Ch. 17 Cerebrum

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1

What does the cerebrum consist of?

diencephalon & cerebral hemispheres (telencephalon)

2

What are considered the subcortical structures?

subcortical white matter, basal ganglia, & amygdala

3

What is the cerebral cortex?

The gray matter on the external surfaces of the hemispheres

4

What is the Thalamus considered?

Executive assistant for the cerebral cortex (reg. flow of info to the cerebral cortex)

5

What is the "Master controller of Homeostasis"?

Hypothalamus

6

What does the hypothalamus actually do?

regulates vital functions

reg. eating, sex drive, anger, expression of pleasure & rage, sleep wake cycles

7

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

8

What is the Subthalamus considered?

"Friend of the Basal Ganglia"

helps regulate mvmt

located under thalamus

9

Describe the flow of cortical info?

Primary sensory cortex

secondary sens cortex

association cortex

motor planning areas

primary motor cortex

10

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)

11

Where is the internal capsule located?

between thalamus & basal ganglia

12

What kind of impact would a small lesion of the internal capsule have?

Large impact on function (bouquet stem analogy)

13

What are Brodmann's Areas?

52 histological areas ID for similar function based on the results of brain surgery

14

What is Wernicke's area?

#43- auditory comprehension, damage= receptive aphasia

15

What is Broca's Area?

#44- production of speech, damage= expressive aphasia

16

What does the primary somatosensory area do?

Discriminates shape, texture, or size

17

What does the primary auditory area do?

conscious discrimination of loudness & pitch of sounds

18

What is the primary visual area for?

distinguishes intensity of light, shape, size, location of objects

19

What is the primary vestibular area for?

discriminates head positions & movements