In Defense of Teleology

  • Ragnar Granit

Abstract

The bad reputation teleological thinking enjoys in many circles may perhaps be traceable to its metaphysical history. As a young man with some interest in philosophy I was taught that there are two metaphysical variants of teleology, the transcendental form which saw in it a divine law, and the immanent form which regarded purposiveness as one of Nature’s inherent principles of design. I daresay that many scientists would have been willing to accept immanent teleology on its merits had it not been for the fact that it failed to provide a causal explanation and thus had no predictive value. The current scientific explanation is based on a causal relation between events A and B of such a nature that, knowing A one can predict that B will occur.

Keywords

Retina Clarification Nexion 

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References

  1. Denny-Brown, D. (Ed.): Selected Writings of Sir Charles Sherrington. London: Hamish Hamilton Medical Books 1939.Google Scholar
  2. Eccles, J.C., Eccles, R.M., Iggo, A., Ito, M.: Distribution of recurrent inhibition among motoneurones. J. Physiol. 159, 479–499 (1961).PubMedGoogle Scholar
  3. Lundberg, A.: The convergence of monosynaptic excitatory afferents onto many different species of alpha motoneurones. J. Physiol. 137, 22–50 (1957).PubMedGoogle Scholar
  4. — Action potentials of alpha motoneurones supplying fast and slow muscles. J. Physiol. 142, 275–291 (1958).PubMedGoogle Scholar
  5. Fatt, P., Koketsu, K.: Cholinergic and inhibitory synapses in a pathway from motor-axon collaterals to motoneurones. J. Physiol. 126, 524–562 (1954).PubMedGoogle Scholar
  6. Fechner, G.T.: Elemente der Psychophysik. Leipzig: Breitkopf & Härtel 1862.Google Scholar
  7. Granit, R.: Charles Scott Sherrington. An appraisal. London: Nelson Publ. 1966.Google Scholar
  8. Henatsch, H.-D., Steg, G.: Tonic and phasic ventral horn cells differentiated by post-tetanic potentiation in cat extensors. Acta physiol. scand. 37, 114–126 (1956).PubMedCrossRefGoogle Scholar
  9. Pascoe, J.E., Steg, G.: The behaviour of tonic α and β motoneurones during stimulation of recurrent collaterals. J. Physiol. 138, 381–400 (1957).PubMedGoogle Scholar
  10. Renkin, B.: Net depolarization and discharge rate of motoneurones, as measured by recurrent inhibition. J. Physiol. 158, 461–475 (1961).PubMedGoogle Scholar
  11. Kernell, D.: The limits of firing frequency in cat lumbosacral motoneurones possessing different time course of afterhyperpolarization. Acta physiol. scand. 65, 87–100 (1965).CrossRefGoogle Scholar
  12. — Input resistance, electrical excitability, and size of ventral horn cells in the cat spinal cord. Science 152, 1637–1640 (1966).PubMedCrossRefGoogle Scholar
  13. Phillips, C.G.: Actions of antichromic pyramidal volleys on single Betz cells in the cat. Quart. J. exp. Physiol. 44, 1–25 (1959).PubMedGoogle Scholar
  14. Renshaw, B.: Influence of the discharge of motoneurons upon excitation of neighboring motoneurons. J. Neurophysiol. 4, 167–183 (1941).Google Scholar
  15. — Central effects of centripetal impulses in axons of spinal ventral roots. J. Neurophysiol. 9, 191–204 (1946).PubMedGoogle Scholar
  16. Schultze, M.: Die Retina. In: Strickers Handb. d. Lehre von den Geweben 2, 977-1034Google Scholar
  17. Sherrington, C.S.: The Integrative Action of the Nervous System. Silliman Lectures. New Haven: Yale University Press 1906.Google Scholar

Copyright information

© Springer-Verlag Berlin · Heidelberg 1972

Authors and Affiliations

  • Ragnar Granit
    • 1
  1. 1.Karolinska InstitutetThe Nobel Institute for NeurophysiologyStockholm 60Sweden

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