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In another paper two types of cortical activity elicited by stimulation of the sensory path have been described. Evidence was presented that these phenomena, the so-called augmented and repetitive sensory responses, share a single neuronal mechanism, but may, on the other hand, be segregated both from the simple "primary" sensory response and the generalized 8 to 12 per second "spontaneous" bursts (Dempsey and Morison, 1943). The present study was directed toward a more thorough investigation of the properties of the system responsible for the augmented and repeating effects. METHODS. The methods employed were entirely similar to those employed in the preceding papers and need not be repeated. RESULTS.

The APS Journal Legacy Content is the corpus of 100 years of historical scientific research from the American Physiological Society research journals. This package goes back to the first issue of each of the APS journals including the American Journal of Physiology, first published in 1898. The full text scanned images of the printed pages are easily searchable. Downloads quickly in PDF format.