21. Burst episodes are associated with excitatory activity in cortical neurons. 22. In 2007, an excitatory GABAergic system was described in the airway epithelium. 23. AMPA generates fast excitatory postsynaptic potentials ( EPSP ). 24. These non-retinal inputs can be excitatory , inhibitory, or modulatory. 25. The excitatory neurotransmitter glutamate is now also thought to be associated with schizophrenia. 26. Glutamate is the primary excitatory transmitter for the reflex. 27. The neurotransmitter released is glutamate, a neurotransmitter whose receptors are often excitatory . 28. Glutamate is an excitatory neurotransmitter capable of causing a metabolic injury to neurons. 29. Both types of summation are the result of adding together many excitatory potentials. 30. Eupneic activity is generated using the excitatory mechanism through the NMDA glutamate receptor.