Brain Dynamics: Synchronization and Activity Patterns in by Hermann Haken

By Hermann Haken

This ebook addresses a wide number of versions in mathematical and computational neuroscience. it truly is written for the specialists in addition to for graduate scholars wishing to go into this attention-grabbing box of analysis. the writer experiences the behaviour of enormous neural networks composed of many neurons coupled via spike trains. An research of part locking through sinusoidal couplings resulting in different types of circulation coordination is integrated.

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Additional resources for Brain Dynamics: Synchronization and Activity Patterns in Pulse-Coupled Neural Nets with Delays and Noise

Sample text

Neighbouring columns differ with respect to their orientation specificities by about 10o . Thus going from one side to the other of a column, we find a slight change of orientation from initially vertical to finally horizontal orientation. We may distinguish between columns that are mainly served from the left or from the right eye so that they are called ocular dominance columns. Each small section of the retina thus possesses a corresponding set of columns with all possible directions and for both eyes.

A) Spike train of finite length with constant underground signal (mimicking noise) (schematic); b) (Auto-) Correlogram corresponding to a) that is considerably larger than the delay τ , the number of coincidences is practically constant and the correlogram looks like that of Fig. 15c. An autocorrelogram is obtained if we correlate two timeshifted signals that stem from the same pool. If the signal is composed of regular spikes and the same background (Fig. 16a), the autocorrelogram of Fig. 16b results.

We then obtain our final result − t− 0 − t0 = ξ(t0 ) 1 ˙ φ− (t0 )−1 + φ˙ + (t0 )−1 . 4 Kicks Later in this book, we want to model the conversion of axonal spikes into dendritic currents. At the molecular level, this is quite a complicated process. But as discussed in Chap. 1, we want to study brain functions at and above the level of neurons. What happens in a dendrite before an axonal pulse arrives at a synapse? Clearly, there is no dendritic current; then the pulse generates a current, which finally is damped out.

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