A partir de cette page vous pouvez :
Retourner au premier écran avec les dernières notices... |
Descripteurs (mots clés)
Thésaurus Mesh
> C > Cellules photoréceptrices en bâtonnet de la rétine
Cellules photoréceptrices en bâtonnet de la rétine
Photosensitive afferent neurons located in the peripheral retina, with density increases radially away from the FOVEA CENTRALIS. Being much more sensitive to light than the RETINAL CONE CELLS, the rod cells are responsible for twilight vision (at scotopic intensities) as well as peripheral vision, but provide no color discrimination.
Each rod cell contains highly differentiated compartments: include the outer segment (ROD OUTER SEGMENT), inner segment, connecting cilium, cell body, and synaptic terminal.
Each rod cell contains highly differentiated compartments: include the outer segment (ROD OUTER SEGMENT), inner segment, connecting cilium, cell body, and synaptic terminal.
Synonyme(s)
Bâtonnet rétinien; Bâtonnets (rétine); Bâtonnets de la rétine; Bâtonnets photorécepteurs; Bâtonnets photorécepteurs de la rétine; Bâtonnets rétiniens; Cellules en bâtonnet de la rétine; Cellules photoréceptrices rétiniennes en bâtonnet; Photorécepteur bâtonnet; Photorécepteurs bâtonnetsRelation(s)
- voir aussi au terme générique : [Descripteurs (mots clés)] Cellules photoréceptrices de vertébré
- voir aussi au terme spécifique : [Descripteurs (mots clés)] Segment externe de cellule en bâtonnet
Ajouter le résultat dans votre panier Affiner la recherche
Etendre la recherche sur niveau(x) vers le bas
The Invisibility of Scotomas I: The Carving Hypothesis / Eli Peli in OVS : Optometry & Vision Science, vol. 100, 08 (Aout 2023)
[article]
in OVS : Optometry & Vision Science > vol. 100, 08 (Aout 2023)
Titre : The Invisibility of Scotomas I: The Carving Hypothesis Type de document : article de périodique Auteurs : Eli Peli ; Robert Goldstein ; Jae-Hyun Jung Année de publication : 2023 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus HELB]:Paramédical:Réhabilitation
[Thésaurus Mesh]Cellules photoréceptrices en bâtonnet de la rétine
[Thésaurus Mesh]Champs visuels
[Thésaurus Mesh]ScotomeRésumé : SIGNIFICANCE
Veridical depictions of scene appearance with scotomas allow better understanding of the impact of field loss and may improve the development and implementation of rehabilitation. Explanation and depiction of the invisibility of scotoma may lead to patients' understanding and thus better compliance with related treatments.
PURPOSE
Simulations of perception with scotomas guide training, patient education, and rehabilitation research. Most simulations incorrectly depict scotomas as black patches, although the scotomas and the missing contents are usually invisible to patients. We present a novel approach to capture the reported appearance of scenes with scotomas.
METHODS
We applied a content-aware image resizing algorithm to carve out the content elided under the scotomas. With video sequences, we show how and why eye movements fail to increase the visibility of the carved scotomas.
RESULTS
Numerous effects, reported by patients, emerge naturally from the scotoma carving. Carving-eliminated scotomas over natural images are barely visible, despite causing substantial distortions. Low resolution and contrast sensitivity at farther eccentricities and saccadic blur reduce the visibility of the distortions. In a walking scenario, static objects moving smoothly to the periphery disappear into and then reemerge out of peripheral scotomas, invisibly.
CONCLUSIONS
Scotoma carving provides a viable hypothetical simulation of vision with scotomas due to loss of neurons at the retinal ganglion cell level and higher. As a hypothesis, it generates predictions that lend themselves to future clinical testing. The different effects of scotomas due to loss of photoreceptors are left for follow-up work.Note de contenu : Peli, Eli MS, OD, FAAO1∗; Goldstein, Robert PhD1; Jung, Jae-Hyun PhD, FAAO1 Permalink : https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= [article]Exemplaires
Cote Support Localisation Section Disponibilité aucun exemplaire