Tag Archives: frog
From gun to nerve
In Of frogs and men: the origins of psychophysiological time experiments, 1850–1865, Henning Schmidgen retraces the history of Helmholtz’s experiments on the propagation of stimuli within nerves. The first apparatus designed by Helmholtz repurposes a mechanism of the physicist Claude Pouillet in the field of ballistic, to measure the velocity of a bullet at different […]
A system for detecting an accessible bug
We have described each of the operations on the retinal image in terms of what common factors in a large variety of stimuli cause response and what common factors have no effect. What, then, does a particular fiber in the optic nerve measure? We have considered it to be how much there is in a […]