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20 Cards in this Set
- Front
- Back
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definition of Insula
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a pat of the cerebral cortex invaginated into the lateral sulcus
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function of insula
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sensory and auditory function
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define opercula
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they are the gyri that cover the insula
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what are the opercula
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1. orbital operculum
2.frontal operculum 3.fronto-parietal operculum 4.temporal operulum |
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define claustrum
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thin plate of grey matter between lentiform nucleus and insula
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define association fibers
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connects the gyri on the same hemisphere
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types of association fibers
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1- short association fibers
2- long association fibers |
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types of white matter fibers in the cerebrum
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1- association fibers
2- commissural fibers 3- projection fibers |
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examples of association fibers
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1- inf longitudinal bundle
2- sup longitudinal bundle 3- uncinate fasciculus 4- cingulum |
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definition of commissural fibers
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connect gyri on the opp hemisphere
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examples of commissural fibers
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1- corpus callosum
2- ant. commissure 3- post. commissure 4- habenular commissure 5- optic chiasma 6- commissure of the fornix (hippocampal commissure) |
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definition of projection fibers
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connect the gyri with the lower centers of the cns
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types of projection fibers
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1-ascending fibers (thalamic radiation)
2-descending fibers (pyramidal and extra pyramidal) |
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definition of internal capsule
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a thick band of ascending and descending fibers
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site of internal capsule
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between:
-lentiform nucleus -caudate nucleus and- thalamus -corona radiata |
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origin of vertebral artery
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1st part subclavian artery
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level of termination of vertebral
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lower level pons by union of 2 vertebral a
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branches vertebral
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- ant spinal a
- post spinal arteries - post inf cerebellar artery - medullary twigs |
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basilar artery termination
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at upper border pons
by giving two post cerebral a |
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basilar a. branches
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- pontine banches
- labyrinthine - ant inf cerebellar a - superior cerebellar a - post cerebral a |
