Magnetic field by that loop. Ampère's law is always valid for steady currents and can be used to calculate the -field for certain highly symmetric situations such as an infinite wire or an infinite solenoid. In a modified form that accounts for time varying electric fields, Ampère's law is one of four Maxwell's equations that describe electricity and magnetism. A charged particle moving in a -field experiences a "sideways" force that is proportional to the strength of the magnetic field, the component of the velocity that is perpendicular to the magnetic field and the charge of the particle. This force is known
High-Intensity Focused Electromagnetic Field muscle contractions due to the action potential. The exposure of muscles to these contractions leads to muscle strengthening. In aesthetic medicine, HIFEM is used as a non-invasive body contouring treatment for abdomen and buttocks. The same technology is used in urology and gynecology to treat urinary incontinence through strengthening of the pelvic floor muscles. A pulse of electric current flowing through a wire coil generates a rapidly changing magnetic field. The changing magnetic field induces a secondary electric current in the nearby tissue. When applied on peripheral level the secondary electrical current depolarizes neural membranes of underlying neurons. Motor neurons