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Nervous System

By: Aramis Johnson And Nate Sommers. Nervous System. Why is it important?. Master Controller of your body. Translates thought into action. Regulates and maintains functions within your body. Components of Nervous System. CNS(Central Nervous System) Contains brain and spinal cord.

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Nervous System

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  1. By: Aramis Johnson And Nate Sommers Nervous System

  2. Why is it important? • Master Controller of your body. • Translates thought into action. • Regulates and maintains functions within your body.

  3. Components of Nervous System CNS(Central Nervous System) Contains brain and spinal cord. PNS(Peripheral Nervous System) Nerves that extend from brain and spinal cord. Spinal nerves carry impulses to and from the spinal cord. Cranial nerves carry impulses to and from the brain.

  4. CNS Sensory or afferent division has nerve fibers that transport impulses TO the CNS from receptors in the body. Motor or efferent division carries impulses FROM the CNS to effector organs, muscles, and glands. Somatic(SNS)

  5. SNS Allows voluntary control of our skeletal muscles also known as voluntary nervous system. Not all skeletal muscle activity controlled by this system Fibers control skeletal muscle reflexes.

  6. It’s a brain.

  7. Anatomy & Physiology Prosencephalon (Forebrain) Telencephalon Neocortex; Basal Ganglia; Amygdala; Hippocampus; Lateral Ventricles Diencephalon Thalamus; Hypothalamus; Epithalamus; Third Ventricle

  8. Anatomy & Physiology (ctd.) Mesencephalon (Midbrain) Mesencephalon Tectum; Tegmentum; Cerebral Aqueduct Rhombencephalon (Hindbrain) Metencephalon Cerebellum; Pons; Fourth Ventricle Myelencephalon Medulla Oblongata; Fourth Ventricle

  9. ANS (Autonomic Nervous System) Regulates Muscles In the skin Around blood vessels In the eye In the stomach Of the heart Glands Divided into 3 parts Sympathetic nervous system Parasympathetic nervous system Enteric nervous system

  10. Sympathetic “Fight or Flight” response Emergencies that cause stress enable this response Either stay and fight or take flight (run away)

  11. Parasympathetic “Rest and Digest” Non-emergencies enable this response Allows us to rest (sleep, sit down, etc.) and digest food that we have eaten. During this phase, our metabolism kicks in allowing digestion.

  12. Diseases/Disorders Alzheimer's Disease It's not a normal part of aging; it attacks the brain The person will loose normal intellectual brain functions Called dementia

  13. Diseases/Disorders Autism It's symptoms include: Communication problems Repetitive movements Problems with social interaction Unknown cause

  14. Diseases/Disorders Obsessive Compulsive Disorder OCD Anxiety disorder that is characterized by recurring thoughts and repetitive behaviors Examples include: Counting steps Hand-washing Checking or cleaning repeatedly

  15. Diseases/Disorders Bipolar Disorder Changes in moods, energy, and behavior Also called Manic Depressive Illness Has many symptoms During the “High” stage the person may experience: Excessive talking, reduced need for sleep, inflated self-esteem, etc. During the “low” stage the person may experience Loss of energy, agitation, and repeated thoughts of suicide or death

  16. Diseases/Disorders Epilepsy It is not contagious People suffering from it are not crazy!!!! Greek origin meaning “to seize or posses” Prevents brain from interpreting and processing sensory intake Prevents muscle control

  17. Effects of Drugs & Alcohol Marijuana Low-medium doses cause Relaxation Reduced coordination Reduced blood pressure Sleepiness Disruption in attention An altered sense of time and space High doses cause Hallucinations Delusions Impaired memory Disorientation

  18. Effects of Drugs and Alcohol (ctd.) Alcohol Factors that influence how alcohol will effect your body Age Gender Physical condition Amount of food in your system Other drugs or medicines taken

  19. Effects of Drugs and Alcohol (ctd.) Alcohol In low doses Relaxing effect Reduces tension Impairs judgment Slows reflexes In medium doses Slurred speech Altered emotions Drowsiness

  20. Effects of Drugs and Alcohol (ctd.) Alcohol High doses Vomiting Breathing difficulties Unconsciousness Coma

  21. Effects of Drugs and Alcohol (ctd.) Chocolate There is a chemical in chocolate that behaves like THC (delta-9-tetrahydrocannabinol) found in marijuana Dark chocolate contains more of this chemical (anandamide) than milk chocolate This chemical is already in your brain but breaks down quickly, chocolate makes this chemical break down slower causing us to feel “happy” longer

  22. Hyperlinks http://www.nimh.nih.gov/ http://faculty.washington.edu/

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