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24 Cards in this Set
- Front
- Back
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What ar eassociation tracts?
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-they connect one part of a hemisphere to another part of the same hemisphere
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What are commissural tracts?
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-connect one hemisphere to the other
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What are projection tracts?
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-connects upper and lower parts of brain
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What is decussation and where is it located?
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-crossing over of nerve fibers from one side of body to opposite
-in medulla |
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What are the pons and medulla?
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-relay center for incoming and outgoing impulses.
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What does the primary somatosensory cortex do, located, and what important aspects does it include?
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-receives sensory impulses from entire body
-usues post-central gyrus in parietal lobe -first 40% includes the head -the lips is the most sensitive part of body -trunk has small portion of brain |
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Where is the primary motor cortex located and what does it include?
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-uses pre-central gyrus in frontal lobe
-first 60% is head and hands -genitals have no motor area (controlled by blood) |
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What does the meningres do and where is it located?
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-protects the brain and under bone
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What is duramater and its location?
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-2 layers of dense irregular connective tissue (meningeal and periostal layers)
-on top of head which separates to form dural sinus |
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Where is the arachnoid located and what does it contain?
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-internal in duramater
-contains sub arachnoid space which is filled with CSF |
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What is the pia mater and where is it located?
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-highly vascular
-inferior to arachnoid |
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What is the subdural space?
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-potential space that only exists in a diseased or dead brain
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What is the falx cerebri?
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-longitudinal fissure from menigis in cerebrum
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What is the falx cerebelli?
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-fissure from menigis in cerebellum
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What does the arachnoid villi do?
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-goes into blood to take nutrients into brain and remove waste from CSF
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What are the 4 ventricles and how are they connected?
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-2 lateral ventricles ---->connected to
-third ventricle ---by interventricular foramen -fourth ventricle- runs down spinal cord and connected to third ventricle by mesencephalic aqueduct |
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What are ventricles?
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-hollow spaces in brain filled with CSF
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Where is CSF produced?
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-produced in choroid plexus (in corpus callosum)
-materials retreved from blood and taken in by epidymal cells |
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What is the flow of CSF?
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-enters thrid ventricle from choroid plexus
-goes down aqueduct to fourth ventricle -goes through aperture to subarachnoid space and circulated around brain and spinal cord -then flows into dural sinus |
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What is the function of CSF?
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-to cushon brain and reduce impace (shock absorber)
-removes metabolic waste by transferring to blood -gets nutrients from blood |
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What is meningitis?
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-inflammation of meninges
-can be either viral or bacterial |
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How does a virus cause meningitis?
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-a given virus has a primary target tissue
-seeks out certain tissues -once in cell, it forces cell to replicate virus |
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How does a bacteria cause meningitis?
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-produces toxins
-bacterial metabolic waste toxic to certain cells |
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What is the end result of meningitis?
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-causes cell death
-death of menigeal cells weakens BBB -inflamitory response triggers swelling inward -can be fatal |
