Animals

Sensory Physiology of Aquatic Lower Vertebrates. Satellite by T. Szabó, G. Czéh

By T. Szabó, G. Czéh

Advances in Physiological Sciences, quantity 31: Sensory body structure of Aquatic reduce Vertebrates covers the complaints of the symposia of the twenty eighth overseas Congress of body structure. The ebook provides 17 papers that element strengthen findings within the sensory body structure of aquatic decrease vertebrates.
The insurance of the textual content contains electroreceptors in Indian catfish teleosts; electroreceptive microampulla within the African mudfish Clarias lazera; and species specificity of electrical organ discharges in a sympatric crew of gymnotoid fish from Manaus. The e-book additionally offers comparative reviews, similar to the intercourse adjustments within the electrical organ discharge of Eigenmannia virescens and the impact of gonadal maturation; and behavioral experiences, similar to social habit in mormyrid fish.
The booklet may be of serious curiosity to marine biologists, ethologists, and zoologists.

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Sensory Physiology of Aquatic Lower Vertebrates. Satellite Symposium of the 28th International Congress of Physiological Sciences, Keszthely, Hungary, 1980

Advances in Physiological Sciences, quantity 31: Sensory body structure of Aquatic reduce Vertebrates covers the complaints of the symposia of the twenty eighth foreign Congress of body structure. The ebook offers 17 papers that element improve findings within the sensory body structure of aquatic reduce vertebrates. The insurance of the textual content comprises electroreceptors in Indian catfish teleosts; electroreceptive microampulla within the African mudfish Clarias lazera; and species specificity of electrical organ discharges in a sympatric team of gymnotoid fish from Manaus.

Additional info for Sensory Physiology of Aquatic Lower Vertebrates. Satellite Symposium of the 28th International Congress of Physiological Sciences, Keszthely, Hungary, 1980

Example text

Simultaneous external (P) and intracellular (N) recordings from the afferent. Note that the intracellular records show large PSP's and superimposing spike train. ) stimulation, respectively. Dotted lines in V, P and N traces indicate their resting levels. The lowermost line is drawn at the maximally repolarized level (max. ) in B. Fig. 5 was reconstructed from the data in the previous reports (Obara, 1974, 1976). The Plotosus receptors in situ exhibit a peculiar non- linearity. When hyperpolarized or depolarized beyond some + 5 mV, their I-V relation is quite linear in both quadrants, with an indication of the regeneratevely depolarizing response.

Stimuli were always given well after the neural frequency output (F) had returned to its control level following preceding stimuli. Hence, stimulus interval varied from every 2 sec to a few ten seconds. Variations of this basic experimental set-up for selective postsynaptic stimulation will be treated briefly in the Discussion. RESULTS Because of sensory adaptation the input-output property of any sensory receptor depends on stimulus duration. In terms of the afferent impulse frequency output, the Plotosus receptors show a complete adaptation in some ten seconds.

Terzuolo and Washizu, 1962). The PSP output, however, may be offset to a certain extent, since the afferent terminal must be depolarized to a finite "firing threshold" before triggering an afferent impulse (Obara, 1976). Simultaneous extracellular recordings of the PSP (P) and frequency (F) outputs were undertaken to resolve their relation. The input-output property in terms of the P outputs should also provide a measure which is directly comparable with the synaptic transfer in other neuronal synapses.

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