Fenik, Victor B REM sleep-like atonia of hypoglossal (XII) motoneurons is caused by loss of noradrenergic and serotonergic inputs. [electronic resource] - American journal of respiratory and critical care medicine Nov 2005 - 1322-30 p. digital Publication Type: Journal Article ISSN: 1073-449X Standard No.: 10.1164/rccm.200412-1750OC doi Subjects--Topical Terms: Adrenergic Antagonists--pharmacologyAnimalsCholinergic Antagonists--pharmacologyHypoglossal Nerve--cytologyMethysergide--pharmacologyMotor Neurons--pathologyNorepinephrine--metabolismPrazosin--pharmacologyRatsRats, Sprague-DawleyReceptors, Neurotransmitter--drug effectsRespiratory Muscles--innervationSerotonin--metabolismSleep, REM--physiology