| abstract |
Disclosed is a dried plant tissue or a plant tissue extract having a nonconventional significant ameliorating effect on central nervous system degenerative diseases, particularly Alzheimer's disease and Parkinson's disease. Specifically disclosed are a dried plant tissue and a plant tissue extract each having a nonconventional significant anti-Alzheimer's disease activity and/or a nonconventional significant anti-Parkinson's disease activity. Also disclosed is a pharmaceutical agent and a food or beverage for ameliorating central nervous system degenerative diseases, particularly for enhancing the ability of acquiring, maintaining and recalling memory, which comprises the dried plant tissue or the plant tissue extract. |