Neuromagnetism at BioMag

Instrument

• Basic technology developed at the Low Temperature Laboratory of the Helsinki University of Technology
• SQUIDS developed and manufactured by the Technical Research Centre of Finland
• Developed and built by Elekta Neuromag Ltd.
• 102 three-channel units (1 magnetometer and 2 gradiometers in each)
• 16.5-mm baselength (gradiometers)
• Narrow sensitivity pattern
• Able to see deep sources
• Excellent balance and calibration
• Signal maximum right above a source (gradiometers)
• High signal-to-noise ratio

Current MEG projects

• Auditory, somatosensory and visual evoked fields
• Spontaneous activity (coherence, desynchronization)
• Auditory sensory memory
• Language studies
• Presurgical localization of eloquent cortex and epileptic foci
• Psychopharmacological studies
• Alzheimer's disease
• Psychiatric disorders
• Recovery from stroke
• Combination of MEG and fMRI
• Study of the effect of anisotropy on MEG & EEG inverse problem and on TMS
• Developmental studies