Magnetocardiography (MCG) and Magnetoencephalography (MEG) are imaging techniques for mapping magnetic fields produced by electrical activity in the heart and brain, respectively. The techniques are useful for diagnosing abnormal rhythms or arrhythmia in the heart and for studies and treatment of migraine headache and epilepsy. SQUID magnetometers are used at present in such procedures. Recent efforts on low-cost, pico-Tesla multiferroic magnetic sensors that have the potential for medical imaging will be discussed. Deep brain stimulation (DBS) is a technique that involves treatment of brain disorders such as Parkinson's disease, tremors,and obsessive–compulsive disorder (OCD) with the use of electrical pulses.DBS directly changes brain activity in a controlled manner, but the procedure is invasive. This presentation will focus on the potential for magneto-electric nanocomposites for noninvasive treatment of several types of brain disorders.