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Journal of Experimental Biology 54,587-597 (1971)
Published by Company of Biologists 1971

Rhythmic Activity in the Insect Nervous System : I. Ventilatory Coupling of a Mantid Spiracle

P. L. MILLER 1

1 Department of Zoology Oxford

1. Spiracle 1 of Sphodromantis lineola possesses a moveable valve equipped with two closer muscles which act as synergists, receive identical innervation but act on different regions of the valve.

2. The two muscles are controlled by two motor axons which produce simultaneous small EPSPs in the two muscles of the left and right spiracles.

3. Valve activity can be facultatively coupled to the abdominal ventilator} rhythm. Three patterns of coupling have been recognized.

4. Ventilation-coupled activity includes burst formation. Similar repetitive bursts can be produced in the spiracle nerves of an isolated segment by treatment with CO2 and by mechanical stimulation.

Submitted on October 19, 1970






© The Company of Biologists Ltd 1971