Cerebral Cortex

Question 0

Layer 2

Answer 0

External granular layer
Intracortical connections (not association though)

Question 1

Layer 1

Answer 1

Molecular layer

Mostly synapses

Question 2

Layer 3

Answer 2

External pyramidal layer

Association/commisural efferents

Question 3

Layer 4

Answer 3

Internal granular layer

Thalamic afferents

Question 4

Layer 5

Answer 4

Internal pyramidal layer

Motor efferents

Question 5

Layer 6

Answer 5

Multiform layer

Efferents

Question 6

What cell type predominates in the sensory cortex

Answer 6

Granular GABA

Big layer 4 where neurones terminate

Question 7

What cell type predominates motor cortex

Answer 7

Pyramidal

Excitatory use glutamate

Question 8

Describe allocortex

Answer 8

10% of cortex
3 layers only
Hippocampus and olfactory

Question 9

What are betz cells

Answer 9

Giant pyramidal neurones
In 5th layer
Forms axons of corticospinal tract

Question 10

Locus coeruleus afferent to subcortical areas

Answer 10

Uses NA

Decreased leads to depression

Question 11

Brainstem raphe nuc subcortical afferent

Answer 11

Decreased 5-ht leads to insomnia and schizophrenia

Question 12

Median forebrain complex subcortical afferent

Answer 12

Ach afferents,

Decreased associated with memory loss of in alzheimers

Question 13

How does pet scanning work?

Answer 13

Radionuclear tracer attached to glucose and intravenously injected
Tracer emits gamma waves which are detected
Used simultaneously with ct scanning