Neurons put the uncertainty into reaction times.
Barinaga
M
M
D000818:Animals; D005133:Eye Movements; D005625:Frontal Lobe / Q000502:physiology*; D006801:Humans; D008253:Macaca mulatta; D009474:Neurons / Q000502:physiology*; D011597:Psychomotor Performance; D011930:Reaction Time / Q000502:physiology*; D009435:Synaptic Transmission