Kinesthetic illusion of wrist movement activates motor-related areas.
We used positron emission tomography (PET) to test the hypothesis that illusory movement of the right wrist activates the motor-related areas that are activated by real wrist movements. We vibrated the tendons of the relaxed right wrist extensor muscles which elicits a vivid illusory palmar flexion. In a control condition, we vibrated the skin surface over the processes styloideus ulnae, which does not elicit the illusion, using the identical frequency (83 Hz). We provide evidence that kinesthetic illusory wrist movement activates the contralateral primary sensorimotor cortices, supplementary motor area (SMA) and cingulate motor area (CMA). These areas are also active when executing the limb movement.
Naito
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E
Division of Human Brain Research, Department of Neuroscience, Karolinska Institute, Retzius Väg 8 A3:3 S-171 77 Stockholm, Sweden.
Ehrsson
H H
HH
D000328:Adult; D007839:Functional Laterality / Q000502:physiology; D006179:Gyrus Cinguli / Q000000981:diagnostic imaging*; D006801:Humans; D007088:Illusions / Q000502:physiology*; D007699:Kinesthesis / Q000502:physiology*; D009044:Motor Cortex / Q000000981:diagnostic imaging*; D009068:Movement / Q000502:physiology*; D010812:Physical Stimulation; D013003:Somatosensory Cortex / Q000000981:diagnostic imaging*; D014055:Tomography, Emission-Computed; D014732:Vibration; D014953:Wrist / Q000294:innervation* / Q000502:physiology