What does the cathode represent in an electrotherapy device?

The cathode in an electrotherapy device is considered a negative electrode. This is because, during electrochemical reactions, the cathode is where reduction occurs, meaning it gains electrons. In the context of electrotherapy, the cathode plays a crucial role by attracting positively charged ions (cations) from the surrounding tissue. This allows for various therapeutic effects, such as reducing inflammation, promoting healing, or delivering medication transdermally.

The definition of the cathode as a negative electrode is foundational in understanding how electrotherapy works in various treatments. This understanding is critical for effective application in clinical settings, as practitioners can utilize the cathode’s properties to achieve desired physiological outcomes.