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26 Cards in this Set
- Front
- Back
Define association fibers.
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Fibers that travel between different parts of the same hemisphere
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What are the two types of association fibers?
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Short and long.
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What do short association fibers link?
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Different gyri within a lobe.
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What do long association fibers link?
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Different lobes within a hemisphere
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Name the 6 long association fibers.
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Superior occipitofrontal, inferior occipitofrontal, superior longitudinal, unicate, inferior longitudinal, and cingulum fasciculi.
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What two lobes does the superior occipitofrontal fasciculus link?
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Frontal to occipital
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What two lobes does the inferior occipitofrontal fasciculus link?
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Frontal to occipital
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What two lobes does the superior longitudinal fasciculus link?
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Frontal to occipitotemporal cortex
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What two lobes does the unicate fasciculus link?
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Frontal to anterior temporal
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What two lobes does the sinferior longitudinal fasciculus link?
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Occipital to temporal
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What two lobes does the cingulum fasciculus link?
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Underlies the cortex of te cingulate gyrus.
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Define commissural fibers
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Link matching areas of both hemispheres.
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What is the largest commissural fiber connection?
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Corpus callosum of white matter.
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Of the corpus callosum, what are the parts of the main body, which is visible on section along the longitudinal fissure?
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Trunk, splenium, genu, rostrum.
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Some fibers run superior lateral from the body, intersecting the _________.
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Corona raiata.
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What is the Tapetum of the corpus callosum?
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A collection of fibers that run laterally and then inferiorly to reach temporal and occipital lobes.
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The occipital forceps are also known as the _____ forceps.
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Major
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The frontal forceps are also known as the _________________ forceps.
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Minor
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The occipital forceps travel between ____________ via __________.
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Medial walls of the occipital lobe; splenium.
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The frontal forceps travel between the __________ via ____________.
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Medial walls of the frontal lobe; genu.
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What does the anterior commisure connect?
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Anterior parts of the temporal lobes and the two olfactory tracts.
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Trace the pathway of the posterior commisure.
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Fibers from pretectal nucleus that are travel to oculomotor nucleus.
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The posterior commisure controls __________.
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Pupillary response to light (CN III).
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What does the habenular commissure connect?
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The thalamus with the contralateral habenular nucleus.
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What are projection fibers?
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Fibers that leave the cerebrum to subcortical nuclei in the cerebral hemisphere, brainstem, and spinal chord.
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Where are projection fibers found?
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Internal capsule and corona radiata.
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