Final answer:
Electromyography (EMG) is the diagnostic procedure used to detect muscle weakness. It measures the electrical activity in muscles and can help identify muscular disorders.
Step-by-step explanation:
The diagnostic procedure used to detect muscle weakness is Electromyography (EMG). EMG measures the electrical activity in muscles and can help identify muscular disorders. It involves inserting a needle electrode into the muscle to record the electrical signals produced by the muscle fibers. This test can provide valuable information about the health and function of muscles.