Dreams are a series of images, ideas, thoughts, emotions and sensations occurring involuntarily in the mind during certain stages of sleep. They have been described physiologically as a response to a neural process when the person is asleep
while the psychological basis proposed is that they are because of reflection of the subconscious mind. Pharmacologists are of the view that medications, many hormones, neurotransmitters, herbs and supplements can alter dreams and make them
more or less vivid.
The content and purpose of dreams are not fully understood
although they have been a topic of interest since ages.
The scientific study of dreams is known as oneirology more