Since the discovery of the brain receptors for the excitatory amino ac
id neurotransmitters in the mid-sixties, significant progress has been
made in the study and discovery of several classes of these receptors
; of which the N-methyl-D-aspartate (NMDA) is the most extensively stu
died, The characteristic and neurophysiological role of these receptor
s NMDA receptors and outline the progress made in this field with refe
rence to possible clinical applications of some modulators of these re
ceptors in the treatment of some forms of epilepsy, Parkinsonism, Alzh
eimer's disease, amyotrophic lateral sclerosis and possibly in other n
eurological disorders.