Brahmi- Centella Asiatica

A recent study carried out by a researcher at the King's College, London, and Jadavpur University in Kolkata found that plants used in the ancient Ayurvedic therapy may be very efficient and successfully used in modern therapy, too. British and Indian scientists reported excellent results of Ayurvedic traditional herbs against symptoms which are common in Alzheimer's disease, such
as decline of mental abilities, poor memory and concentration etc.

Ayurvedic plants, including Brahmi, prevent the breakdown of neurotransmitter and also boost mental agility and the cognitive function. "However, it is too early to say that we have found a solution to Alzheimer's. That would be too tall a claim.We are just trying and all we can say is we are on the right track. There is a lot of difference between lab experiments and actual human applications. Only when we are able to reach the second stage can we claim we have reached somewhere. Also, we will have to consider the alternative manufacturing aspects," explained the executive council member of Jadavpur University, Partha Pratim Biswas.
http://news.softpedia.com/news/Ayurvedic-Plants-May-Be-the-Cure-for-Alzheimer-039-s-Disease-34904.shtml

The whole plant is alterative, cardio-depressant, hypotensive, weakly sedative and tonic[240]. It is a rejuvenating diuretic herb that clears toxins, reduces inflammations and fevers, improves healing and immunity, improves the memory and has a balancing effect on the nervous system[147, 152, 238, 240]. It has been suggested that regular use of the herb can rejuvenate the nervous system and it therefore deserves attention as a possible cure for a wide range of nervous disorders including multiple sclerosis
http://www.ibiblio.org/pfaf/cgi-bin/arr_html?Centella+asiatica