Summation and Inhibition Following Contralateral Stimulation of the Tarsal Chemoreceptors of the Blowfly

Dethier, V. G.

doi:10.2307/1538641

Cited by 17 publications

(2 citation statements)

References 14 publications

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“…Otherwise one would have to attribute to DDT simultaneous stabilizing and unstabilizing actions on the same cell in order that the rejection threshold remain unchanged. This confirms Dethier's (1953) conclusion that there must be at least two varieties of chemoreceptors on fly tarsi.…”

Section: Hopkinssupporting

confidence: 87%

“…Among the many receptors on the tarsi of flies several types responding to different modalities of stimulation control the feeding response. These include at least two types of contact chemoreceptor (see also Dethier, 1953), activated by acceptable and unacceptable compounds, releasing or inhibiting the feeding reflex and orientation to food. Under conditions of near-starvation a suitable pattern of tactile stimulation can release feeding behavior.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Chemoreception in Insects and the Action of DDT

Smyth¹,

Roys²

1955

The Biological Bulletin

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Section: Hopkinssupporting

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Chemoreception in Insects and the Action of DDT

Smyth¹,

Roys²

1955

The Biological Bulletin

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Behavioral studies of inhibition and integration in the mosquito Culiseta inornata (Williston)

Owen¹

1967

J. Exp. Zool.

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A study was made of the interaction in the central nervous system of sensory input arising from the simultaneous application of opposing stimuli to receptors on the tarsi and labella of the mosquito. Stimulating chemosensory hairs on the tarsi with 5 M NaCl failed to inhibit the labellar response to sucrose at concentrations above 0.125 M. At lower sucrose concentrations there was a decrease in the number of mosquitoes responding. The application of 5 M NaCl to the tarsal receptors elevated the labellar threshold for sucrose in all subjects tested. This influence of the salt was expressed whether acting on the tarsi in an ipsilateral or contralateral manner. Stimulating the tarsal hairs with 2 M sucrose resulted in a labellar response to NaCl at concentrations of 0.50 M and lower. Ordinarily NaCl is rejected at all concentrations by this mosquito. Evidence was obtained which indicated that the labellar response to NaCl was mediated by the water receptor rather than by the salt receptor.The presence of contact chemoreceptor organs on the tarsi and labella of the mosquito provides a convenient means of investigating central nervous system inhibition and integration. Under appropriate circumstances, stimulation of chemosensory hairs on the tarsi with sucrose elicits the proboscis response and, likewise, the same stimulus applied to the labellar hairs evokes the labellar response (Frings and Hamrum, '50; Feir et al., '61). In contrast with these results, the application of NaCl to groups of chemosensory hairs on either of these organs will not elicit a feeding response (Owen, unpublished). At high concentrations NaCl acts as a strong rejection stimulus and, conversely, sucrose is highly stimulating as an acceptable material. The interaction in the central nervous system of sensory input arising from simultaneous application of these two opposing stimuli to sensory hairs on the tarsi and labella was the basis of this study.Much that is known about inhibition in insects has been learned from studies of the taste receptors of the blowfly, P h m i a regina. Dethier ('53) reported that NaCl, HCI and propanol could act either ipsilaterally or contralaterally in preventing the proboscis response to sucrose. He also demonstrated that the prevention of proboscis extension to both water and sucrose by unacceptable compounds was predom-J. EXP. ZOOL., 166: 301306.inantly a central nervous system phenomenon. It was also noted by Dethier ('55) that when unacceptable compounds were mixed with sucrose and applied to the tarsi of the blowfly the rejection thresholds increased as the sugar concentration was increased. Arab ('59) found that brief stimulation of a few chemosensory tarsal hairs of the blowfly with 2 M NaCl resulted in an immediate rise in the threshold of the labellar hairs for sucrose. Furthermore, he noted that the central excitatory state of a hungry fly could be raised by brief stimulation of its tarsi with 1 M sucrose. Dethier et al. ('66) demonstrated that for a hungry fly which is water satiated, stimul...

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The sensory control of motor output in fly proboscis extension

Getting

1971

Z. Vergl. Physiol.

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Summation and Inhibition Following Contralateral Stimulation of the Tarsal Chemoreceptors of the Blowfly

Cited by 17 publications

References 14 publications

Chemoreception in Insects and the Action of DDT

Chemoreception in Insects and the Action of DDT

Behavioral studies of inhibition and integration in the mosquito Culiseta inornata (Williston)

The sensory control of motor output in fly proboscis extension

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