The New Human Line has the capacity to voluntarily adjust and regulate the excitatory neurotransmitter, glutamate, in the central nervous system, while current humans do not. Glutamate is the most abundant excitatory neurotransmitter in the central nervous system. It is the major neurotransmitter in sensory neurons. Most of the excitatory synapses in the brain release glutamate. As in the other nervous system, the patterns and functions of these neurotransmitter receptors can be distinguished through pharmacological manipulation. Besides metabotropic receptors, glutamate also acts on ionotropic receptors, which are located on ionophoric proteins and can directly affect the flow of ions across the cell membrane. The NMDA receptor is one of the ionotropic glutamate receptors and involves in learning, memory, and neural development. Many cases of epilepsy, stroke, brain damage, and other nerve injuries caused by hypoxia may be related to this receptor. Some mind-affecting drugs such as Angel Dust (phencyclidine, PCP) can work on NMDA receptors.