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AMATH 882 Part II: Neurons

AMATH 882 Part II: Neurons. The Nervous System. Brain + spinal chord + periphery nerves Controls interaction with environment - senses Regulation of basic functions – breathing etc Thinking and memory. The Brain. 1.4 kg of nervous tissue 10^11 neurons

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AMATH 882 Part II: Neurons

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  1. AMATH 882Part II: Neurons

  2. The Nervous System • Brain + spinal chord + periphery nerves • Controls interaction with environment - senses • Regulation of basic functions – breathing etc • Thinking and memory

  3. The Brain • 1.4 kg of nervous tissue • 10^11 neurons • 10-50 times more glial (support) cells

  4. The Brain • Composed of regions specialized to perform certain tasks

  5. Brain Regions • Regions consist of subregions composed of specialized cells www.neuroscience.bham.uk/ humanflowerproject.com/images/uploads/hippocampus-last.jpg

  6. Occur at all levels: Between components of nervous system Between/within brain regions Between/within subregions Fundamental unit at lowest level is neuron Neural Networks

  7. Neurons – different morphology www.icmb.utexas.edu www.wellcome.ac.uk

  8. ... but same basic structure www.greenfacts.org/glossary/images/neuron.gif

  9. Neurons – different behaviour

  10. Action potential = basic unit of electrical activity = spike in voltage across cell membrane ... but same biophysics

  11. Electrical Activity – Ion Channels campus.lakeforest.edu/~light/ion%20channel.jpg users.rcn.com/jkimball.ma.ultrnet/Biology/Pages/E/ExcitableCells.html

  12. Experimental Data + soma.npa.uiuc.edu/courses/physl341/Lec3.hml

  13. + Electric Circuit Theory = www.en.wikipedia.org/wiki/Hodgkin-Huxley_model

  14. = DE Model for Neural Cell http://www.amath.washington.edu/~qian/talks/talk5

  15. Other Models

  16. Neural Communication - Synapses

  17. Neural Communication – Gap Junctions

  18. Neural Computation http://www.dna.caltech.edu/courses/cns187/

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