If the human brain didn't have so many deep crevices and wrinkles in the cortex, then:
A) the amygdala would not be able to regulate the person's initial emotional responses.
B) people would have difficulty performing bodily functions that are not consciously willed.
C) the billions of neurons in the cortex would require us to have gigantic heads.
D) fetuses would die prenatally because the hypothalamus wouldn't be able to regulate the autonomic nervous system.

Question

Quizplus · Accepted Answer

The deep crevices and wrinkles in the cortex increase the surface area, allowing for more neurons to be packed into a smaller volume. Without these structures, to accommodate the same number of neurons, our heads would indeed need to be much larger.

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