Critical Care Registered Nurse (CCRN) Practice Exam

What sensation is tested using a cotton ball on the head?

1. Balance sensation

2. Touch sensation

3. Temperature sensation

4. Pressure sensation

The correct answer is: Touch sensation

The correct answer highlights the assessment of touch sensation, particularly when using a cotton ball on the head. This method evaluates the ability of the individual to perceive light tactile stimuli. The cotton ball provides a soft stimulus that allows healthcare providers to determine whether the sensory pathways for touch are intact. It is a standard part of neurological examinations to assess the function of peripheral nerves and sensory pathways. In this context, testing touch sensation is essential for identifying potential neurological issues. The other sensations listed, such as balance, temperature, and pressure, involve different testing methods and serve to assess distinct aspects of sensory perception. For instance, balance sensation typically involves tests where the individual’s ability to maintain position or stability is evaluated, usually through dynamic or static balance assessments. Temperature sensation would be tested using warm and cold objects, while pressure sensation involves applying varying degrees of force to determine sensitivity. Each of these sensations requires different approaches and stimuli, reinforcing the importance of understanding how each is classified and tested separately.