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30 Cards in this Set
- Front
- Back
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List the three meninges, from superficial to deep.
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Dura mater, Arachnoid, Pia Mater.
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What produces CSF?
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The Arachnoid Villi.
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What are the two functions of CSF?
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Protective to the nervous system, and circulatory.
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Why does the brain have to be so vascular?
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It needs a constant supply of glucose and oxygen.
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What is the difference between a ganglion and a nucleus?
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A ganglion is found in the PNS, and a nucleus is found in the CNS.
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What is the difference between a nerve and a tract?
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A nerve is found in the PNS, a tract is found in the CNS.
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What is the difference between gray matter and white matter?
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Gray matter is unmyelinated nerve fibers, and white matter is myelinated nerve fibers.
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Name the 4 main areas of the brain and their parts.
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1) Brain Stem - medulla oblongata, pons, midbrain
2)Cerebellum 3) Dyinsephalon - thalmus, hypothalmus, epithalmus 4) Cerebrum |
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What is the special name given to the cerebellar medulla due to its appearance?
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Arbor Vitae.
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What are convolutions, and what to they do to the surface area of the cerebrum?
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Convolutions are ridges and grooves which increase the surface area/number of brain cells.
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What are the characteristics of the medulla?
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It is deep, and composed of white matter.
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What are the characteristics of the cortex?
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It is superficial, and made of grey matter.
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What do association tracts do?
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They connect lobes in a hemisphere.
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What do projection tracts do?
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They connect major areas of the brain.
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What do commiseral tracts do, and what is the largest one?
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They connect the left and right hemispheres. The largest is the corpus collosum.
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How many pairs of cerebral lobes exist, and which is deep?
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5--The deep one is the insula. (The others are the pariatal, frontal, temporal, and occipital.)
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What is the function of the pariatal lobe?
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Sensory input.
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What is the function of the frontal lobe?
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Motor function and personality.
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What is the function of the temporal lobe?
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Hearing.
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What is the funtion of the Insula?
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Smell.
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What is the function of the occipital lobe?
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Vision.
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What are the cerebral nuclei, and what do they do?
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They are islands of grey matter in the medulla, that produce neurotransmitters and refine motor impulses with the cerebellum.
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What happens to motor impulses leaving the brain when they pass through the medulla oblongata?
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They cross from right to left. (Decasation)
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What is Wernickes area, and what does it do?
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Converts sounds to images.
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What is Brocas area and what does it do?
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Converts images to sounds.
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What is the function of the prefrontal cortex?
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All concious thoughts, ideas, thinking, analysis.
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Where does the sensory info enter the cerebral cortex?
(And what is the editor?) |
The Postcentral Gyrus.
(Thalmus) |
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Where in the cortex are motor impulses initiated?
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The Precentral Gyrus.
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What are sulcis and fissures?
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Sulci - Shallow grooves
Fissure - Deeper grooves |
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What are Gyris?
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Elevated ridges of tissue.
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