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Nerve signal processing

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Nerve signal processing

  1. 1. Nerve Signal Processing <br />
  2. 2. Discovery of Neuron Doctrine<br />Ramony Cajal and Camillo Golgi 1906 Noble<br />
  3. 3. Nerve Cell<br />
  4. 4. Types of neurons<br />
  5. 5. Types of Neurons<br />
  6. 6. Bioelectricity<br />(1737-1798)<br />
  7. 7. Giant Nerve Cells of Squid<br />
  8. 8. Ion distribution across cell membrane<br />Effect of concentration difference <br />Electrical potential difference affecting negative ions<br />Pressure difference<br />
  9. 9. Transport of solutes across the Neuronal membrane<br />
  10. 10. Ion movement across cell <br />
  11. 11. Resting membrane Potential<br />
  12. 12. Action Potential<br />
  13. 13. Propagation of AP<br />
  14. 14. Saltatory conduction<br />
  15. 15. The Refractory Period<br />
  16. 16. Synapse<br />
  17. 17. Electrical synapse<br />
  18. 18. Chemical Synapse<br />
  19. 19. Chemical Synapse at Neuromuscular Junction<br />
  20. 20. Neurotransmitter release<br />
  21. 21. Post synaptic receptor<br />
  22. 22. Excitatory and Inhibitory Post Synaptic Potential<br />
  23. 23. Excitatory and Inhibitory signals<br />Excitatory and inhibitory currents have competitive effects in a single nerve cell. (Adapted from Eckert et al., 1988.)<br />
  24. 24. Inhibition<br />
  25. 25. Stretch Reflex<br />
  26. 26. Organization of Neurons for Relaying Signals<br />
  27. 27. Convergence and Divergence<br />
  28. 28.
  29. 29. Reverberatory (Oscillatory) Circuit as a Cause of Signal Prolongation.<br />
  30. 30. Neurotransmitters <br />The substance must be present within the presynaptic neuron<br />The substance must be released in response to presynaptic depolarization, and the release must be Ca2+-dependent.<br />Specific receptors for the substance must be present on the postsynaptic cell<br />
  31. 31. Major classes of NT<br />
  32. 32. Acetyl Choline<br />
  33. 33. Cholinergic Receptors in Normal Brain<br />
  34. 34. Serotonin System<br />
  35. 35. Dopamine System<br />
  36. 36. Norepinephric System<br />
  37. 37.
  38. 38. Glutamate System <br />
  39. 39. GABA System<br /><ul><li>Widespread in the brain and spinal cord
  40. 40. Inhibitory by increasing permeability to Cl</li></li></ul><li>Second Messenger <br />
  41. 41. Thanks<br />

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