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16 Cards in this Set

  • Front
  • Back
Difference btw neocortex and allocortex?
-neocortex has 6 layers of cells while allocortex has fewer than 6 layers
What are the two types of cortical neurons?
-pyramidal cells
-granule cells
Pyramidal cells
-most numerous cortical neurons
-efferent neurons of the cortex
Granule cells
-star shaped
-local projection interneurons
What vessels perfuse the cortex?
-anterior, posterior, and middle cerebral arteries
What are the 6 layers of neocortex?
1. molecular
2. ext granular
3. ext pyramidal
4. int granular
5. int pyramidal
6. multiform
What structures can give direct inputs to the cortex?
-only neurons located at or above the upper brainstem level
Where do cortical pyramidal cells project?
-other cortical areas
-basal ganglia
-brainstem/spinal cord
What do all thalamic inputs to the cortex have in common?
-they all are excitatory
-they all release glutamate
How do ACh, amines, and peptides effect the cortex?
-they all raise the excitability of cortical neurons
Granular cortex
-primary sensory cortical areas
-many granule cells
Agranular cortex
-primary motor cortex and premotor cortex
-few granule cells
Roughly how many different cortical areas are there in the brain?
-at least 30
What are the two subdivisions of allocortex?
-ventral surface of the frontal and temporal lobes
-contributes to the sense of smell and to limbic system function
-the hippocampal formation
-contributes to memory formation, emotional response