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14 полученные результаты
Serial-section atlas of the Tritonia pedal ganglion.
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The pedal ganglion of the nudibranch gastropod Tritonia diomedea has been the focus of neurophysiological studies for more than 50 yr. These investigations have examined the neural basis of behaviors as diverse as swimming, crawling, reflex withdrawals, orientation to water flow, orientation to the
Serotonergic, sensory modifications in the apical ganglion during development to metamorphic competence in larvae of the dendronotid nudibranchs Melibe leonina and Tritonia diomedea.
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The following investigation examines changes in the distance between the right and left dendritic termini arising from the serotonergic sensory neurons found in the apical ganglion of the larval dendronotid nudibranchs, Melibe leonina and Tritonia diomedea. A significant increase in separation, that
Characterization of the synaptic actions of an interneuron in the central nervous system of Tritonia.
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The motor program that drives the swimming behavior of the marine mollusk Tritonia diomedea is generated by three interneuronal populations in the cerebral ganglia. One of these populations, the pair of C2 neurons, is shown to also exert powerful synaptic actions upon most cells in the contralateral
Physiological basis of feeding behavior in Tritonia diomedea. III. Role of depolarizing afterpotentials.
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The nature and role of the depolarizing afterpotentials (DAPs) of buccal motoneurons of Tritonia diomedea were examined. Neuron B5 exhibits a DAP whose ionic dependence and modifiability by TEA and 4-AP suggest a similarity to the DAP previously described in pleural pacemaker neurons. Reduction of
Multiple transmitter neurons in Tritonia. II. Control of gut motility.
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Two large multiple transmitter neurons are located in each buccal ganglion of Tritonia. One of these neurons (B11) contains large quantities of two neuropeptides and acetylcholine (ACh), whereas the other neuron (B12) appears to contain the same two peptides but no ACh. One of the peptides present
Immunological localization of Tritonia peptide in the central and peripheral nervous system of the terrestrial snail Helix aspersa.
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We report here evidence that the pedal peptides (Peps) first discovered in mollusks may be neurotransmitters with a general role in control of molluscan somatic and visceral muscles. Using Tritonia peptide (TPep) antiserum we obtained morphological evidence for such a role in Helix aspersa. We
Morphology of two pairs of identified peptidergic neurons in the buccal ganglia of the mollusc Tritonia diomedea.
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The morphology of two pairs of identified peptidergic neurons (B11 and B12) located in the buccal ganglia of Tritonia diomedea was described. Both pairs of neurons contained a large quantity of a small cardioactive peptide (SCP) in their somata. One of the pairs (B11), the large dorsal white cells,
Sources of magnetic sensory input to identified neurons active during crawling in the marine mollusc Tritonia diomedea.
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Although the nudibranch mollusc Tritonia diomedea orients to the geomagnetic field, the anatomical site and the mechanism of the geomagnetic transducer are not known. Previous work on semi-intact preparations of Tritonia diomedea in which the brain is intact and nerve connections to the periphery
Neuropeptide TPep action on salivary duct ciliary beating rate in the nudibranch mollusc Tritonia diomedea.
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Recently, in the marine mollusc Tritonia, a family of three peptides (TPep-NLS, -PLS, -PAR) from identified pedal ganglion neurons has been characterized and shown to regulate ciliary beat frequency in epithelia and isolated cells of the molluscan foot. In this study, using an antiserum raised
A simple neuronal system characterized by a monoclonal antibody to SCP neuropeptides in embryos and larvae of Tritonia diomedea (Gastropoda, Nudibranchia).
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SCP-like antigenicity is first present in Tritonia diomedea in small cells of the cerebral ganglia and a single axon crossing the cerebral commissure of 8-day-old embryos. Other axons and neurons become antigenic as the larva develops. At 4-9 days after larvae hatch from the egg mass, 2 additional
Serotonin immunoreactivity in the central nervous system of the marine molluscs Pleurobranchaea californica and Tritonia diomedea.
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The central nervous systems of the marine molluscs Pleurobranchaea californica (Opisthobranchia: Notaspidea) and Tritonia diomedea (Opisthobranchia: Nudibranchia) were examined for serotonin-immunoreactive (5-HT-IR) neurons and processes. Bilaterally paired clusters of 5-HT-IR neuron somata were
Physiological basis of feeding behavior in Tritonia diomedea. II. Neuronal mechanisms.
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1. The nudibranch mollusk Tritonia diomedea feeds by biting and drawing pieces of coelenterate sea whips into its buccal cavity. It then swallows them in a series of cyclic ingestion movements. The coordinated pattern of swallowing can be elicited in reduced preparations by stimulation of
Multiple transmitter neurons in Tritonia. III. Modulation of central pattern generator controlling feeding.
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Feeding behavior in the gastropod mollusc Tritonia diomedea is controlled by a central pattern generator (CPG) in the buccal ganglia. The medially located, large dorsal white cells (B11) have been shown to contain two small cardioactive peptides (SCPs). A smaller nearby neuron (B12) also appears to
Immunocytochemical localization of pedal peptide in the central nervous system of the gastropod mollusc Tritonia diomedea.
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Tritonia pedal ganglion peptides (TPeps) are a trio of pentadecapeptides isolated from the brain of the nudibranch Tritonia diomedea. TPeps have been shown both to increase the beating rate of ciliated cells of Tritonia and to accelerate heart contractions in the mollusc Clione limacina. Here we
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