The term "open-focus brain" typically refers to a state of mind characterized by relaxed attention and expanded awareness. It was introduced by Dr. Les Fehmi, a psychologist and neurofeedback researcher. The open-focus brain state involves being aware of multiple stimuli and sensations without fixating on any particular one. This state is often associated with reduced stress, increased creativity, and improved cognitive performance. It can be achieved through specific techniques such as meditation, mindfulness, and neurofeedback training.