PSY 120 Lecture Notes - Lecture 4: Adult Stem Cell, Peripheral Nervous System, Autonomic Nervous System
Document Summary
Chapter 4: the brain: source of mind and self. Two components: brain & spinal cord: spinal cord is a bridge between the brain and parts of the body below the neck, spinal nerves protected by the spinal column, enables spinal reflexes. Contains two subdivisions (messages carried through sensory & motor nerves): somatic nervous system: nerves connected to sensory receptors and skeletal muscles, autonomic nervous system: regulates functioning of blood vessels, glands, & internal organs. Contains the sympathetic & parasympathetic nervous systems. Nervous system made up of: neurons: cells that conduct electrochemical signals; basic unit of the nervous system. Sensory, motor, interneuron: glia: cells that support, nurture, and insulate neurons, remove debris when neurons die, enhance the formation & maintenance of neural connections, and modify neural functioning. Approximately 100 billion neurons in the brain. Dendrites branch-like fibres that receive information from other neurons & transmit towards cell body.
