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20 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What are the two major cell types in the cortex?
What is the function of each? |
Ganule cells - major recipient (sensory cell) of cortex
Pyramidal cells - major output (motor cells) of cortex |
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What is granular cortex?
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Granular cortex (koniocortex) typifies primary sensory regions (i.e visual, somatosensory, and auditory) and is rich in granule cells.
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What is agranular cortex?
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Agranular Cortex typifies motor cortical areas. It is rich in pyramidal cells and poor in granule cells.
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Lamination: There are ____ major layers of cortex. Layer __ is closest to the surface (pia matter) and layer __ is closest to the while mater (deepest).
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Lamination: There are SIX major layers of cortex. Layer ONE is closest to the surface (pia matter) and layer SIXis closest to the while mater (deepest).
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Lamination: There are SIX major layers of cortex. Layer ONE is closest to the surface (pia matter) and layer SIXis closest to the while mater (deepest).
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Describe Layer 1 - 3 of the cerebral Cortex:
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Layer 1
- Outermost layer closest to pia. - Also called Molecular layer becuase it contains few cells, but many fibers Layer 2 -Contains small, granule cells - L.2&3 send and receive info to any from other cortical regions Layer 3: -Contains larger pyramidal cells -Pyramidal cells give rise to cortico-cortico projections |
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Describe Layer 4 - 6 of the cerebral Cortex:
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Layer 4:
-Mostly small, granule cells -Primary recipient zone of the cerebral cortex, receiving info from the thalamus Layer 5: -Contains large, pyramidal cells that project out of the cortex to SC, Brainstem, and Stratium Layer 6: -Contains cells of many shapes (multiform) - Projects out of cortext to thalamus. |
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What is the pattern of cerebral cortex areas that deal with higher functions?
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HOMOTypical Cortex:
-The ability to clearly distinguish all 6 layers |
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What cortical pattern are sensory areas of cortex?
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HETEROtypical = Sensory
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What are cortical columns?
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The elemental functional unit of cerebral cortex.
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The elemental functional unit of cerebral cortex.
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What two things do vertical columns of cells have in common?
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1. Cells in a given column respond to the same peripheral field.
2. Cells in a given column discharge at nearly the same latency. |
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The thalamus projects onto the cortex in _______.
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The thalamus projects onto the cortex in COLUMN-LIKE CLUSTERS.
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The thalamus projects onto the cortex in COLUMN-LIKE CLUSTERS.
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Clusters of cortical cells project intracortically in ______________.
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Clusters of cortical cells project intracortically in column-like clusters
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Primary sensory areas of cortex have adjacent cortical fields which are smaller and independent known as:
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"Secondary" sensory areas.
There areas are often smaller and more or less independent of the primary sensory areas. Since the cortical regions they occupy are smaller, the receptive fields of their neurons are usually larger. |
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Where is the primary somatosensory cortex located?
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Primary somatosensory cortex is located on the POST-CENTRAL GYRUS. (image?)
Receives info from the ventroposterior nuclei (VPLc and VPM) of the thalamus. |
Primary somatosensory cortex is located on the POST-CENTRAL GYRUS. (image?)
Receives info from the ventroposterior nuclei (VPLc and VPM) of the thalamus. |
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What do the 4 cytoarchitectonic fields (1,2,3a,3b) of the Somatosensory cortex receive?
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3b and 1 receive cutaneous discriminative touch.
3a and 2 receive deep tissue and joint input |
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What is unique about somatosensory cortext II (SII)?
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SII allows the integration of info from both sides of the body and many body parts have bilateral representation.
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What role do Primary (SI) and Secondary (SII) somatosensory cortex have in pain sensation?
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SI and SII are likely involved in localization and discerning pain intensity.
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Wat role do the rostral insula and rostral cingulate cortex have in pain sensation?
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The rostral insula and rostral cingulate cortex have a role in the affective and reactive components of pain.
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The rostral insula and rostral cingulate cortex have a role in the affective and reactive components of pain.
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Where is the auditory cortex located?
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Auditory cortex is located on the TRANSVERSE GYRUS of HESCHL on the inferior bank of the lateral sulcus.
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The auditory cortex receives input from the:
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Medial Geniculate Body!
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