ANAT 2646 Cerebral Cortex - Cerebral Cortex More than of...

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Cerebral Cortex More than ½ of the cortex is hidden within the sulcus 2-4mm thick Structure Laminar (3 - 6 layers) anatomic organization Columnar (modules of cortex) functional organization
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Cell Types Pyramidal - excite Spiny stellate - excite Smooth stellate - inhibit Bipolar – excite or inhibit
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Lamina Molecular – mostly fibers Outer granule Outer pyramidal Inner granule Inner pyramidal Fusiform
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Projection Fibers Leaves the cortex corticospinal
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Association Fibers From one part to another within a single hemisphere short: from one gyrus to another within a lobe long: from one lobe to another superior longitudinal fasciculus inferior longitudinal fasciculus arcuate uncinate cingulum
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Commissural Fibers From one hemisphere to the other Corpus callosum Anterior commissure Posterior commissure Habenular commissure
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Afferents Association Commissural Thalamocortical (specific) Thalamocortical (non-specific) Neuraxial
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Efferent Fibers Association (small pyramidal)
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ANAT 2646 Cerebral Cortex - Cerebral Cortex More than of...

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