Search results for "Intracortical circuit"

showing 2 items of 2 documents

Interhemispheric inhibition is dynamically regulated during action observation

2016

International audience; It is now well established that the motor system plays a pivotal role in action observation and that the neurophysiological processes underlying perception and action overlaps. However, while various experiments have shown a specific facilitation of the contralateral motor cortex during action observation, no information is available concerning the dynamics of interhemispheric interactions. The aim of the present study was, therefore, to assess interhemispheric inhibition during the observation of others' actions. We designed a transcranial magnetic stimulation (TMS) experiment in which we measured both corticospinal excitability and interhemispheric inhibition, this…

0301 basic medicineMalemedicine.medical_treatmentcorpus-callosumPyramidal TractsCorticospinal excitabilitFunctional Laterality0302 clinical medicinehuman motor cortextranscallosal inhibitionInterhemispheric inhibitiontranscranial magnetic stimulationAction observation Corticospinal excitabilit; Interhemispheric inhibition Movement kinematics Transcranial magnetic stimulation Adult Evoked Potentials Motor Female Functional Laterality Hand Strength Humans Male Motor Cortex Movement Muscle Skeletal Pyramidal Tracts Rest Transcranial Magnetic Stimulation Young Adult Neuropsychology and Physiological Psychology Experimental and Cognitive Psychology Cognitive NeuroscienceEvoked Potentialsvoluntary movementHand StrengthMotor CortexAction observationSkeletalCorticospinal excitabilitymedicine.anatomical_structureNeuropsychology and Physiological PsychologyMotormultiple-sclerosiscortical areasMuscleFemalePsychologyMotor cortexAdultCognitive NeuroscienceMovementRestipsilateral silent periodExperimental and Cognitive PsychologyInhibitory postsynaptic potential03 medical and health sciencesYoung AdultMotor systemmedicineHumansMuscle SkeletalPyramidal tractsNeurophysiologyEvoked Potentials MotorTranscranial magnetic stimulation030104 developmental biologyAction (philosophy)[ SDV.NEU ] Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]Silent periodMovement kinematicsNeuroscienceintracortical circuits030217 neurology & neurosurgery
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Intracortical inhibition and facilitation in human facial motor area: difference between upper and lower facial area.

2001

Objective: To investigate the intracortical inhibitory and excitatory systems in the motor cortical representation of upper and lower facial muscles. Methods: Paired-pulse transcranial magnetic stimulation (TMS) was applied to 7 healthy volunteers, with the interstimulus interval (ISI) between the conditioning stimulus (CS) and test stimulus, varied from 1 to 20 ms. CS was set at 90% of motor threshold. Muscle evoked potentials (MEPs) were recorded from first dorsal interosseus (FDI), orbicularis oculi (o. oculi) and mentalis muscles. Result: TMS evoked MEPs in o. oculi on both ipsi- and contralateral sides in all subjects. In the paired-pulse study, MEP amplitude in the mentalis decreased …

AdultMaleIntracortical circuitmedicine.medical_treatmentFacial MusclesStimulus (physiology)MagneticsReference ValuesPhysiology (medical)medicineReaction TimeHumansInhibitionOrbicularis oculi muscleInterstimulus intervalMotor CortexMotor controlNeural InhibitionEvoked Potentials MotorSensory SystemsElectric StimulationTranscranial magnetic stimulationFacial muscleFacial musclesmedicine.anatomical_structureNeurologyMentalisFacilitationsense organsNeurology (clinical)PsychologyNeuroscienceTranscranial magnetic stimulationMotor cortexClinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology
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