The brain - PowerPoint PPT Presentation

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The brain

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  1. The brain Chapter 3

  2. Alzheimer’s disease • Fatal disease of the hippocampus identified by forgetting, repeating, confusion, and memory loss; also changes to personality and emotion. • “The Rock of Gibraltar” • ALZ.org

  3. Human brain • Genes – chemical chains of instruction for human development • Fueled by glucose • Made up of Glial cells and neurons • Glial cells – star-shaped cell that supports growth of and protects neurons • Insulates from outside electrical impulses • Release chemicals for neurons • Neurons – receive and send electrical signals • Limited capacity for regrowth or repair after adulthood • Mind-body question

  4. Nervous system Neurons Nerves Peripheral – located throughout body, made up of nerves Capable of regrowing Central – neurons located in the brain and spinal cord Limited ability to repair • Cell body • Dendrite • Axon • Myelin sheath • Ends bulbs • Synapse

  5. Sending information • Sensors pick up information • Axon chemical releases • Ion fluid charges • Resting state • Action potential • Nerve impulse • End bulb and neurotransmitters

  6. transmitters • Excitatory or Inhibitory • Neurotransmitters • dozen chemicals that travel synapse from end bulb to receptors • Transmitters • GABA and alcohol • Endorphin and morphine • Anandamide and THC • Nitric oxide and emotions

  7. reflex • Sensors • Afferent neurons • Carry info from senses to spinal cord • Interneuron • Connections between neurons • Efferent neurons • Motor • Carry info away from spinal cord • Produce responses in muscles and organs

  8. application • Research on phantom limb • Plants and drugs in other cultures • Parkinson’s Disease • Fetal tissue transplant • Head transplant