صوت مشترک

One of the most striking characteristics of a sleeping animal or person is that they do not respond normally to environmental stimuli. If you open the eyelids of a sleeping mammal the eyes will not see normally — they _________. Some visual information apparently gets in, but it is not normally processed as it is shortened or weakened; same with the other sensing systems. Stimuli are registered but not processed normally and they fail to wake the individual