Simultaneous stimulus and neuron solutions in multidimensional scaling spaces

Abstract
Multidimensional scaling (MDS) has proven very powerful for the display of the relationships between stimuli, and between neurons, in the chemical senses. One problematic aspect of this technique is that it is incapable of displaying both stimuli and neurons in the same space, as is typical and useful in the other senses where the stimulus parameters are known. What is lacking for an MDS solution containing both neurons and stimuli is a measure of the distance between a given neuron and a given stimulus. In the technique described herein, this distance is taken to be a function of the difference between a neuron's maximal response and the response evoked by a given stimulus. By combining all three classes of differences (between stimuli, between neurons and between neurons and stimuli) into one matrix, we were able to obtain reasonable MDS solutions containing both stimuli and neurons.

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