'C02H in both the induction of LTP (long term potentiation, a current model of mem01-y)~ and in the neuronal degeneration resulting from the ischemic conditions accompanying a stroke or heart attack. 6 The latter state is presumably reached when excessive amounts of the excitatory amino acids, glutamate or aspartate, are released, leading to an over- stimulation of NMDA receptors with consequent alterations in the calcium fluxes. ...