, pons, and medulla oblongata

<p>Consists of the midbrain, pons, and medulla oblongata</p>
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Midbrain

Involved in vision, hearing, motor control and more

<p>Involved in vision, hearing, motor control and more</p>
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Cerebral aqueduct

Runs through the midbrain and allows for CSF to flow from the third ventricle to the fourth ventricle

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Tectum

Involved in auditory and visual reflexes

<p>Involved in auditory and visual reflexes</p>
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What are the bulging structures on the tectum?

Corpora quadrigemina

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Superior colliculus

Involved in visual reflexes and eye and hand movement

<p>Involved in visual reflexes and eye and hand movement</p>
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Inferior colliculus

Involved in auditory reflexes

<p>Involved in auditory reflexes</p>
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Pineal gland

Produces melatonin

<p>Produces melatonin</p>
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Oculomotor nerve

Controls muscles involved in eye movements and the constriction and dilation of the pupil

<p>Controls muscles involved in eye movements and the constriction and dilation of the pupil</p>
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Pons

Contain tracts that connect the diencephalon and cerebrum to the cerebellum and medulla oblongata

Controls chewing, swallowing, breathing, etc.

<p>Contain tracts that connect the diencephalon and cerebrum to the cerebellum and medulla oblongata</p><p>Controls chewing, swallowing, breathing, etc.</p>
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Medulla oblongata

  • Contains motor tracts ventrally

  • Contains sensory tracts dorsally

  • Contain nuclei involved in heart rate, blood pressure, breathing, vomiting, sneezing, etc.


<ul><li><p>Contains motor tracts ventrally</p></li><li><p>Contains sensory tracts dorsally</p></li><li><p>Contain nuclei involved in heart rate, blood pressure, breathing, vomiting, sneezing, etc. </p></li></ul><p></p>
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Cerebral hemisphere

Located in red. Involved in coordination of motor activity

<p>Located in red. Involved in coordination of motor activity</p>
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Folia

Located in green. The small folds of the cerebellum

<p>Located in green. The small folds of the cerebellum</p>
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Arbor vitae

Collection of white matter in the cerebellum

<p>Collection of white matter in the cerebellum</p>
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Fourth ventricle

  • Receives CSF from the 3rd ventricle from the cerebral aqueduct

  • Allows CSF to move to the central canal of the spinal cord inferiorly

  • Allows CSF to move into the subarachnoid space laterally and posteriorly


<ul><li><p>Receives CSF from the 3rd ventricle from the cerebral aqueduct</p></li><li><p>Allows CSF to move to the <strong>central canal of the spinal cord </strong>inferiorly</p></li><li><p>Allows CSF to move into the <strong>subarachnoid space </strong>laterally and posteriorly</p></li></ul><p></p>
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Transverse fissure

Separates the cerebellum and the occipital lobe of the cerebrum

<p>Separates the cerebellum and the occipital lobe of the cerebrum</p>
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Vermis

Segmented narrow band of nervous tissue

<p>Segmented narrow band of nervous tissue</p>
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Olfactory bulb

Receives input from the olfactory neurons coming from the nasal cavity

<p>Receives input from the olfactory neurons coming from the nasal cavity </p>
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Olfactory tract

Carries olfactory information from the olfactory bulb to the cerebrum

<p>Carries olfactory information from the olfactory bulb to the cerebrum</p>
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Optic nerve

Carries information from the retina of the eye

<p>Carries information from the retina of the eye</p>
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Optic chiasm

The site at which some axons in each optic nerve cross over to the other side

<p>The site at which some axons in each optic nerve cross over to the other side</p>
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Optic tract

Carries information from the optic nerves to the thalamus

<p>Carries information from the optic nerves to the thalamus</p>