Age-related changes in the nervous system.
D000368:Aged; D000375:Aging; D001921:Brain / Q000033:anatomy & histology / Q000378:metabolism; D002490:Central Nervous System / Q000502:physiology*; D002560:Cerebrovascular Circulation; D005851:Geriatric Nursing; D006801:Humans; D008606:Mental Processes; D019965:Neurocognitive Disorders / Q000175:diagnosis; D009929:Organ Size; D012677:Sensation; D009435:Synaptic Transmission