Table 3. Estimated cost of mammalian cerebral cortex and cerebellum.

Cerebral cortex
Number of neurons	Total glucose use per minute (µmol/min)	Total glucose use per day (µmol/day)	Total glucose use per day (g/day)	Total caloric cost per day (kCal/day)
1 million	0.015	21.6	0.0039	0.016
10 million	0.150	216	0.039	0.155
Smoky shrew, 10 million1	0.150	216	0.039	0.155
Mouse, 13 million2	0.195	280.8	0.050	0.202
Rat, 31 million2	0.465	669.6	0.120	0.48
100 million	1.500	2160	0.389	1.56
Agouti, 112 million2	1.680	2419	0.435	1.74
Marmoset, 245 million3	3.675	5292	0.952	3.81
Capybara, 306 million2	4.590	6610	1.190	4.76
Owl monkey, 442 million3	6.630	9547	1.718	6.87
1 billion	15.0	21600	3.89	15.55
Macaque, 1.7 billion3	25.5	36720	6.61	26.44
Baboon, 2.9 billion4	43.5	62640	11.28	45.10
Orangutan, 5.5 billion5	82.5	118800	21.38	85.5
10 billion	150	216000	38.88	155.5
Human, 16 billion6	240	345600	62.21	248.8
100 billion	1500	2160000	388.8	1555.2

¹From (39);

²From (23);

³From (24);

⁴From (25);

⁵Estimated as 1/3 the number of neurons in the human cerebral cortex;

⁶From (26).