Nervous System

• Nervous System - connects all your body parts and transmits signals from one part to another
• Nervous System - is a system of cells, tissues, and organs that regulates the body's responses to internal and external stimuli
• MAJOR DIVISIONS of NERVOUS SYSTEM

  1. Central Nervous System
  2. Peripheral Nervous System
• Central Nervous System - serves as the main processing center for the entire nervous system.
• MAIN COMPONENTS OF CNS:

  1. Brain
  2. Spinal Cord
• Brain - This is an organ located within the skull that functions as an organizer and distributor of information for the body.
• 3 MAIN PARTS OF THE BRAIN:

  1. Cerebrum
  2. Cerebellum
  3. Brain Stem
• Cerebellum - the part under the cerebrum that controls posture, balance, and coordination.
• Cerebrum - large, the upper part of the brain that controls activity and thought.
• Brain stem - connects to spinal cord; controls vital life processes such as breathing, heartbeat, blood pressure, digestion, sleep, etc.
• Peripheral Nervous System - connects the central nervous system to the organs and limbs.
• Spinal Cord - This serves as a channel for signals between the brain and the rest of the body and controls simple musculoskeletal reflexes without input from the brain.
• 2 MAIN DIVISIONS OF PNS

  1. Somatic Nervous System
  2. Autonomic Nervous System
• Autonomic Nervous System - This system is associated with the involuntary control of body movements.
• Somatic Nervous System - This system is associated with the voluntary control of body movements
• 2 PARTS OF SNS:

  1. Cranial Nerves
  2. Spinal Nerves
• Spinal Nerves - the nerves that carry motor and sensory signals between the spinal cord and the body.
• Cranial Nerves - the nerve fibers that carry information into and out of the brain stem.
• Parasympathetic - it maintains body functions and restores the body to normal or relaxed mode.
• Sympathetic - it is activated when the body is in a dynamic role or stress.
• 2 SUBDIVISION OF ANS

  1. Sympathetic
  2. Parasympathetic