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RESEARCH PRODUCT
Finger movements induced by transcranial magnetic stimulation change with hand posture, but not with coil position
Alvaro Pascual-leoneEric M. WassermannJosé-maria Tormossubject
AdultMalemedicine.medical_specialtyMovementmedicine.medical_treatmentPostureIsometric exerciseWristThumbBrain mappingArticleFingersPhysical medicine and rehabilitationIsometric Contractionmental disordersmedicineHumansRadiology Nuclear Medicine and imagingBrain MappingRadiological and Ultrasound TechnologyElectromyographyIndex fingerAnatomyHandTranscranial Magnetic Stimulationbody regionsTranscranial magnetic stimulationmedicine.anatomical_structureNeurologyElectromagnetic coilNeurology (clinical)AnatomyPsychologypsychological phenomena and processesMotor cortexdescription
We attempted to map the representations of movements in 2 normal subjects by delivering five transcranial magnetic stimuli (TMS) with a focal coil to each of a grid of positions over the primary motor area (M1). Isometric forces were recorded from the contralateral index finger. Maps were made with the hand in a semiflexed “neutral” position, and with the thumb and index finger opposed in a “pincer” grip. The electromyogram (EMG) was monitored to ensure relaxation. The wrist was immobilized. In the neutral position, TMS at almost all positions produced abduction. Flexion was produced in the pincer position. Thus, while sensitive to changes in posture, TMS mapping may not be sensitive to the topographical organization of the M1 by movements as detected with direct cortical stimulation. Hum. Brain Mapping 6:390–393, 1998. © 1998 Wiley‐Liss, Inc.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1998-10-27 | Human Brain Mapping |