Standardized README to Markdown format

README.md

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+# For the paper:
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+Sturzl W, Kempter R, van Hemmen JL (2000) Theory of arachnid prey localization. *Phys Rev Lett* 84:5668-71
+
+## Abstract:
+
+Sand scorpions and many other arachnids locate their prey through highly sensitive slit sensilla at the tips (tarsi) of their eight legs. This sensor array responds to vibrations with stimulus-locked action potentials encoding the target direction. We present a neuronal model to account for stimulus angle determination using a population of second-order neurons, each receiving excitatory input from one tarsus and inhibition from a triad opposite to it. The input opens a time window whose width determines a neuron's firing probability. Stochastic optimization is realized through tuning the balance between excitation and inhibition. The agreement with experiments on the sand scorpion is excellent.
+
+Brian simulator models are available at this web page:
+
+[http://briansimulator.org/docs/examples-frompapers_Sturzl_et_al_2000.html](http://briansimulator.org/docs/examples-frompapers_Sturzl_et_al_2000.html)
+
+Note that the poisson input in the paper was replaced by integrate and fire neurons. The simulation generates an image of eight neurons spike activity from a prey at 144 degrees (see phi assignment on line 8 in Brian program at above link):
+
+![screenshot](./screenshot.png)
+
+This simulation requires Brian which can be downloaded and installed from the instructions available at [http://www.briansimulator.org/](http://www.briansimulator.org/)
+
+For support on installing and using Brian simulations there is a support group at [https://groups.google.com/group/briansupport](https://groups.google.com/group/briansupport).
+
+---
+
+2025-07-09: Converted README to Markdown.