After hot dogs are purchased, they may be kept refrigerated for about 1 week after the sell-by date on the package if it has been properly stored. Unopened hot dogs may be kept in their original store packaging when refrigerating; to maximize the shelf life of hot dogs, do not open the package until ready to use.
Definition. 1  Electromyography (EMG) is an electrical recording of muscle activity that aids in the diagnosis of neuromuscular disease. 2  Muscles are stimulated by signals from nerve cells called motor neurons. This stimulation causes electrical activity in the muscle, which in turn causes contraction. This electrical activity is detected by a needle electrode inserted into the muscle and connected to a recording device. Together, the electrode and recorder are called an electromyography machine.
Normal: The EMG recording shows no electrical activity when the muscle is at rest. There is a smooth, wavy line on the recording with each muscle contraction. The nerve conduction studies show that the nerves send electrical impulses to the muscles or along the sensory nerves at normal speeds, or conduction velocities.