0:00dementia is a chronic state of confusion in which the patient finds it hard to
0:05remember
0:05learn and communicate it is also characterized by the formation
0:11of senile plaque involving the accumulation of beta-amyloid
0:15and abnormal neural fibrillary tangles beta ameloid is derived from a larger
0:21molecule called
0:22amyloid precursor protein or appt
0:26appt is normally present on the cell surface is
0:30and the cleavage Ave pp results in the formation