Biomaterial Database

Influence of zopiclone, a new generation hypnotic, on the intermediate stage and paradoxical sleep in the rat. 1997

P Gauthier, and C Arnaud, and J M Stutzmann, and C Gottesmann

Laboratoire de Psychophysiologie, Faculté des Sciences, Université de Nice Sophia Antipolis, France.

This study examined the influence of zopiclone, a third generation hypnotic, on the transition from slow wave sleep to paradoxical sleep (PS) which is increased at the expense of PS by barbiturates and benzodiazepines. The compound decreased sleep latency and increased the latency of the intermediate stage (IS) and PS at 2.5, 5 and 7.5 mg/kg IP. The amount of the IS was decreased because of the decrease in phase number up to 6 h at all doses. PS amount was decreased during 2 h at 2.5 mg/kg and during 4 h at 5 and 7.5 mg/kg also because of the decrease in phase number. The IS never substituted for PS. The IS spindle characteristics were not modified and the theta rhythm frequency slightly decreased at 5 mg/kg (IS) and 7.5 mg/kg (PS).

UI	MeSH Term	Description	Entries
D006993	Hypnotics and Sedatives	Drugs used to induce drowsiness or sleep or to reduce psychological excitement or anxiety.	Hypnotic,Sedative,Sedative and Hypnotic,Sedatives,Hypnotic Effect,Hypnotic Effects,Hypnotics,Sedative Effect,Sedative Effects,Sedatives and Hypnotics,Effect, Hypnotic,Effect, Sedative,Effects, Hypnotic,Effects, Sedative,Hypnotic and Sedative
D008297	Male		Males
D010879	Piperazines	Compounds that are derived from PIPERAZINE.
D004569	Electroencephalography	Recording of electric currents developed in the brain by means of electrodes applied to the scalp, to the surface of the brain, or placed within the substance of the brain.	EEG,Electroencephalogram,Electroencephalograms
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D012894	Sleep Stages	Periods of sleep manifested by changes in EEG activity and certain behavioral correlates; they formerly included Stage 1: sleep onset, drowsy sleep; Stage 2: light sleep; Stages 3 and 4: delta sleep, light sleep, deep sleep, telencephalic sleep. In 2007, sleep stages were redefined by The American Academy of Sleep Medicine (AASM) as: N1-N2 (sleep onset - light sleep), N3 (SLOW-WAVE SLEEP), and REM SLEEP.	N1-Sleep,N2-Sleep,NREM Stage 1,NREM Stage 2,N1 Sleep,N2 Sleep,Sleep Stage,Stage, Sleep,Stages, Sleep
D012895	Sleep, REM	A stage of sleep characterized by rapid movements of the eye and low voltage fast pattern EEG. It is usually associated with dreaming.	Fast-Wave Sleep,Paradoxical Sleep,Rapid Eye Movements,Rhombencephalic Sleep,Sleep, Fast-Wave,REM Sleep,Eye Movement, Rapid,Eye Movements, Rapid,Fast Wave Sleep,Movement, Rapid Eye,Movements, Rapid Eye,Rapid Eye Movement,Sleep, Fast Wave,Sleep, Paradoxical,Sleep, Rhombencephalic
D013826	Theta Rhythm	Brain waves characterized by a frequency of 4-7 Hz, usually observed in the temporal lobes when the individual is awake, but relaxed and sleepy.	Rhythm, Theta,Rhythms, Theta,Theta Rhythms
D017208	Rats, Wistar	A strain of albino rat developed at the Wistar Institute that has spread widely at other institutions. This has markedly diluted the original strain.	Wistar Rat,Rat, Wistar,Wistar Rats
D017286	Polysomnography	Simultaneous and continuous monitoring of several parameters during sleep to study normal and abnormal sleep. The study includes monitoring of brain waves, to assess sleep stages, and other physiological variables such as breathing, eye movements, and blood oxygen levels which exhibit a disrupted pattern with sleep disturbances.	Monitoring, Sleep,Somnography,Polysomnographies,Sleep Monitoring,Somnographies