Search

Your search keyword '"Rossini, P.M."' showing total 478 results
Start Over Author "Rossini, P.M."
478 results on '"Rossini, P.M."'

478. Reduction of transcallosal inhibition upon awakening from REM sleep in humans as assessed by transcranial magnetic stimulation

Author

Flavia Pauri, Paolo Maria Rossini, Riccardo Cristiani, Fabiana Fratello, Luigi De Gennaro, Michele Ferrara, Mario Bertini, Giuseppe Curcio, Vincenzo Romei, Bertini M., De Gennaro L., Ferrara M., Curcio G., Romei V., Fratello F., Cristiani R., Pauri F., and Rossini P.M.

Subjects
Adult, medicine.medical_specialty, medicine.medical_treatment, Corpus callosum, Polysomnography, Rapid eye movement sleep, Sleep, REM, Electroencephalography, Audiology, Non-rapid eye movement sleep, Cerebral hemisphere, Functional Laterality, Neural Pathway, Transcranial magnetic stimulation (TMS), Physiology (medical), mental disorders, Neural Pathways, medicine, Humans, Wakefulness, Slow-wave sleep, medicine.diagnostic_test, musculoskeletal, neural, and ocular physiology, Neural Inhibition, Evoked Potentials, Motor, cerebral hemispheres, corpus callosum, rem sleep, transcallosal inhibition, transcranial magnetic stimulation (tms), Transcranial Magnetic Stimulation, Transcranial magnetic stimulation, medicine.anatomical_structure, Anesthesia, Female, Neurology (clinical), REM sleep, Sleep onset, Transcallosal inhibition, Psychology, psychological phenomena and processes, Motor cortex, Human
Abstract

Study Objectives: The aim of the study is to assess, in humans, transcallosal inhibition upon awakening from rapid eye movement (REM) and non-REM sleep, by paired-pulse transcranial magnetic stimulation (TMS). Design: During the daytime, a baseline session of motor evoked potentials (MEPs) was recorded. During the nighttime, the TMS sessions were administered just before sleep onset and upon awakenings from REM and stage 2 sleep, both in the early and final part of night. Setting: The sleep research laboratory at the University of Rome "La Sapienza." Participants: Ten right-handed subjects participated in the experiment for 4 consecutive sleep-recording nights. Interventions: N/A. Measurements and Results: During the daytime, a robust transcallosal inhibition was found; the MEP amplitude reduction ranged from 35% to 40%. During the nighttime, a decrease of transcallosal inhibition from right-to-left motor cortex, as compared to that from left-to-right motor cortex, was observed. The direct assessment of MEP changes, as a function of sleep stage and of the time of night, pointed to a drop of transcallosal inhibition after awakening from REM sleep. Therefore, the inhibitory activity of transcallosal fibers observed after non-REM awakening almost disappeared after REM sleep awakenings. Conclusions: The drastic drop of transcallosal inhibition after awakenings from REM sleep represents the first evidence in humans of a change of interhemispheric connectivity mediated by the corpus callosum during this sleep stage and may open new avenues for a better understanding of some aspects of sleep mechanisms (ie, dreaming function and dream mentation). Abbreviations: REM, rapid eye movement; MEP, motor evoked potentials; TMS, transcranial magnetic stimulation; EEG, electroencephalogram; ADM muscle, Abductor Digiti Minimi muscle; ISI, interstimulus intervals; MT, motor threshold; IHPP paradigm, interhemispheric paired pulse paradigm; ANOVA, analysis of variance.

Catalog

Books, media, physical & digital resources
See catalog results