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Universal Neuroanatomy

Universal Neuroanatomy. Universal Neuroanatomy. Universal Neuroanatomy. Universal Neuroanatomy. Universal Neuroanatomy. Universal Neuroanatomy. Density of Connections. How many connections will it take to link a square with every other square of the same size? How big would that square

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Universal Neuroanatomy

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  1. Universal Neuroanatomy

  2. Universal Neuroanatomy

  3. Universal Neuroanatomy

  4. Universal Neuroanatomy

  5. Universal Neuroanatomy

  6. Universal Neuroanatomy

  7. Density of Connections How many connections will it take to link a square with every other square of the same size? How big would that square be in a real brain? Answer: about 2 sq mm. (Valentino Braitenberg)

  8. FM Radio Analogy for Neural Coding Frequency-modulated sine wave Spike at each zero- Crossing Integrate (smooth) the spikes Spike (digtital) Interspike interval (analog)

  9. Codes in Axons I Distributed – relative activity Frequency – over time Phase – signal in 1st 3 spikes only

  10. Codes in Axons II Labelled line – brain ‘knows’ source Temporal microstructure – pattern matters

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