2. The nervous system very complex system in the body has many, many parts divided into two main systems -- - central nervous system (CNS) is made of the spinal cord and brain - main job is to get the information from the body and send out instructions - peripheral nervous system (PNS) is made up of all of the nerves and the wiring - sends the messages from the brain to the rest of the body More on next slide

3. Central Nervous System (CNS) The CNS is composed of the brain and spinal cord. The brain has 12 cranial nerves. The spinal cord originates immediately below the brain stem. The spinal cord provides a means of communication between the brain and peripheral nerves. Peripheral Nervous System (PNS) The CNS extends to the Peripheral Nervous System, a system of nerves that branch beyond the spinal cord, brain, and brainstem. The PNS carries information to and from the CNS.

4. The peripheral nervous system (PNS) has several subdivisions. The first level consists of: -somatic nervous system and autonomic nervous system - refers to the nerves just under the skin and the nerves everywhere else - despite their names, both mostly execute automatically, but the autonomic nervous system is responsible for the body’s maintenance functions. The nerves we use to consciously control our bodies are part of the somatic nervous system, but these function automatically even in the event of a coma.

6. Cerebellum - coordinates movement (balance and muscle coordination). Damage can interfere with a person's ability to walk, talk, eat, and to perform other tasks. Frontal Lobe - involved in planning, organizing, problem solving, selective attention, personality and a variety of "higher cognitive functions" including behavior and emotions. Occipital Lobe - processes visual information. Mainly responsible for visual reception and also contains association areas that help in the visual recognition of shapes and colors. Damage to this lobe can cause visual deficits. Parietal Lobe Right - Damage to this area can cause difficulty finding your way around new, or even familiar, places. Parietal Lobe, Left - Damage to this area may disrupt ability to understand spoken and/or written language. The parietal lobes controls sensation (touch, pressure). Temporal Lobe - These lobes allow a person to tell one smell from another and one sound from another. They also help in sorting new information and are believed to be responsible for short-term memory. Right Lobe - Mainly involved in visual memory. Left Lobe - Mainly involved in verbal memory

7. Ruler Lab In this lab, you will be comparing the rate at which sensory neurons, working through the brain, can elicit responses via motor neurons. We will also be mapping out the density of sensory neurons on the skin. Reflexes are a major part of this lab

8. A reflex is an involuntary action that our body does without thinking. Some examples of this include: -pulling your hand away from a hot object -closing your eyes when you look into a bright light. Reflexes are controlled by the spinal cord. It works when the spinal cord sends a message to the muscle telling it to react. Even something as simple as blinking, sneezing or even coughing is considered a reflex.