Powered by OpenAIRE graph
Found an issue? Give us feedback
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Recolector de Cienci...arrow_drop_down
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
Biblos-e Archivo
Bachelor thesis . 2023
Data sources: Biblos-e Archivo
versions View all 2 versions
addClaim

Alucinaciones visuales en la privación sensorial: ¿efecto colateral del mecanismo subyacente a las experiencias oníricas?

Visual hallucinations in sensory deprivation: Side effect of the mechanism underlying dreams?
Authors: Fernández Celdrán, Eloy;

Alucinaciones visuales en la privación sensorial: ¿efecto colateral del mecanismo subyacente a las experiencias oníricas?

Abstract

La privación sensorial resulta interesante por su capacidad para generar alucinaciones en la modalidad sensorial privada. Estas alucinaciones también ocurren en el síndrome de Charles-Bonnet, caracterizado por una pérdida o reducción en la capacidad visual. Este fenómeno se asemeja a los ensueños nocturnos, pues en ambos se desarrolla una experiencia visual como consecuencia de un bloqueo del procesamiento sensorial. Este estudio postula que ambos fenómenos comparten bases anatómicas, producidas por una reactivación compensatoria de las áreas visuales y el sistema reticular ascendente activador. Se realiza una revisión bibliográfica basada en el método PRISMA. La generación de los ensueños se ha atribuido al córtex prefrontal ventromedial que reactiva a las áreas visuales de asociación a través de zonas límbicas. En la privación sensorial y CBS, la reactivación se ha asociado a un aumento de la hiperexcitabilidad por desaferenciación y al fenómeno de liberación cortical. Esto permite que la corteza temporo-occipital reaccione a la estimulación endógena que parece provenir de áreas parietales superiores, frontales y prefrontales a través del tálamo. Este trabajo concluye con que hay pruebas que indican que puede haber una correspondencia anatómica entre ambos fenómenos, pero los datos están pendientes de ser replicados en futuras investigaciones

Sensory deprivation is interesting for its ability to generate hallucinations in the sensory deprived modality. These hallucinations also occur in Charles-Bonnet syndrome, characterized by a loss or reduction in visual capacity. This phenomenon is similar to dreams, since in both, a visual experience develops as a consequence of a blockage of sensory processing. This study postulates that both phenomena share anatomical bases, produced by a compensatory reactivation of the visual areas and the activating ascending reticular system. A literature review based on the PRISMA method is carried out. The generation of dreams has been attributed to the ventromedial prefrontal cortex which reactivates visual association areas through limbic pathways. In sensory deprivation and CBS, reactivation has been associated with increased hyperexcitability due to deafferentation and cortical release phenomena. This allows the temporo-occipital cortex to react to endogenous stimulation which appears to come from superior parietal, frontal and prefrontal areas via the thalamus. This paper concludes that there is evidence to suggest that there may be an anatomical correspondence between the two phenomena, but the data remain to be replicated in future research

Trabajo de Fin de Grado en Psicología. Curso académico 2022-2023

Country
Spain
Related Organizations
Keywords

Privación sensorial, Neuroanatomía, Charles-Bonnet syndrome (CBS), Neurociencia, Síndrome Charles-Bonnet (CBS), Ensueños, Dreamlike experiences, Visual hallucinations, Red neuronal por defecto, Sensory deprivation, Psicología, Neuroanatomy default neural network, Alucinaciones visuales, Reveries, Experiencias oníricas, Neuroscience

  • BIP!
    Impact byBIP!
    selected citations
    These citations are derived from selected sources.
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    0
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
Powered by OpenAIRE graph
Found an issue? Give us feedback
selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green