Ch. 17 Cerebrum
What does the cerebrum consist of?
diencephalon & cerebral hemispheres (telencephalon)
What are considered the subcortical structures?
subcortical white matter, basal ganglia, & amygdala
What is the cerebral cortex?
The gray matter on the external surfaces of the hemispheres
What is the Thalamus considered?
Executive assistant for the cerebral cortex (reg. flow of info to the cerebral cortex)
What is the "Master controller of Homeostasis"?
What does the hypothalamus actually do?
regulates vital functions
reg. eating, sex drive, anger, expression of pleasure & rage, sleep wake cycles
What is the epithalamus?
"Home of the pineal gland"
endocrine gland (ANS)
regulates secretion of pit. gland, adrenals
part of limbic system
reg. secretion of parathyroids, insulin
What is the Subthalamus considered?
"Friend of the Basal Ganglia"
helps regulate mvmt
located under thalamus
Describe the flow of cortical info?
Primary sensory cortex
secondary sens cortex
motor planning areas
primary motor cortex
What are the 3 types of white matter fibers?
projection (axons connecting cortical & subcortical structures)
commissural (axons connecting similar areas of R & L cerebral hemispheres
association (axons connecting cortical regions within one hemisphere)
Where is the internal capsule located?
between thalamus & basal ganglia
What kind of impact would a small lesion of the internal capsule have?
Large impact on function (bouquet stem analogy)
What are Brodmann's Areas?
52 histological areas ID for similar function based on the results of brain surgery
What is Wernicke's area?
#43- auditory comprehension, damage= receptive aphasia
What is Broca's Area?
#44- production of speech, damage= expressive aphasia
What does the primary somatosensory area do?
Discriminates shape, texture, or size
What does the primary auditory area do?
conscious discrimination of loudness & pitch of sounds
What is the primary visual area for?
distinguishes intensity of light, shape, size, location of objects
What is the primary vestibular area for?
discriminates head positions & movements