Brain atrophy is prone to causing drowsiness, indeed this is true. Because it can be caused by insufficient brain blood supply or cerebral infarction. In fact, brain atrophy is an imaging change, identified by CT or MRI scans, which indicate such atrophy. Clinically, it mainly affects dementia, poor memory, or some may exhibit psychological symptoms, and even poor sleep quality, as well as drowsiness. Drowsiness is caused by insufficient blood supply or poor excitability, so these are clear symptoms of brain atrophy. Symptomatic medications can be used, and if there are mental and psychological issues, it is advised to seek guidance from professional doctors and consult specialists.