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lüll Serotonin and NMDA receptors in respiratory long-term facilitation Ling LRespir Physiol Neurobiol 2008[Dec]; 164 (1-2): 233-41Some have postulated that long-term facilitation (LTF), a persistent augmentation of respiratory activity after episodic hypoxia, may play a beneficial role in helping stabilize upper airway patency in obstructive sleep apnea (OSA) patients. However, the neuronal and cellular mechanisms underlying this plasticity of respiratory motor behavior are still poorly understood. The main purpose of this review is to summarize recent findings about serotonin and NMDA receptors involved in both LTF and its enhancement after chronic intermittent hypoxia (CIH). The potential roles of these receptors in the initiation, formation and/or maintenance of LTF, as well as the CIH effect on LTF, will be discussed. As background, different paradigms for the stimulus protocol, different patterns of LTF expression and their mechanistic implications in LTF will also be discussed.|Animals[MESH]|Hypoxia/*physiopathology[MESH]|Long-Term Potentiation/*physiology[MESH]|Receptors, N-Methyl-D-Aspartate/*physiology[MESH]|Receptors, Serotonin/*physiology[MESH]|Respiratory System/*physiopathology[MESH] |