The document summarizes the structure and function of the human brain and nervous system. It describes that the nervous system consists of the central nervous system (CNS) and peripheral nervous system (PNS). The CNS is made up of the brain and spinal cord. The brain can be divided into the forebrain, midbrain, and hindbrain. The forebrain includes the cerebrum, thalamus, and hypothalamus. The cerebrum is made up of two hemispheres and is involved in higher functions. The midbrain connects the forebrain to the hindbrain. The hindbrain includes the cerebellum, pons, and medulla and is involved in balance, movement, and automatic functions.