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A geometrical factor in the variability of sensations of warmth evoked by radiation

Published online by Cambridge University Press:  24 October 2008

G. H. Weight  and
R. A. Rankin
G. H. Weight
Affiliation:
Department of Anatomy Cambridge
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Extract

It is a commonplace observation in experiments on cutaneous sensation that a constant stimulus, applied under supposedly constant conditions, evokes a varial response. In this paper it will be shown that the variability is in part a geometri consequence of the fact that the sense organ is not a continuum but an aggregati of discrete, sensitive ‘spots’. The total extent of the ‘spots’ for one modality, acti at a given time, is only a small fraction of the area of the site tested; this is illustrat in all of the classical maps, and is particularly true of the warmth-spots (Rein (8)). I purposes of theoretical discussion, the sensory spots may therefore be treated points that form an array or pattern. This pattern is unlikely to be regular and mt indeed, be highly irregular. No assumptions about its regularity are necessary the present argument.

Type
Research Article
Information
Mathematical Proceedings of the Cambridge Philosophical Society , Volume 50 , Issue 3 , July 1954 , pp. 474 - 484
Copyright
Copyright © Cambridge Philosophical Society 1954

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References

REFERENCES

(1)Hardy, G. H.Ramanujan (Cambridge, 1940), pp. 67 and 81.Google Scholar
(2)Hardy, J. D. and Oppel, T. W.Studies in temperature sensation. III. The sensitivity of the body to heat and the spatial summation of the end organ responses. J. din. Invest. 16 (1937), 533–40.Google ScholarPubMed
(3)Herget, C. M., Granath, L. P. and Hardy, J. D.Warmth sense in relation to the area of skin stimulated. Amer. J. Physiol. 135 (1942), 20–26.Google Scholar
(4)Herget, C. M. and Hardy, J. D.Temperature sensation: the spatial summation of heat. Amer. J. Physiol. 135 (1942), 426–9.Google Scholar
(5)Kendall, D. G.On the number of lattice points inside a random oval. Quart. J. Math. 19 (1948), 1–26.CrossRefGoogle Scholar
(6)Kendall, D. G. and Rankest, R. A.On the number of points of a given lattice in a random hypersphere. Quart. J. Math. (2) 4 (1953), 178–89.CrossRefGoogle Scholar
(7)Oppel, T. W. and Hardy, J. D.Studies in temperature sensation. I. A comparison of the sensation produced by infra-red and visible radiation. J. din. Invest. 16 (1937), 517–24.Google Scholar
(8)Rein, H.Ueber die Topographie der Warmempfindung. Z. Biol. 82 (1925), 513–34.Google Scholar
(9)Sinclair, D. C., Weddell, G. and Zander, E.The relationship of cutaneous sensibility to neurohistology in the human pinna. J. Anat., Lond., 86 (1952), 402–11.Google ScholarPubMed