Magnetic field

A magnetic field is a physical vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. It is not a biological molecule, receptor, or enzyme, and thus does not fit the standard definition of a pharmacological target. However, magnetic fields are extensively utilized in medicine as diagnostic tools (MRI) and therapeutic modalities (TMS, PEMF). Biological systems may interact with magnetic fields through specialized proteins such as cryptochromes, which are proposed to mediate magnetoreception via radical pair chemistry [2][4]. In a therapeutic context, magnetic fields are used to non-invasively modulate neuronal activity or promote tissue healing. For instance, Transcranial Magnetic Stimulation (TMS) targets specific brain regions like the dorsolateral prefrontal cortex to treat drug-resistant depression by inducing focal electrical currents [3][5]. While magnetic fields themselves are not 'drugged' in the traditional sense, their biological effects are a subject of significant interest in biophysics and neurology. Because the input refers to a physical phenomenon rather than a molecular structure, it is categorized as an incorrect target for standard drug-receptor annotation [1][6].

Other names

B-fieldMagnetic flux densityElectromagnetic field (EMF)Pulsed electromagnetic field (PEMF)

Magnetic fields interact with biological systems primarily through three mechanisms: magnetic induction, which generates electric fields and currents in conductive tissues (e.g., neurons); magneto-mechanical effects, where high-gradient fields exert torque on paramagnetic molecules or particles; and electronic interactions, such as the radical pair mechanism which affects the spin state of chemical intermediates in proteins like cryptochromes [1][2]. In clinical practice, Transcranial Magnetic Stimulation (TMS) uses rapidly oscillating magnetic fields to induce electrical depolarization of cortical neurons to treat psychiatric conditions [3].