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Journal of Experimental Biology 40,775-780 (1963)
Published by Company of Biologists 1963

Studies on Crop Function in the Cockroach (Periplaneta Americana L.) : II. THE NERVOUS CONTROL OF CROP-EMPTYING

K. G. DAVEY ¹ and J. E. TREHERNE ²

¹ Department of Zoology, University of Cambridge; Institute of Parasitology, McGill University, Macdonald College, P.Q., Canada
² Department of Zoology, University of Cambridge

1. The nervous pathway involved in the control of crop-emptying has been worked out by the method of nerve section.

2. This pathway involves nerve 5 from the pharynx to the frontal ganglion, the recurrent nerve, the oesophageal nerve and ganglion, the ingluvial nerve and ganglion.

3. Function is not abolished by nerve section between the brain and the frontal ganglion.

4. The sensory end of the pathway is in the pharynx where there is a sense organ which, it is suggested, is an osmoreceptor. A preliminary account of its structure is given.

Note:

>A.R.C. Unit of Insect Physiology.