An electromagnetic coil is an electrical conductor such as a wire in the shape of a coil, spiral or helix. Electromagnetic coils are used in electrical engineering, in applications where electric currents interact with magnetic fields, in devices such as inductors, electromagnets, transformers, and sensor coils.
Causes of lower back spasms. Back spasms can be the result of injuries to the muscles, tendons, and ligaments in the back or it can be related to more serious medical conditions. Heavy lifting is a common cause of back spasms. Any activity that puts excessive strain on the muscles and ligaments in the lower back can cause an injury.
What causes it? The most common causes of neck cramps or spasms are torticollis, sprain or strain, and muscle spasm. Within all the people who go to their doctor with neck cramps or spasms, 67% report having neck pain, 46% report having back pain, and 33% report having shoulder cramps or spasms.