Brain Statistics

Question 1

Number of cortical layers.

Answer 1

6

Question 2

Number of neurons in the brain.

Answer 2

100 billion

Question 3

Percent of body’s nutrients consumed by the brain.

Answer 3

25%

Question 4

Percent of body’s oxygen consumed by the brain.

Answer 4

25%

Question 5

Percent of body’s glucose burned by the brain.

Answer 5

70%

Question 6

Percent of total body weight that the brain represents.

Answer 6

2%

Question 7

Number of connections in the adult brain.

Answer 7

1 quadrillion

Question 8

Percent of the brain’s neurons housed by the cerebral cortex.

Answer 8

83%