Final answer:
IOPI, or Iowa Oral Performance Instrument, is indeed used strictly in the mouth to assess and enhance oral muscle strength in medical and therapeutic settings.
Step-by-step explanation:
The statement IOPI is strictly used in the mouth is True. The IOPI, which stands for Iowa Oral Performance Instrument, is a device specifically designed to measure the strength of the muscles in the mouth. It is used in medical and therapeutic settings to help diagnose and treat conditions related to oral muscle weakness, such as dysphagia (difficulty swallowing) and speech disorders. By assessing a patient's oral muscle performance, clinicians can develop and monitor the effectiveness of therapy programs tailored to improve oral function.