The number of human senses is still a topic of debate among researchers, and different methods of neurological classification can yield different results. However, most neurologists agree on at least nine senses, which are a group of sensory cells that respond to a specific physical phenomenon and correspond to a particular region of the brain where the signals are received and interpreted. Some researchers believe that humans have as many as 21 senses, and this number does not include some physiological experiences such as hunger or thirst. The commonly agreed senses for neuroscientists currently include:

• Sight
• Smell
• Sound
• Taste
• Touch
• Balance
• Body awareness
• Heat perception
• Pain perception

Other senses that have been proposed include pressure, itch, and proprioception, which is the perception of body awareness. The University of Glasgow suggests that humans have nine senses, which include vision, hearing, touch, taste, smell, pain, mechanoreception (balance, etc.), temperature, and interoreceptors (e.g., blood pressure, bladder stretch) . The number of senses can vary depending on how they are defined and classified, and there is a lot of cross-talk between sensory systems, making it tricky to figure out where one ends and another begins.