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1. Chaetotaxy of the monogeneans Macrogyrodactylus clarii and M. congolensis from the gills and skin of the catfish Clarias gariepinus in Egypt, with a note on argentophilic elements in the nervous system

Creator:
El-Naggar, Mohammed M., Arafa, Safaa Z., El-Abbassy, Sameer A., and Kearn, Graham C.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
Monogenea, Macrogyrodactylus clarii, Macrogyrodactylus congolensis, surface sensilla, nervous system, chaetotaxy, and Clarias gariepinus
Language:
English
Description:
A comparison has been made between the chaetotaxy of the gyrodactylid monogeneans Macrogyrodactylus clarii Gussev, 1961 and M. congolensis (Prudhoe, 1957) Yamaguti, 1963 from the gills and skin, respectively, of the catfish Clarias gariepinus (Burchell) from the river Nile in Egypt. Bilaterally arranged argentophilic structures on the surface of these parasites are presumed to be sensilla and are more abundant in M. clarii than in M. congolensis especially on the ventral surface (124 vs. 66). In both species these sensilla are concentrated on the head lobes and in the pharyngeal region, but there are features of the sensilla patterns that can be used to distinguish the two species. Comparison is made with sensilla patterns of other gyrodactylids. A system of cells and dendritic processes, most probably part of the nervous system, also has an affinity for silver in the two species. There are no previous records of extensive argentophilic elements in the nervous systems of monogeneans.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

2. Cholinesterázy v analýze a diagnostice

Creator:
Miroslav Pohanka
Format:
print, bez média, and svazek
Type:
article, články, model:article, and TEXT
Subject:
Věda. Všeobecnosti. Základy vědy a kultury. Vědecká práce, diagnostika (lékařství), toxikologie, nervový systém, disertace, vysokoškolské kvalifikační práce, medical diagnostics, toxicology, nervous system, dissertations, Česko, Czechia, 12, and 00
Language:
Czech
Description:
Miroslav Pohanka.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

3. Effect of stimulation of sublobule IX-b of the cerebellar vermis on cardiac function

Creator:
Rocha, Isabel, Gonçalves, V., Bettencourt, M. J., and Silva-Carvalho, L.
Format:
print, bez média, and svazek
Type:
article, články, model:article, and TEXT
Subject:
Fyziologie člověka a srovnávací fyziologie, fyziologie, mozeček, nervový systém, physiology, cerebellum, nervous system, vermis, cardiac function, 14, and 612
Language:
English
Description:
Activation of sublobule IX-b of the cerebellar vermis evokes hypotension, bradycardia and decrease of the phrenic nerve activity in the anesthetized animal. Cardiac performance during the isovolumic phases of systole and relaxation can be evaluated by dP/dt max, Vpm, dP/dt/DP40 and τ, respectively. In the present study, we evaluated the changes on cardiac function evoked by the stimulation of sublobule IX-b. New Zealand white rabbits were anesthetized, paralyzed and artificially ventilated. A posterior craniotomy was made to reveal and stimulate the cerebellar uvula (4 s train; 50 Hz; 1 ms; 20 μA). The femoral artery and veins were cannulated and a Swan-Ganz catheter was advanced in the upper abdominal aorta to control afterload when inflating the balloon. The left ventricle was catheterized with a Millar catheter. Blood pressure, heart rate, left ventricular pressure were monitored. Results showed a significant decrease on sublobule IX-b stimulation of all the indices of systolic function and an increase of τ indicating a decrease in the speed of the relaxation. These data provide the first evidence of the influence of sublobule IX-b on cardiac function. They may contribute to the understanding of the origin the cardiovascular changes that were observed in two patients with vermian and paravermian hemorrhage., I. Rochas, V. Gonçalves, M. J. Bettencourt, L. Silva-Carvalho., and Obsahuje bibliografii a bibliografické odkazy
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

4. Optical character recognition motivated by Primate Visual System

Creator:
Borji, Ali and Hamidi, Mandana
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
Visual system, standard model, handwritten digit, nervous system, visual ventral stream, Persian, English, OCR, and HMAX
Language:
English
Description:
A visual nervous system inspired approach to optical character recognition is proposed in this paper with the hope to touch human performance in a limited extent. Particularly, the application of features motivated by the hierarchical structure of the visual ventral stream for recognition of both English and Persian handwritten digits is investigated. Features are derived by combining position and scale invariant edge detectors in a hierarchy over neighboring positions and multiple orientations. The extracted features are then used to train and test a classifier. We examine three types of classifiers: ANN, SVM and kNN to show that features are not dependent on a specific classifier which is in support of these features. The evaluation of the proposed method over standard Persian and English handwritten digit datasets shows high recognition rates of 99.63% and 98.9%, respectively. A stability analysis is also performed to demonstrate the robustness of this method to orientation, scale, and translation distortions.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

5. The nervous system of Polystoma indicum (Monogenea: Polystomatidae) as revealed by nonspecific esterase localization

Creator:
Dutta, M. and Tandon, V.
Format:
print
Type:
model:internalpart and TEXT
Subject:
Polystoma indicum, Polystomatida, Monogenea, nervous system, and nonspecific esterases
Language:
English
Description:
Using the localization of nonspecific esterases, the nervous system of Polystoma indicum Diengdoh et Tandon, 1991 could be revealed in toto. The nervous system is bilaterally symmetrical. Cerebral ganglia, which are connected by a thick dorsal commissure, are present dorsal to the pharynx. From the cerebral ganglia arise five anterior pairs and four posterior pairs of nerve trunks. The anterior nerves and/or their fine branches join to form a conspicuous circumoral nerve ring complex. The posterior nerves unite in the opisthaptoral region to form two main haptoral nerves, the branches from which innervate the components of the opisthaptor. Presence of nerve cells is also revealed in association with the main nerves, more predominantly in the vicinity of the opisthaptoral suckers.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public