Which of the following is TRUE about local anesthesia?

Which of the following is TRUE about local anesthesia?

• A. There is no conscious awareness.
• B. The central nervous system does not perceive pain.
• C. The loss of sensation only occurs in a specific part of the body.
• D. There is no control of body movements.

Answer: (C)

Local anesthesia works by blocking nerve signals in a defined area, so the patient remains conscious and only the targeted region loses sensation. This is why the statement that the loss of sensation occurs only in a specific part of the body is true. The other options misstate how local anesthesia works: it does not render the whole person unconscious, it blocks pain signals from reaching the brain rather than eliminating the brain’s ability to perceive pain in general, and it does not automatically abolish movement everywhere—motor function may remain intact in the rest of the body.

Local anesthesia works by blocking nerve signals in a defined area, so the patient remains conscious and only the targeted region loses sensation. This is why the statement that the loss of sensation occurs only in a specific part of the body is true. The other options misstate how local anesthesia works: it does not render the whole person unconscious, it blocks pain signals from reaching the brain rather than eliminating the brain’s ability to perceive pain in general, and it does not automatically abolish movement everywhere—motor function may remain intact in the rest of the body.