Participation of an Unpaired Motor Neurone in the Bilaterally Organized Oesophageal Rhythm in the Lobsters Jasus Lalandii and Palinurus Vulgaris

1981 ◽  
Vol 90 (1) ◽  
pp. 205-230
Author(s):  
M. MOULINS ◽  
F. NAGY
Keyword(s):  
Cell Body ◽  
Motor Neurone ◽  
The Other ◽  
Rock Lobster ◽  
Tonic Activation ◽  
Left And Right ◽  
Motor Rhythm ◽  
Pass Through ◽  
The Right

1. The main oesophageal motor neurone (OD1) of the rock lobster is an unpaired bifurcating nerve cell. The cell body is located in the oesophageal ganglion and the left and right axonal branches pass through the left and right commissural ganglia to innervate all the oesophageal dilator muscles. 2. Three types of potentials are recorded in the cell body in vitro; each type is associated with an extracellular spike recorded from the nerves connecting the ganglia. 3. Comparison between the three types of potentials (and the extracellular spikes) and collision experiments shows that all three are spikes. 4. Spontaneous collisions can sometimes occur and it is concluded that one spike is generated in the oesophageal ganglion (somatofugal a-spike) while the other two are generated in the left commissural ganglion (somatopetal c-spike) or the right commissural ganglion (somatopetal c-spike). 5. Each spike initiating zone is synaptically driven. 6. The commissural zones fire short phasic bursts; each burst is composed of only one type of spike (b- or c-). The oesophageal (a-) zone gives a tonic discharge interrupted when the other zones are firing. Finally, combined firing of the spike initiating zones can generate three different patterns of discharge. 7. OD1 participates in the oesophageal motor rhythm produced by two oscillators (one in each commissural ganglion) which fire alternated series of bursts. 8. It is concluded that the three axonal spike initiating zones enable the motor neurone (1) to follow the oesophageal motor rhythm at any time regardless of which oscillator is in operation and (2) to co-ordinate phasic and tonic activation of the oesophageal dilator muscles.

Asymmetrical Effect of GABA on the Postural Orientation inClione

2000 ◽  
Vol 84 (3) ◽  
pp. 1673-1676 ◽  
Author(s):  
T. G. Deliagina ◽  
G. N. Orlovsky ◽  
A. I. Selverston ◽  
Y. I. Arshavsky
Keyword(s):  
Body Orientation ◽  
In Vitro Experiments ◽  
Marine Mollusk ◽  
Left Group ◽  
Asymmetrical Effect ◽  
Postural Orientation ◽  
Left And Right ◽  
Clione Limacina ◽  
The Right

The marine mollusk Clione limacina, when swimming, normally stabilizes the vertical body orientation by means of the gravitational tail reflexes. Horizontal swimming or swimming along inclined ascending trajectories is observed rarely. Here we report that GABA injection into intact Clione resulted in a change of the stabilized orientation and swimming with a tilt of ∼45° to the left. The analysis of modifications in the postural network underlying this effect was done with in vitro experiments. The CNS was isolated together with the statocysts. Spike discharges in the axons of two groups of motoneurons responsible for the left and right tail flexion, as well as in the axons of CPB3 interneurons mediating signals from the statocyst receptors to the motoneurons, were recorded extracellularly when the preparation was rotated in space. Normally the tail motoneurons of the left and right groups were activated with the contralateral tilt of the preparation. Under the effect of GABA, the gravitational responses in the right group of motoneurons and in the corresponding interneurons were dramatically reduced while the responses in the left group remained unchanged. The most likely site of the inhibitory GABA action is the interneurons mediating signals from the statocysts to the right group of tail motoneurons. The GABA-induced asymmetry of the left and right gravitational tail reflexes, observed in the in vitro experiments, is consistent with a change of the stabilized orientation caused by GABA in the intact Clione.

scholarly journals Developmental Brain Asymmetry. The Good and the Bad Sides

Symmetry ◽  
2022 ◽  
Vol 14 (1) ◽  
pp. 128
Author(s):  
Monica Laura Cara ◽  
Ioana Streata ◽  
Ana Maria Buga ◽  
Dominic Gabriel Iliescu
Keyword(s):  
Time Window ◽  
Brain Asymmetry ◽  
Brain Lateralization ◽  
Brain Hemispheres ◽  
Left And Right ◽  
Vitro Model ◽  
New Biomarkers ◽  
The Right ◽  
Neuropsychiatric Conditions

Brain asymmetry is a hallmark of the human brain. Recent studies report a certain degree of abnormal asymmetry of brain lateralization between left and right brain hemispheres can be associated with many neuropsychiatric conditions. In this regard, some questions need answers. First, the accelerated brain asymmetry is programmed during the pre-natal period that can be called “accelerated brain decline clock”. Second, can we find the right biomarkers to predict these changes? Moreover, can we establish the dynamics of these changes in order to identify the right time window for proper interventions that can reverse or limit the neurological decline? To find answers to these questions, we performed a systematic online search for the last 10 years in databases using keywords. Conclusion: we need to establish the right in vitro model that meets human conditions as much as possible. New biomarkers are necessary to establish the “good” or the “bad” borders of brain asymmetry at the epigenetic and functional level as early as possible.

scholarly journals II Rapporto sullo stato di attuazione della Legge 40/2004 recante “Norme in materia di procreazione medicalmente assistita” anche in confronto con le altre nazioni europee (aprile 2009)

2009 ◽  
Vol 58 (4) ◽  
Author(s):  
Carlo Casini
Keyword(s):  
Assisted Reproduction ◽  
Present Report ◽  
The Other ◽  
Human Beings ◽  
Right To Life ◽  
Medically Assisted Reproduction ◽  
Italian Law ◽  
The Law ◽  
The Right

Il contributo propone all’attenzione il II Rapporto sull’applicazione della legge italiana in materia di “procreazione medicalmente assistita” (PMA) (Legge 40/2004), elaborato nell’aprile 2009 all’indomani della quarta relazione ministeriale del 25 marzo 2009 sullo stesso tema. La particolarità del presente Rapporto consiste nell’indagare su uno dei due obiettivi della legge 40/2004: tutelare il diritto alla vita del concepito. Infatti, mentre è alta la concentrazione sull’obiettivo di “superare la sterilità e la infertilità”, lo scopo di difendere il diritto alla vita del concepito considerato dalla stessa legge “soggetto” al pari degli altri soggetti coinvolti nelle procedure di PMA, è troppo spesso dimenticato. Il Rapporto vuole proprio rimediare a tale dimenticanza e si chiede: di quanti nuovi esseri umani è stata evitata la distruzione per effetto della legge? Poiché, come si legge nel contributo, è chiaro che le tecniche di PMA per il fatto stesso di procreare “in vitro” espongono alla morte gli embrioni anche quando vengono trasferiti nelle vie genitali della donna (ed è questa, infatti, una delle principali riserve etiche nei confronti delle tecniche di PMA), l’indagine si occupa solo di vedere come è stato tutelato il diritto alla vita degli embrioni non trasferiti, cioè non destinati alla nascita, dalla Legge 40/2004. Emerge che l’effetto più benefico della legge è quello di aver evitato nel solo triennio 2005-2006-2007 la possibile formazione soprannumeraria di embrioni e la conseguente possibile distruzione, diretta o dovuta alla crioconservazione, di oltre 120.000 embrioni. La seconda parte della ricerca è condotta confrontando anche i dati di altri Paesi europei e dimostra che il rispetto dei limiti posti a tutela del diritto alla vita hanno anche garantito meglio la salute della donna e non hanno diminuito la percentuale del “successo”. Come è noto la recente sentenza n. 151/2009 della Corte Costituzionale ha gravemente compromesso la legge proprio nel punto di maggiore sensibilità nei confronti della tutela concreta del diritto alla vita del concepito. L’auspicio è che i dati raccolti in questo II rapporto vengano comunque presi in seria considerazione. ---------- The contribution proposes the II Report of April 2009 on the application of the Italian Law on “medically assisted reproduction” (PMA) (Law 40/2004). The peculiarity of the present Report consists of investigating one of the two purposes of the Law 40/2004: to protect the right to life of newborns. In fact, if, on one hand, attention to the purpose of “overcoming sterility and infertility” the Law considers, on the other hand the purpose of defending the right to life of newborn, that is considered as “subject” just like the others subjects involved in PMA procedures from the same law, is too often forgotten. The Report intends to remedy for this forgetfulness and it asks: how many new human beings have been saved thanks to the Law? It makes clear that the most beneficent effect of the Law is that, in the period 2005-2007, it has avoided the possible production of excess embryos and the consequent possible suppression – direct or due to the cryoconservation – of over 120.000 embryos. The second part of the search is conducted also comparing data of other European Countries and it shows that the respect of the imposed limits for protecting the right to life has also guaranteed the woman’s health and it has not reduced the outcome percentage.

3,4-DGE in Peritoneal Dialysis Fluids Cannot be Found in Plasma after Infusion into the Peritoneal Cavity

2008 ◽  
Vol 28 (3) ◽  
pp. 277-282 ◽  
Author(s):  
Martin Erixon ◽  
Anders Wieslander ◽  
Torbjörn Lindén ◽  
Ola Carlsson ◽  
Jan Åke Jönsson ◽  
...  
Keyword(s):  
Peritoneal Dialysis ◽  
Human Plasma ◽  
Peritoneal Cavity ◽  
Degradation Products ◽  
High Reactivity ◽  
The Other ◽  
Glucose Degradation Products ◽  
Pass Through ◽  
Dialysis Fluids

Objective Glucose degradation products (GDPs) are important in the outcome of peritoneal dialysis (PD) treatment. 3,4-dideoxyglucosone-3-ene (3,4-DGE) is the most cytotoxic GDP found in conventionally manufactured fluids and may, in addition, be recruited from 3-deoxyglucosone (3-DG). It is not known what happens with those GDPs in patients during PD. The aim of this study was to investigate if the 3,4-DGE and 3-DG in PD fluids can be found in plasma during treatment. Design PD patients were dialyzed with a conventional PD fluid containing 43 μmol/L 3,4-DGE and 281 μmol/L 3-DG. Parallel experiments were performed in rats as well as in vitro with human plasma. The rats were dialyzed with a PD fluid containing 100 μmol/L 3,4-DGE and 200 μmol/L 3-DG. Results The concentration of 3,4-DGE in the peritoneum decreased at a much higher rate than 3-DG during the dwell. 3,4-DGE was not, however, detected in the plasma of patients or rats during dialysis. The concentration of 3-DG in plasma peaked shortly after infusion of the fluid to the peritoneal cavity. The concentration of 3,4-DGE during experimental incubation in plasma decreased rapidly, while the concentration of 3-DG decreased only 10% as rapidly or less. Conclusion 3,4-DGE could not be detected in plasma from either PD patients or rats during dialysis. This is presumably due to its high reactivity. 3-DG may, on the other hand, pass through the membrane and be detected in the blood.

Implementasi Metode Penalaran CBR dalam Mengidentifikasi Gejala Awal Penyakit Jantung menggunakan Algoritma Sorensen Coeffient

2021 ◽  
Vol 5 (3) ◽  
pp. 306
Author(s):  
Vicky Agnes Arundy ◽  
Iskandar Fitri ◽  
Eri Mardiani
Keyword(s):  
Heart Rate ◽  
Heart Disease ◽  
Expert System ◽  
Blood Vessels ◽  
The Other ◽  
Case Based Reasoning ◽  
Control Heart ◽  
Left And Right ◽  
The Right ◽  
Case Based

Heart disease is a condition when the heart is experiencing a disorder. The forms of disturbance that are experienced are usually various. Usually there is a disturbance in the blood vessels of the heart, heart rate, heart cover, or congenital problems. The heart itself is a muscle consisting of four chambers. That is, the first two rooms are located at the top, the atrium (foyer) to the left and right. Then the other two rooms are at the bottom, namely the right and left ventricles. To provide information on how to diagnose the type of disease and how to control heart disease, an application of an expert system that can represent someone who is an expert in their field is needed to provide solutions to this disease problem using the Case-Based Reasoning method with the Sorensen Coeffient approach. The result of this research is the creation of an expert system for diagnosing heart disease using the Case-Based Reasoning method with the Sorensen Coeffient approach which is able to provide solutions to heart disease.Keywords:CBR, Expert system, Heart Disease, Method Sorensen Coeffient.

Bias for the Left Visual Field in Rapid Serial Visual Presentation: Effects of Additional Salient Cues Suggest a Critical Role of Attention

2015 ◽  
Vol 27 (2) ◽  
pp. 266-279 ◽  
Author(s):  
Kamila Śmigasiewicz ◽  
Dariusz Asanowicz ◽  
Nicole Westphal ◽  
Rolf Verleger
Keyword(s):  
Visual Field ◽  
Left Visual Field ◽  
Right Hemisphere ◽  
Critical Role ◽  
Visual Presentation ◽  
The Other ◽  
Early Posterior Negativity ◽  
Left And Right ◽  
The Right

Everyday experience suggests that people are equally aware of stimuli in both hemifields. However, when two streams of stimuli are rapidly presented left and right, the second target (T2) is better identified in the left hemifield than in the right hemifield. This left visual field (LVF) advantage may result from differences between hemifields in attracting attention. Therefore, we introduced a visual cue shortly before T2 onset to draw attention to one stream. Thus, to identify T2, attention was correctly positioned with valid cues but had to be redirected to the other stream with invalid ones. If the LVF advantage is caused by differences between hemifields in attracting attention, invalid cues should increase, and valid cues should reduce the LVF advantage as compared with neutral cues. This prediction was confirmed. ERP analysis revealed that cues evoked an early posterior negativity, confirming that attention was attracted by the cue. This negativity was earlier with cues in the LVF, which suggests that responses to salient events are faster in the right hemisphere than in the left hemisphere. Valid cues speeded up, and invalid cues delayed T2-evoked N2pc; in addition, valid cues enlarged T2-evoked P3. After N2pc, right-side T2 evoked more sustained contralateral negativity than left T2, least long-lasting after valid cues. Difficulties in identifying invalidly cued right T2 were reflected in prematurely ending P3 waveforms. Overall, these data provide evidence that the LVF advantage is because of different abilities of the hemispheres in shifting attention to relevant events in their contralateral hemifield.

scholarly journals The Brain-Heart Connection: Frontal Cortex and Left Ventricle Angiotensinase Activities in Control and Captopril-Treated Hypertensive Rats—A Bilateral Study

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Ana B. Segarra ◽  
Isabel Prieto ◽  
Inmaculada Banegas ◽  
Ana B. Villarejo ◽  
Rosemary Wangensteen ◽  
...  
Keyword(s):  
Drinking Water ◽  
Left Ventricle ◽  
Frontal Cortex ◽  
Treated Group ◽  
The Other ◽  
Hypertensive Rats ◽  
Membrane Bound ◽  
Left And Right ◽  
The Right ◽  
The Brain

The model ofneurovisceral integrationsuggests that the frontal cortex (FC) and the cardiovascular function are reciprocally and asymmetrically connected. We analyzed several angiotensinase activities in the heart left ventricle (VT) of control and captopril-treated SHR, and we search for a relationship between these activities and those determined in the left and right FC. Captopril was administered in drinking water for 4 weeks. Samples from the left VT and from the left and right FC were obtained. Soluble and membrane-bound enzymatic activities were measured fluorometrically using arylamides as substrates. The weight of heart significantly decreased after treatment with captopril, mainly, due to the reduction of the left VT weight. In the VT, no differences for soluble activities were observed between control and treated SHR. In contrast, a generalized significant reduction was observed for membrane-bound activities. The most significant correlations between FC and VT were observed in the right FC of the captopril-treated group. The other correlations, right FC versus VT and left FC versus VT in controls and left FC versus VT in the captopril group, were few and low. These results confirm that the connection between FC and cardiovascular system is asymmetrically organized.

scholarly journals Mechanism of how augmin directly targets the γ-tubulin ring complex to microtubules

2018 ◽  
Vol 217 (7) ◽  
pp. 2417-2428 ◽  
Author(s):  
Jae-Geun Song ◽  
Matthew R. King ◽  
Rui Zhang ◽  
Rachel S. Kadzik ◽  
Akanksha Thawani ◽  
...  
Keyword(s):  
Cell Shape ◽  
Insect Cells ◽  
The Other ◽  
Negative Stain ◽  
In Vitro Reconstitution ◽  
Ring Complex ◽  
Negative Stain Electron Microscopy ◽  
The Right ◽  
And Function

Microtubules (MTs) must be generated from precise locations to form the structural frameworks required for cell shape and function. MTs are nucleated by the γ-tubulin ring complex (γ-TuRC), but it remains unclear how γ-TuRC gets to the right location. Augmin has been suggested to be a γ-TuRC targeting factor and is required for MT nucleation from preexisting MTs. To determine augmin’s architecture and function, we purified Xenopus laevis augmin from insect cells. We demonstrate that augmin is sufficient to target γ-TuRC to MTs by in vitro reconstitution. Augmin is composed of two functional parts. One module (tetramer-II) is necessary for MT binding, whereas the other (tetramer-III) interacts with γ-TuRC. Negative-stain electron microscopy reveals that both tetramers fit into the Y-shape of augmin, and MT branching assays reveal that both are necessary for MT nucleation. The finding that augmin can directly bridge MTs with γ-TuRC via these two tetramers adds to our mechanistic understanding of how MTs can be nucleated from preexisting MTs.

scholarly journals The measurement of dorsal radial tilt by x-ray and computed tomography

2018 ◽  
Vol 64 (11) ◽  
pp. 1007-1011
Author(s):  
Jingning Li ◽  
Zhenjie Ma ◽  
Fei Gao ◽  
Yuan Ji
Keyword(s):  
Computed Tomography ◽  
Distal Radius ◽  
Distal Radius Fractures ◽  
The Other ◽  
Steel Plates ◽  
Radius Fractures ◽  
X Ray ◽  
Left And Right ◽  
The Right ◽  
Two Sides

SUMMARY OBJECTIVE: We conducted this study to define and measure the dorsal radial tilt, and to guide the reduction of distal radius fractures and the pre-bending of steel plates used in surgery. METHODS: The dorsal radial tilt was measured using both computed tomography (CT) and x-ray from both left and right side. The differences and correlations of the data measured by those two methods and from two sides were analyzed. RESULTS: The tilts measured by x-ray were significantly bigger than those measured by CT from the left side (t=55.51, p < 0.01) and from the right side (t=49.81, p < 0.01). The tilts measured by those two methods from the left and right sides were correlated (r=0.85, p < 0.01; r=0.81, p < 0.01). The dorsal radial tilts measured from the left side were not significantly different from those measured from the right side by CT (t=1.49, p > 0.05) and by x-ray (t=1.51, p > 0.05). The dorsal radial tilts measured from the left side by CT were significantly different from those measured from the right side by x-ray (t=43.07, p < 0.01), and these two sets of data were correlated (r=0.71, p < 0.01). The dorsal radial tilts measured from the left side by x-ray was significantly different from that measured from right side by CT (t=40.43, p < 0.01), and those two sets of data were also correlated (r=0.75, p < 0.01). Conclusions: The dorsal radial tilts measured from one side by one method can be used to estimate the tilts measured from the other side / the same side by the same method / the other method.

Endothelium-dependent relaxation differs in porcine pulmonary arteries from the left and right caudal lobes

2000 ◽  
Vol 88 (3) ◽  
pp. 827-834 ◽  
Author(s):  
Lynelle R. Johnson ◽  
John R. Dodam ◽  
M. Harold Laughlin
Keyword(s):  
Sodium Nitroprusside ◽  
Pulmonary Arteries ◽  
Smooth Muscle Contraction ◽  
Lower Drug ◽  
Left And Right ◽  
The Difference ◽  
The Right ◽  
Oxide Synthase ◽  
Lung Lobes

We hypothesized that pulmonary arteries (PA) from identical branch orders within left and right caudal lung lobes would exhibit similar vasomotor responses. Arterial rings from caudal lung lobes of female swine were examined in vitro. Vascular smooth muscle contraction to KCl and norepinephrine did not differ. Vascular relaxation to endothelium-dependent (bradykinin, acetylcholine, A-23187) and -independent (sodium nitroprusside, zero-calcium Krebs solution) vasodilators was assessed. Right PA exhibited less maximal relaxation to acetylcholine (50%) than did left PA (69%; P< 0.001). Maximal relaxation to sodium nitroprusside did not differ, although right PA had a lower drug concentration resulting in half-maximal relaxation (6.26 × 10−8M) than did left PA (9.57 × 10−8 M; P< 0.05). Nitric oxide synthase inhibition with an arginine analog ( N ω-nitro-l-arginine methyl ester) depressed acetylcholine-induced relaxation but the left vs. right difference persisted. Indomethacin enhanced relaxation to acetylcholine and abolished the difference between left and right. We conclude that endothelium-dependent vasorelaxation is less in porcine right than in left PA because of greater release of one or more constricting prostanoids in arteries from the right caudal lobe.

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