Prof. Tony Barker (Dept. of Medical Physics and Clinical Engineering, Royal Hallamshire Hospital, Sheffield) will describe how we are all exposed, on a daily basis, to electromagnetic fields from a variety of sources. Some of these exposures are intentional; others are an indirect consequence of a range of technologies.
One intentional exposure uses large pulses of magnetic field to stimulate nerves and the human brain, by inducing currents in the body. In the twenty-five years since its first practical demonstration transcranial magnetic nerve stimulation (TMS) has become widely used in neurophysiology, psychology and psychiatry as well as other disciplines. This talk gives a brief overview of the technique and includes a live demonstration of this very real effect of an electromagnetic field.