On the firing patterns of the “movement” receptors of the elastic organs of the crab, carcinus

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Abstract

  • 1.

    1. The firing pattern of the nerve impulses of opener and closer movement fibers of the propo-dactylopodite joint of the walking legs of the crab, Carcinus maenas L., were studied during induced motions.

  • 2.

    2. Original results, indicating a skip-type discharge rate at speeds of movement below saturation levels, were confirmed by computer analysis of spike intervals. Longer intervals were found to be multiples of the one at saturation.

  • 3.

    3. Factors which appear involved in changes of the interval at saturation firing are discussed.

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Present address: Division of Biology, California Institute of Technology, Pasadena, Calif. 91109, U.S.A.

Present address: Istituto di Biologia Generale, Università di Pisa, 56100 Pisa, Italy.

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