The BioMag Laboratory at Helsinki University Hospital is a center for magnetoencephalography (MEG), magnetocardiography (MCG), and transcranial magnetic stimulation (TMS).

In MEG and MCG, the feeble magnetic fields produced by the brain or the heart are measured with sophisticated SQUID magnetometers inside a magnetically shielded room (MSR). TMS is the converse of MEG: The brain is stimulated through the skull with magnetic fields. In parallel, Near InfraRed optical Spectroscopy (NIRS), an emerging non-invasive imaging modality, is also developed and applied.