Final answer:
Electromyography (EMG) is used to study neural activation in muscles for both clinical assessments and research, using surface or intramuscular electrodes.
Step-by-step explanation:
Electromyography (EMG) is a common research tool used to examine the neural activation within a muscle. EMG can be conducted using surface electrodes placed on the skin or with wires inserted directly into the muscle. This tool is essential in a variety of research areas, particularly in studies looking to understand muscle function and neurophysiological conditions. Electromagnetic techniques such as EMG, along with other methodologies like EEG, fMRI, and TMS, play crucial roles in neuromodulation, brain activity monitoring, and cognitive and medical research.