ABSTRACT
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.
The two muscles are controlled by two motor axons which produce simultaneous small EPSPs in the two muscles of the left and right spiracles.
Valve activity can be facultatively coupled to the abdominal ventilatory rhythm. Three patterns of coupling have been recognized.
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.
Copyright © 1971 The Company of Biologists Ltd.
1971
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