If the Human Brain Didn't Have So Many Deep Crevasses

question 204

Multiple Choice

If the human brain didn't have so many deep crevasses and wrinkles in the cortex, then the:

• A) amygdala would not be able to regulate the person's initial emotional responses.
• B) fetus would die prenatally because the hypothalamus couldn't regulate the autonomic nervous system.
• C) newborn's head would be too large to fit through the mother's birth canal.
• D) person would have difficulty performing bodily functions that are not consciously willed.

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Definitions:

Brainstem

The lower extension of the brain, connecting the cerebrum with the spinal cord, and controlling vital functions such as breathing and heart rate.

Cranial Nerves

Twelve pairs of nerves that are connected directly to the brain or brainstem and are responsible for motor and sensory functions of the head and neck.

Hypoglossal Nerve

The twelfth cranial nerve, responsible for motor control of the tongue.

Oculomotor Nerve

The oculomotor nerve, which is the third cranial nerve, is tasked with overseeing the majority of movements in the eye, such as pupil constriction and keeping the eyelid raised.