lecture 22 Flashcards
what is the transverse fissure
it is the divide of the cerebrum from the cerebellum
name the three sulci
parieto-occiptial, central and lateral
what is the occipital lobe associated with
vision
what is the temporal lobe associated with
memory and hearing
what is the parietal lobe associated with
somatosensory, senses we are aware of
what is the frontal lobe associated with
the prefrontal lobe is personality and language. the posterior part of the frontal lobe is motor control
what are the three tract types
commisural, projection, association
whats a commisural tract and example
bidirectional axons from one side of cerebrum to another, example is the corupus callosum
what is a projection tract and example
a group of axons that run between the cerebral cortex and other regions of CNS. example is the corticospinal tract
what are association tracts and example
a group of axons travelling within the same side of a cerebrum cortex
what does homunculus mean
a map showing a proportional representation of the somatosensory or motor neurons in the brain.
what is the diencephalon
a structure which includes the thalamus and hypothalamus that sits on the brain stem
describe upper motor neuron of the corticospinal pathway
- Cell body in primary motor cortex (precentral gyrus)
- Axon extends from motor cortex to spinal cord on opposite side, crossing over at medulla oblongata
- Makes synapse on lower motor neuron at the ventral horn
what are the two pathways we need to know
the corticospinal pathway and the dorsal column pathway
describe the lower motor neuron of the corticospinal pathway
- Cell body in ventral horn (grey matter) of spinal cord
- Axon extends out of spinal cord (ventral root) into body
- Makes synapse on skeletal muscle
