Feeding in<i>Helisoma trivolvis</i>: The Morphological and Physiological Bases of a Fixed Action Pattern
American ZoologistPublished 1 August 1974Open access
Stanley B. Kater
Citations214
Generate an AI Snapshot to get a quick, structured summary of this paper.
Study Snapshot
ObjectiveStudy objective
MethodsResearch methodology
PopulationPopulation studied
Sample sizeSample sizes
OutcomesStudy outcomes here
ResultsStudy results comes here
LimitationsResearch study limitations comes here
A concise AI-generated summary of the paper will appear here once you click Generate AI Snapshot.
TL;DR
This report emphasizes the analysis of the centrally programmed components of the feeding output by characterizing interactions among three classes of neurons in the buccal ganglia: protractor motoneurons, retractor motoneURons, and the neurons of an electrically coupled neural network which produces both the timing and driving of motoneuron activity.
Abstract
This report is a description of feeding in the pulmonate snail, Helisoma trivolvis and provides a detailed account of: (i) the behavior, (ii) the muscular system, (iii) the muscle activity patterns, (iv) the neuromusculai relationships, (v) the motoneurons to specific muscles, and finally, (vi) an introduction to the premotor system. Feeding is the result of the integration of sensory information onto components of a central program which is delived from connections within the buccal ganglia. This report emphasizes the analysis of the centrally programmed components of the feeding output by characterizing interactions among three classes of neurons (approximately 50 cells) in the buccal ganglia: protractor motoneurons, retractor motoneurons, and the neurons of an electrically coupled neural network which produces both the timing and driving of motoneuron activity.
Keywords
Neuroscience
The Journal of PhysiologyIonic mechanism of a two‐component cholinergic inhibition in <i>Aplysia</i> neurones
222 Citations1972Jacsue Kehoe
The ionic mechanisms of the two components of the inhibitory response (whether elicited synaptically or by ACh injection) are analysed and shown to be mediated by a distinct cholinergic receptor.
ScienceBilateral Symmetry and Interneuronal Organization in the Buccal Ganglia of <i>Aplysia</i>
205 Citations1971Daniel Gardner
Principles of functional organization of the bilaterally symmetric buccal ganglia of Aplysia were studied and apparent redundancy of interneuronal action leads to feed-forward summation, eliciting amplified synaptic output from each interneuron pair.
ScienceOscillator Neurons in Crustacean Ganglia
194 Citations1971Martin Mendelson
The motor rhythm of ventilation in hermit crabs and lobsters appears to be controlled by a pair of neurons, one in each half of the subesophageal ganglion, and the fact that higher order interneurons can control the rate of the oscillator by means of a smoothly graded input lends support to the idea that oscillator neurons respond periodically to a constant ionic stimulus.
Journal of Experimental BiologyNervous Mechanisms Underlying Intersegmental Co-Ordination of Leg Movements During Walking in the Cockroach
178 Citations1973K. G. Pearson, J. F. Iles
It is proposed that two mechanisms are important in co-ordinating leg movements in a slow walking cockroach: mutual inhibition between levator burst-generating systems in adjacent ipsilateral legs, and an inhibitory reflex pathway from the campaniform sensilla of the trochanter to the burst-Generating system of each leg.
The Journal of Cell BiologyEXPERIMENTAL ALTERATION OF COUPLING RESISTANCE AT AN ELECTROTONIC SYNAPSE
118 Citations1971Yujiro Asada, Michael V. L. Bennett
Mechanical injury to an axon increased coupling resistance, and no recovery of coupling resistance was observed, although the resting potential and resistance of the injured axon could return to near normal levels.
Biological BulletinOBSERVATIONS ON THE FUNCTIONING OF THE ALIMENTARY SYSTEM OF THE SNAIL LYMNAEA STAGNALIS APPRESSA SAY
112 Citations1946Melbourne R. Carriker
A balanced physiological salt solution was developed which maintains contractions of the vas deferens for approximately 66 hours and cathepsin was found in greatest concentration in the liver and no activity could be ascertained in the gut fluids.
Journal of Experimental BiologyA System of Electrically Coupled Small Cells in the Buccal Ganglia of the Pond Snail <i>Planorbis Corneus</i>
96 Citations1972Michael S. Berry
In some preparations spontaneous bursting occurred in trigger cells and this elicited burst activity in large neurones, including motoneurones, in the buccal ganglia of Planorbis, which may have an intrinsic pacemaker.
The Journal of General PhysiologyElectrical Transmission among Neurons in the Buccal Ganglion of a Mollusc, <i>Navanax inermis </i>
88 Citations1970Herbert Levitan, L Tauc +1 more
The opisthobranch mollusc, Navanax, is carnivorous and cannibalistic, and electrical coupling among the 10 cells plays a minor role in sudden pharyngeal contractions but that the dual electrical-chemical coupling with interneurons may be important in this respect.
American ZoologistNeuromuscular Systems in Molluscs
70 Citations1973C.B. Heyer, Stanley B. Kater +1 more
Some structural and related functional characteristics of molluscan muscle and some characteristics of the widely-studied sustained contraction, known as “catch” are considered.
Permeability and Structure of Electrotonic Junctions and Intercellular Movements of Tracers
56 Citations1973Michael V. L. Bennett
A brief review of the data that led to the concept of the structure of the electrotonic junction or synapse and some effects of histological fixation on junctional properties and the implications for interpretation of tracer measurements are presented.
Journal of Comparative Physiology ANeuromuscular transmission in the gastropod mollusc Helisoma trivolvis: Identification of motoneurons
45 Citations1971Stanley B. Kater, C.B. Heyer +1 more
Intracellular records from three muscles in the gastropod mollusc Helisoma trivolvis are described and correlated with extracellular electromyograms and tension recordings and a single basic pattern of muscle innervation, which was comparable to the vertebrate motor unit, was observed.
Journal of Experimental BiologyThe Input-Output Organization of A Pair of Giant Neurones in the Mollusc, <i>Anisodoris Nobilis</i> (Macfarland)
33 Citations1969A. L. F. Gorman, Maurizio Mirolli
The results show that the G cell functions as a command interneurone for an aggregate of electrically interconnected peripheral neurones in the nudibranch mollusc Anisodoris nobilis.
Netherlands Journal of ZoologyFeeding Responses To Sucrose in the Pond Snail Lymnaea Stagnalis After Nerve Section and Tentacle Amputation
21 Citations1972J. C. Jager, J.T. Goldschmeding
It is tentatively proposed that stimulation of receptors in the lips by sucrose may affect the buccal ganglia via the n.
Journal of Experimental BiologyPatterned Activity of the Buccal Ganglion of the Nudibranch Mollusc <i>Archidoris Pseudoargus</i>
17 Citations1971R. M. Rose
The buccal mass of molluscs has been the subject of many investigations from the point of view of functional morphology, but there have been no electrophysiological interpretations of radula movements, and extracellular recording methods have been used to show that the buCCal ganglion produces a sequence of bursts during radula movement.