UNIT 9 Sensory needs Sensory Needs. Introduction to Sensory Needs Sensory needs refer to the body’s requirement for appropriate stimulation from the environment through the five senses: vision, hearing, touch, taste, and smell. Proper sensory input is essential for maintaining cognitive function, emotional well-being, and overall health. Any impairment in sensory function can impact communication, mobility, and daily activities, particularly in vulnerable populations such as elderly patients, critically ill patients,