QUICK SEARCH:   [advanced] Author: Keyword(s):
Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by SPIRA, M. E. Articles by BERGMANN, F. Search for Related Content PubMed PubMed Citation Articles by SPIRA, M. E. Articles by BERGMANN, F.

Journal of Experimental Biology 50,615-627 (1969)
Published by Company of Biologists 1969

Organization of the Giant Axons of the Cockroach Periplaneta Americana

M. E. SPIRA ¹, I. PARNAS ¹, and F. BERGMANN ²

¹ Department of Zoology, the Hebrew University--Hadassah Medical School, Jerusalem
² Department of Pharmacology, the Hebrew University--Hadassah Medical School, Jerusalem

1. Stimulation of the connectives between the suboesophageal and prothoracic ganglia of the American cockroach induced ipsilateral descending spikes in the abdominal giant axons with an average delay of 0·6 msec, per thoracic ganglion.

2. Nicotine at 5 µg./ml. had no effect on conduction in the abdomen but blocked ascending responses sequentially at the 6th abdominal ganglion then at the levels of T₁; T₂, and T₃.

3. Simultaneous descending and ascending impulses resulted in mutual extinction along the nerve cord with the point of collision depending on the interval between stimuli.

4. It is suggested that a common pathway subserves ascending and descending giant impulses and models for bi-directional conduction are discussed.

This article has been cited by other articles:

				J. A. Burdohan and C. M. Comer Cellular Organization of an Antennal Mechanosensory Pathway in the Cockroach, Periplaneta americana J. Neurosci., September 15, 1996; 16(18): 5830 - 5843. [Abstract] [Full Text] [PDF]

				H Meiri, M. Spira, and I Parnas Membrane conductance and action potential of a regenerating axonal tip Science, February 13, 1981; 211(4483): 709 - 712. [Abstract] [PDF]