A hallucination is an experience of something that does not exist, a perception of something in the absence of an external stimulus that has qualities of a real one. It can involve any of our five senses, and for this reason we can divide hallucinations into five groups: Visual hallucinations – seeing flashing lights, people, animals or objects. Auditory hallucinations – hearing voices or footsteps. Olfactory hallucinations – smelling things such as smoke or perfume Tactile hallucinations –...

The human brain is the master regulator in charge of receiving, interpreting, and responding to various sensory inputs from the environment. However, disturbances of this process have an effect on general brain health and can manifest as hyper-sensitivity, or hypo-sensitivity thereby impinging upon an individual's capacity to function optimally in daily life. The five senses: sight, smell, touch, taste and hearing. The “sensory diet” is not food but a program of structured activities...

Our brain is considered a “protected” organ in the body since it is surrounded by an anatomical structure, made of different cell types that controls what can go inside and what can exit. The structure is called “the blood brain barrier” and as the name suggests, it is a “barrier” that acts like a gatekeeper to the brain. Normally, it keeps harmful things out and hold “good” things in. It also controls how various chemical molecules (including compounds we need or even make ourselves) enter...