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Lecture 5

SPHR 2106 Lecture Notes - Lecture 5: Anterior Grey Column, Pia Mater, Reticular Formation


Department
Speech and Hearing Science
Course Code
SPHR 2106
Professor
Schulz
Lecture
5

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Homunculus: brain is topographically organized and LAF
The more complex the movement, the greater cortical space it gets
ex: hands and face are very complicated, get bigger area of the cortex dedicated to their
function
Central Nervous System: brain and spinal cord
Peripheral Nervous system: cranial nerves and spinal nerves
Nerves that go out of cns to the body
And sensory information going into the body
Division between somatic and involuntary
Somatic: voluntary control
Autonomic: involuntary control
Sympathetic vs parasympathetic
Basal ganglia: subcortical nuclei
movement control
Talks to the motor cortex in scaling ( volume control)
Attenuate: reduce ( parkinson’s disease)
Over active movement disorders (huntington's chorea)
Cerebellum: movement control
Talks to motor cortex in timing movement
Indirect motor system: basal gangalia and cerebellum
Motor cortex: direct motor system
Diencephalon:
Thalamus: group of nuclei and located on top of midbrain
Relays information to and from the body to the cortex, basal ganglia to the cortex,
cerebellum to the cortex
Hypothalamus: regulates drinking, eating
Brain stem: midbrain, pons, medulla
Has cranial nerves
Medulla: has two pyramids
Motor neurons:pyramidal tract: dessicate in medulla, from motor cortex to spinal cord
Starts in motor cortex to the spinal cord
Cross: desiccation
Spinal cord synapse with spinal nerve to talk to right arm, from spinal cord on
contralateral side to synapse in the muscle in right arm
find more resources at oneclass.com
find more resources at oneclass.com
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