Electrodes for medical use; Microscopes for surgical operations; MRI apparatus for medical purposes; Transcranial magnetic stimulation apparatus for the treatment of central nervous system disorders; Electroencephalography kit consisting of an electrode headset, a digital recorder and transmitter, a tablet computer monitor, and printed instructions for use in medical settings including emergency departments, ambulances, intensive care units, and physician's offices; Medical electrodes; Medical apparatus and instruments for use in positron emission tomography (PET) imaging; Medical apparatus and instruments for use in positron emission tomography (PET) imaging used to monitor brain, heart and metabolic functions; Medical equipment accessories, namely, electrodiagnostic automated constant current sinusoid waveform neuroselective sensory nerve testing devices, namely, disposable electrodes; Medical equipment, namely, computed tomography (CT) apparatus