the ravages of time on the human brain - aging brain and neurodegenerative diseases - conceptual

age aging als alzheimers amnesia amyloid amyotrophic apathy atrophy beta brain cognition cognitive complications concussion decline demyelinating depression disease diseases disorder forgetfulness function huntingtons impairment injury lapse lateral loss memory mood multiple neurodegeneration neurodegenerative neurologic neurological neurology neuronal parkinsons prevention prion processing progressive proteins psychology reasoning sclerosis speed symptoms system tau thinking time