Ultrastructure of nerve plexus in flatworms

1975 ◽  
Vol 157 (2) ◽  
Author(s):  
Harold Koopowitz ◽  
Paul Chien
Keyword(s):  
Nerve Plexus

Corneal Subbasal Nerve Plexus Evaluation by in Vivo Confocal Microscopy in Multiple Sclerosis: A Potential New Biomarker

2021 ◽  
pp. 1-8
Author(s):  
Diogo Fernandes ◽  
Maria Luís ◽  
Joana Cardigos ◽  
Catarina Xavier ◽  
Marta Alves ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Confocal Microscopy ◽  
Nerve Plexus ◽  
In Vivo Confocal Microscopy ◽  
Subbasal Nerve Plexus

scholarly journals The Histology and Activities of the Tube-feet of Echinocyamus pusillus

1959 ◽  
Vol s3-100 (52) ◽  
pp. 539-555
Author(s):  
DAVID NICHOLS
Keyword(s):  
Sea Urchin ◽  
Nerve Plexus ◽  
Asterias Rubens ◽  
Coelomic Epithelium ◽  
Sensory Cilia ◽  
Thin Walled ◽  
Postural Movement ◽  
Tube Feet

The histology of the suckered, buccal sensory, and respiratory tube-feet and their ampullae, where they occur, of the clypeasteroid sea-urchin Echinocyamus pusillus is described. Each suckered tube-foot possesses two sets of special muscles for attachment and detachment, a ring of mucous glands to assist in attachment, and a ring of sensory cilia. The stem retractors are in four columns, whose differential contraction provides the means of postural movement relative to the test. The ampullae of these tube-feet are exceedingly thin-walled, apparently musculo-epithelial, with anastomosing contractile elements. The canal between tube-foot and ampulla contains a swollen coelomic epithelium which may help to maintain the nerve relationships of the system. The activity of the suckered tube-feet is compared with that of the tubefeet of the starfish, Asterias rubens. The buccal tube-feet, larger than the suckered tube-feet, have large disks underlain by a thick nerve plexus supported by transverse fibres; a ring of sensory cilia surrounds the disk. They have no mucous glands and no suckers, and are presumably entirely sensory, probably both tactile (the cilia) and chemoreceptive (the disk). The respiratory tube-feet are thin-walled sacs, the walls consisting of an outer ciliated and an inner non-ciliated (coelomic) epithelium with cross-connexions for support; where the coelomic epithelium lines the pair of canals through the test it is heavily ciliated. In the specializations of its tube-feet this urchin is shown to share some features with the regular urchins and others with the spatangoids.

scholarly journals Myenteric Nerve Plexus

2020 ◽  
Author(s):  
Keyword(s):  
Nerve Plexus

Morphological study of neurons in the nerve plexus on heart base of rats and guinea pigs

1997 ◽  
Vol 62 (1-2) ◽  
pp. 1-12 ◽  
Author(s):  
Dainius H Pauza ◽  
Gertruda Skripkiene ◽  
Valdas Skripka ◽  
Neringa Pauziene ◽  
Rimvydas Stropus
Keyword(s):  
Guinea Pigs ◽  
Morphological Study ◽  
Nerve Plexus

An in vivo confocal microscopy study of corneal changes in pseudoexfoliation syndrome

2018 ◽  
Vol 29 (5) ◽  
pp. 555-560 ◽  
Author(s):  
Luca Terracciano ◽  
Michela Cennamo ◽  
Eleonora Favuzza ◽  
Litasova Julia ◽  
Orsola Caporossi ◽  
...  
Keyword(s):  
Confocal Microscopy ◽  
Anterior Segment ◽  
Senile Cataract ◽  
Nerve Plexus ◽  
Pseudoexfoliation Syndrome ◽  
Control Group ◽  
In Vivo Confocal Microscopy ◽  
Corneal Sensitivity ◽  
Corneal Layer

Purpose: To evaluate, through the in vivo confocal microscopy, the pathological changes of each corneal layer in eyes affected by pseudoexfoliation syndrome. Methods: We studied 40 eyes of 40 patients with diagnosis of unilateral senile cataract associated with pseudoexfoliation syndrome and 40 eyes of 40 control subjects with senile cataract without pseudoexfoliation syndrome. All patients underwent a complete ophthalmic examination including best corrected visual acuity, slit-lamp examination, corneal sensitivity measurement using a Cochet-Bonnet nylon thread esthesiometer, and anterior segment optical coherence tomography (Visante OCT, Carl Zeiss Meditec AG, Germany); in vivo confocal microscopy of corneal sections (endothelium, stroma, sub-basal nerve plexus, and superficial and basal epithelium) was performed with the ConfoScan 4.0 (Nidek, Japan). Results: In pseudoexfoliation syndrome group, the mean corneal sensitivity was 44.1 ± 1.3 mm and in the control group was 55.6 ± 4.7 mm. The corneas of the eyes with pseudoexfoliation syndrome were significantly less sensitive than those of control group eyes (p < 0.001). Pseudoexfoliation syndrome eyes had a lower nerve density and less nerve beadings and a higher degree of tortuosity in sub-basal plexus compared to the control group. The cell density of epithelial and endothelial layers was significantly lower in pseudoexfoliation syndrome eyes than controls. In 80% of pseudoexfoliation syndrome eyes, we found activated keratocytes and inflammatory cells in the anterior stroma. Conclusion: Our study demonstrates the morpho-structural corneal alterations in eyes affected by pseudoexfoliation syndrome, using corneal in vivo confocal microscopy as a non-invasive and high-reproducible technique to evaluate pathophysiology of each corneal layer; the sub-basal nerve plexus alterations are correlated with the lower corneal sensitivity.

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