Question

quiz instructions
unit 1 exam - worth 150 points
over chapters 1, 2, 3, 6, & 7

• 75 multiple choice questions, worth 2 points each.
• you will have 90 minutes.
• each student gets a different set of questions.
• one attempt with no back tracking to change answers.
• no late exams given. no exceptions.

question 15
2 pts
in the context of the cerebral hemispheres, a split brain occurs due to ______.

• loss of the myelin sheath
• damage to the amygdala
• severance of the corpus callosum
• pressure on the frontal lobe

Explanation:

To solve this, we analyze each option:

• "loss of the myelin sheath" is related to conditions like multiple sclerosis, not split - brain.
• "damage to the amygdala" affects emotional processing, not the connection between cerebral hemispheres.
• The corpus callosum is the band of fibers connecting the two cerebral hemispheres. Severing it (as in split - brain surgery) leads to a split - brain condition.
• "pressure on the frontal lobe" affects frontal lobe functions, not the connection between hemispheres.

Answer:

C. severance of the corpus callosum