The central nervous system is made up of the spinal cord and brain and is the central processing center for all stimuli. Peripheral nervous tissue consists of nerves made up of nerve cells called neurons. Nerves extend all over the body, from the tips of the fingers to internal organs.They form a long line of connectivity, like a chain of paper clips linked together.ervous tissue is composed of three main parts: nerves, the spinal cord and the brain. The primary function of nervous tissue is to receive stimuli and send the impulse to the spinal cord and brain.
Medical model is a term in psychology, indicating the assumption that abnormal behavior is the result of physical problems and should be treated medically. Sometimes this is clearly true, as with traumatic brain injury.
A use case model is a business analysis presentation of the steps defining the interactions between a user (called an actor) and a system (usually a computer system). It details the interactions and sets the expectations of how the user will work within the system.