Physical and psychological problems are philosophical questions about thought and consciousness in human thinking and the relationship with the brain as part of the body. It is very different from how the body and the body work in chemistry and physiology, as this problem is based on interactionist on the body and mind. This problem occurs when the mind and body are regarded as unique, based on the assumption that the mind and body are fundamentally different fundamentally.
Understanding the relationship between the brain and thinking - thought - the physical problem is one of the central problems in the history of philosophy - is a challenging issue in both philosophy and science. There are three major philosophical schools of thinking about answers: dualism, materialism, and idealism. Dualism thinks that the mind is independent of the existence of the brain, materialism thinks psychological phenomena are consistent with neuro phenomena, idealism thinks that only psychological phenomena exist
At first, philosophers thought thought and brain were separate. It is called dualism. The theory of dualism thinks thinking and brain are composed of different substances. The brain is material, the brain is not important, or it is irrelevant to the physical world. However, when scientists started studying the brain in the early 19th century, there was a monism. This theory thinks thinking and brain are one thing. In the past, philosophers knew little about how the brain works, or its behavior. However, some early scientists began to make important discoveries about monism. Their experiments show that the physical process is very important for understanding behavior.