Synergisms between pharmacological agents and endogenous neurotransmitters are familiar and frequent. The present review describes the experimental evidence for interactions between neuropharmacological compounds and the classes of weak magnetic fields that might be encountered in our daily environments. Whereas drugs mediate their effects through specific spatial (molecular) structures, magnet...

Atomic magnetometers are emerging as an alternative to SQUID magnetometers for detection of biological magnetic fields. They have been used to measure both the magnetocardiography (MCG) and magnetoencephalography (MEG) signals. One of the virtues of the atomic magnetometers is their ability to operate as a multi-channel detector while using many common elements. Here we study two configurations...

Event-related desynchronization (ERD) is attenuation in the amplitude of oscillations in specific frequency that occurs in relation to a specific neural activity [1]. The opposite phenomenon, event-related synchronization (ERS), is an increase in the amplitude [2]. A previous MEG study demonstrated that ERD occurs in alpha and beta bands following electrical stimulation of the median nerve or s...

OBJECTIVE To evaluate lip sensory dysfunction in patients with inferior alveolar nerve injury by lip-stimulated somatosensory evoked fields (SEFs). METHODS SEFs were recorded following electrical lip stimulation in 6 patients with unilateral lip sensory disturbance and 10 healthy volunteers. Lip stimulation was applied non-invasively to each side of the lip with the same intensity using pin e...

Due to their extremely weak intensity, biomagnetic fields are usually detected by means of superconducting interference devices (SQUID) which are currently the most sensitive magnetic sensors available. To reduce construction and running costs, extensive efforts have been dedicated to the development of High-Tc SQUIDs working at liquid nitrogen temperature and suitable for biomagnetic applicati...

Some forms of tinnitus are likely to be perceptual consequences of altered neural activity in the central auditory system triggered by damage to the auditory periphery. Animal studies report changes in the evoked responses after noise exposure or ototoxic drugs in inferior colliculus and auditory cortex. However, human electrophysiological evidence is rather equivocal: increased, reduced or no ...

BACKGROUND The latency and amplitude of visual evoked cortical responses are known to be affected by refractive states, suggesting that they may be used as an objective index of refractive errors. In order to establish an easy and reliable method for this purpose, we herein examined the effects of refractive errors on visual evoked magnetic fields (VEFs). METHODS Binocular VEFs following the ...