Perceptual Disorders

Publication Title: 
Journal of Neurogenetics

Mutation of the human gene superoxide dismutase (hSOD1) triggers the fatal neurodegenerative motorneuron disorder, familial amyotrophic lateral sclerosis (ALS or Lou Gehrig's disease). Broad expression of this gene in Drosophila has no effect on longevity or functional senescence. We show here that restricting expression of human SOD1 primarily to motorneurons of Drosophila has significant effects on optomotor efficiency during in-flight tracking of rapidly moving visual targets.

Author(s): 
Petrosyan, Agavni
GonÁalves, Oscar F.
Hsieh, I.-Hui
Phillips, John P.
Saberi, Kourosh
Publication Title: 
Neuroscience and Biobehavioral Reviews

Disorders in verbal and emotional communication and imitation, social reciprocity and higher order cognition observed in individuals with autism spectrum disorders (ASD) are presented here as phenotypic expressions of temporo-spatial processing disorders (TSPDs). TSPDs include various degrees of disability in (i) processing multi-sensory dynamic stimuli online, (ii) associating them into meaningful and coherent patterns and (iii) producing real-time sensory-motor adjustments and motor outputs.

Author(s): 
Gepner, Bruno
FÈron, FranÁois
Publication Title: 
Schizophrenia Bulletin

Among the sensory modalities, olfaction is most closely associated with the frontal and temporal brain regions that are implicated in schizophrenia and most intimately related to the affective and mnemonic functions that these regions subserve. Olfactory probes may therefore be ideal tools through which to assess the structural and functional integrity of the neural substrates that underlie disease-related cognitive and emotional disturbances.

Author(s): 
Turetsky, Bruce I.
Hahn, Chang-Gyu
Borgmann-Winter, Karin
Moberg, Paul J.
Publication Title: 
Journal of trauma & dissociation: the official journal of the International Society for the Study of Dissociation (ISSD)

The term "dissociation" has been used to describe a wide range of psychological and psychiatric phenomena. The popular conception of dissociation describes it as a unitary phenomenon, with only quantitative differences in severity between the various dissociative conditions.

Author(s): 
Brown, Richard J.
Publication Title: 
Neuropsychologia

Neglect patients are not aware of stimuli in the contralesional space. We aimed to simulate neglect-like behaviour in healthy participants, by asking them to orient their visuospatial attention in two conditions: non-hypnotic suggestion and post-hypnotic suggestion. Results showed that directing visuospatial attention to one side of space caused neglect of stimuli in the opposite side of space, but only when participants were under post-hypnotic suggestion.

Author(s): 
Priftis, Konstantinos
Schiff, Sami
Tikhonoff, Valérie
Giordano, Nunzia
Amodio, Piero
Umiltà, Carlo
Casiglia, Edoardo
Publication Title: 
Journal of trauma & dissociation: the official journal of the International Society for the Study of Dissociation (ISSD)

Careful study of the posttraumatic stress disorder and hypnosis literatures reveals some parallels between posttraumatic flashbacks and responses to posthypnotic suggestions. Highly susceptible subjects can slip into hypnosis spontaneously and accept and respond to implied or inadvertent suggestions, some of which may operate in a manner equivalent to posthypnotic suggestions. Later, exposure to appropriate cues may trigger an intrusive revivification of the hypnotic state in which the suggestion occurred.

Author(s): 
Lovern, John
Publication Title: 
Pain

A mounting body of literature recommends that treatment for fibromyalgia (FM) encompass medications, exercise and improvement of coping skills. However, there is a significant gap in determining an effective counterpart to pharmacotherapy that incorporates both exercise and coping. The aim of this randomized controlled trial was to evaluate the effects of a comprehensive yoga intervention on FM symptoms and coping.

Author(s): 
Carson, James W.
Carson, Kimberly M.
Jones, Kim D.
Bennett, Robert M.
Wright, Cheryl L.
Mist, Scott D.
Publication Title: 
The Canadian Journal of Neurological Sciences. Le Journal Canadien Des Sciences Neurologiques

BACKGROUND: Abnormal somatosensory processing may contribute to motor impairments observed in Parkinson's disease (PD). Dopaminergic medications have been shown to alter somatosensory processing such that tactile perception is improved. In PD, it remains unclear whether the temporal sequencing of tactile stimuli is altered and if dopaminergic medications alter this perception. METHODS: Somatosensory tactile perception was investigated using temporal order judgment in patients with Parkinson's disease on and off dopaminergic medications and in aged-matched healthy controls.

Author(s): 
Nelson, Aimee J.
Premji, Azra
Rai, Navjot
Hoque, Tasnuva
Tommerdahl, Mark
Chen, Robert
Publication Title: 
Brain and Cognition

This study was conducted to determine whether school-aged children who had experienced a perinatal stroke demonstrate evidence of persistent spatial neglect, and if such neglect was specific to the visual domain or was more generalized. Two studies were carried out. In the first, 38 children with either left hemisphere (LH) or right hemisphere (RH) damage and 50 age-matched controls were given visual cancellation tasks varying in two factors: target stimuli and stimulus array.

Author(s): 
Thareja, Tarika
Ballantyne, Angela O.
Trauner, Doris A.
Publication Title: 
Journal of Clinical Nursing

This paper reviews the literature related to the Intensive Care Unit (ICU) Syndrome. The intention of the paper is to explore the range of psychotic and affective phenomena that may be observed in practice, together with the management of contributory stressors. Patients experience a range of psycho-affective disturbances that may be triggered by drugs, the environment, dehumanizing practices and sleep deprivation. Symptoms do not always disappear following discharge and further research is required to determine the long-term psychological effects of an ICU.

Author(s): 
Hewitt, Jeanette
Subscribe to RSS - Perceptual Disorders