Cerebral Hemispheres I

Question 1

Divisions of the cerebrum

Answer 1

• L and R hemispheres: longitudinal fissure
• sulci: shallow grooves that separates gyrus
• gyri: elevated ridges of tissue
• fissures: deep grooves that split the brain regions
• corpus callosum: white matter that connect the hemispheres

Question 2

Cerebral hemispheres characteristics

Answer 2

-largest, outermost region of the brain
(highly developed in humans)
-involved with higher NS functions

Question 3

Higher NS functions

Answer 3

• consciousness
• sensations
• communication
• memory
• voluntary motions

Question 4

Gray vs white matter

Answer 4

• gray matter: nonmyelinated axons and cell bodies, important region for integration (envelops white matter)
• white matter: myelinated axon, involved with communication

Question 5

Regions of the cerebrum

Answer 5

• cerebral cortex: thin covering of gray matter
• deep to the cerebral cortex is white matter and isolated regions of gray matter
• basal nuclei: isolated regions of gray matter
• cerebral white matter: communication between areas of cerebral gray matter and between cerebrum and lowers CNS regions

Question 6

Functions of the cerebral cortex

Answer 6

• speech
• memory
• consciousness
• interpretations of sensations
• emotional and logical response
• voluntary movement

Question 7

Task localization in the cortex

Answer 7

• different regions of the cortex handle different tasks
• motor regions
• sensory regions
• association regions