Brain sensing

How do we explore the secrets of the brain?

Following considerable testing, Cerca Magnetics Ltd – a spin-out company set up by University of Nottingham Hub academics – was launched in 2020, aiming to bring the world’s most advanced brain scanner to research and commercial markets. This brain scanner is specially designed to allow people to move freely whilst being scanned and offers unprecedented window on brain function, giving new hope to people suffering with severe neurological illnesses, such as epilepsy.

Building on these successes, a next-generation of OPM-MEG hardware and shielding have been developed and applied to naturalistic movement, driving skills, motor learning, gait, epilepsy and child neurodevelopment studies. The electronics have been miniaturised into a wearable backpack, and the team’s developments in shielding now allow for significant movement within the shielded room, and multiple simultaneous participants.

Similar techniques are being applied to foetal monitoring. The foetal heart output can be isolated from the mother’s using a foetal magnetocardiography belt, allowing the monitoring of foetal electrophysiological activity and the creation of field maps. Triaxial optically pumped magnetometer (OPM) sensors, from QuSpin, have been designed into OPM magnetoencephalography (MEG) systems which the team have developed and evaluated, concluding that triaxial sensors supersede the initially proposed hybrid approach to interference rejection and differentiation of brain signals from background magnetic fields.