With approximately 16 million neurons in the frog brain a computer simulation of
the whole frog brain does not seem to be out of reach, especially if sensory resolution
is reduced. With skin, ear, and eye resolutions reduced the number of simulated
neurons could be reduced by a factor of 10.
Figure 1
| Brain Region | Weight (grams) | Weight (%) | Number of Neurons | Neuron % |
| Telencephalon (Forebrain) | 0.032 | 29% | 7,200,000 | 46% |
| Hemispheres | 0.023 | 21% | 6,000,000 | 38% |
| Olfactory Bulb | 0.006 | 5.5% | 1,200,000 | 8% |
Choroid Plexus of 3rd
Ventricle and Epiphysis | 0.003 | 2.5% |
| Diencephalon (Thalamus and Hypothalamus) | 0.013 | 12% | 600,000 | 4% |
| Mesencephalon (Middle Brain) | 0.022 | 20% | 1,276,000 | 8% |
| Tectum | 0.015 | 14% | 876,000 | 5.5% |
| Tegmentum | 0.007 | 6% | 400,000 | 2.5% |
| Cerebellum | 0.001 | 1% | 730,000 includes 6,000 Purkinje | 5% |
| Brain Stem | 0.016 | 15% | 6,000,000 | 38% |
| Spinal Cord | 0.025 | 23% |
| | | | |
| Total | 0.109 | 100% | 15,800,000 | 100% |