Much of what is known about brain function is owed to Roger Sperry, whose experiments examined the way the human brain’s hemispheres operate both independently and in concert with each other. The two hemispheres communicate information, such as sensory observations, to each other through the thick corpus callosum that connects them.
In general, the left hemisphere is dominant in language: processing what you hear and handling most of the duties of speaking. It’s also in charge of carrying out logic and exact mathematical computations. When you need to retrieve a fact, your left brain pulls it from your memory.
The left brain is generally associated with the inner chatter, the “talking” voice in your mind. Often compared to a serial processor in computing, the left brain evaluates facts one at a time in a sequence.
The right hemisphere is mainly in charge of spatial abilities, face recognition and processing music. It performs some math, but only rough estimations and comparisons. The brain’s right side also helps you comprehend visual imagery and make sense of what you see. It plays a role in language, particularly in interpreting communication not coded in speech.
The right brain is generally associated with spirituality, the “quiet voice” that often communicates through imagery. The right brain is analogous to a parallel computer processor running many things simultaneously. The right brain is regarded as the seat of the sub-conscious mind and intuition.
Many people (men mostly) become dominated by the left-brain processing, identify with thoughts in their minds, and completely ignore the more powerful quiet voice of intuition. Floating and meditation restore balance to hemisphere processing by training the left-brain to work with and accept input from the powerful right brain.
Floating balances the hemispheres and enables a more holistic approach to thinking and problem-solving.