Thermal Sensitivity of Lateral Inhibition in Limulus Eye
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چکیده
منابع مشابه
Thermal Sensitivity of Lateral Inhibition in Limulus Eye
The effectiveness of lateral inhibition, measured as spike response decrement in a test ommatidium, produced by activity in a group of neighboring ommatidia, decreases as temperature decreases (Q(10) of 2.6). The corresponding sensory transducer-spike encoding processes have a weaker temperature dependence (Q(10) of 1.6). Relative synaptic delay, the time difference between the latency of inhib...
متن کاملSerotonin and Inhibition in Limulus Lateral Eye
The response to light of one ommatidium is reduced or suppressed by simultaneous illumination of neighboring ommatidia. The mechanism of this lateral inhibition may be chemical synaptic transmission, based on the physiological findings of a number of investigators and on the following evidence. The fine structure of the neuropil of the lateral plexus exhibits numerous clear vesicles (ca. 400 A)...
متن کاملPutative synaptic mechanisms of inhibition in Limulus lateral eye
Serotonin (5-HT) perfusion of a thin section of Limulus lateral eye hyperpolarizes retinular and eccentric cell membrane potential, and blocks spike action potentials fired by the eccenteric cell. The indoleamine does not directly affect retinular cell receptor potential or eccenteric cell generator potential in response to light stimuli. LSD perfusion blocks both this inhibitory action of 5-HT...
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The receptor specificity for synaptically mediated lateral inhibition in Limulus lateral eye retina was studied by structure-activity correlations of the action of the putative indoleaminergic neurotransmitter, serotonin (5-HT), and its isomers and structural analogs, tryptamine (TRYP), 6-hydroxytryptamine (6HT), 5,6-dihydroxytryptamine (5,6-DHT), 5-hydroxydimethyltryptamine (5-HDMT), and 5-hyd...
متن کاملInhibition in the Limulus lateral eye in situ
Inhibition in the Limulus lateral eye in situ is qualitatively similar to that in the excised eye. In both preparations ommatidia mutually inhibit one another, and the magnitude of the inhibitory effects are linear functions of the response rate of individual ommatidia. The strength of inhibition exerted between single ommatidia is also about the same for both preparations; however, stronger ef...
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ژورنال
عنوان ژورنال: Journal of General Physiology
سال: 1973
ISSN: 1540-7748,0022-1295
DOI: 10.1085/jgp.62.4.392