Non-invasive imaging of neuronal population dynamics in human thalamus.
Waveforms for early thalamic and cortical population responses to unilateral median nerve stimulation at the wrist were determined non-invasively for six subjects from 122-channel magnetoencephalographic data. Biphasic responses in contralateral ventral thalamus were obtained in 9 hemispheres similar to depth-electrode results reported for patients. Thalamic responses occurred at 15.1-17.4 and at 19.2-24 ms. Responses in contralateral sensorimotor cortex began at 16.3-18.8 ms.
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Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland.
D005071:Evoked Potentials / Q000502:physiology*; D006801:Humans; D015225:Magnetoencephalography; D008475:Median Nerve / Q000502:physiology*; D013788:Thalamus / Q000502:physiology*