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2 edition of Mechanisms of visual search impairment among patients with schizophrenia. found in the catalog.

Mechanisms of visual search impairment among patients with schizophrenia.

Ava Elahipanah

Mechanisms of visual search impairment among patients with schizophrenia.

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Published .
Written in English


About the Edition

The purpose of this study was to investigate two possible mechanisms for impaired visual search performance among patients with SCZ: a narrower visual span and impaired selectivity. Consistent with previous findings, the patients in this study were more adversely affected as the number of search items increased. Importantly, patients" visual search impairment was only evident when they searched for more eccentric targets, suggesting that patients with SCZ do indeed have a narrower visual span and that visual span reduction is associated with impaired visual search. In addition, patients dynamically modulated their search such that they directed their attention to the distractor type that had the smaller number of items. Overall, these data suggest that a narrower visual span is an important mechanism of impaired visual search performance among patients with SCZ. In contrast, evidence for impaired selectivity was not found in this study.

The Physical Object
Pagination85 leaves.
Number of Pages85
ID Numbers
Open LibraryOL21219156M
ISBN 109780494274934


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Mechanisms of visual search impairment among patients with schizophrenia. by Ava Elahipanah Download PDF EPUB FB2

The current study investigated one possible mechanism of impaired visual attention among patients with schizophrenia: a reduced visual span. Visual span is the region of the visual Þeld from which one can extract information during a single eye Þxation. This study hypothesized that schizophrenia-related visual search impairment is mediated.

Research on visual perception in schizophrenia has a long history. However, it is only recently that it has been included in mainstream efforts to understand the cognitive neuroscience of the disorder and to assist with biomarker and treatment development (e.

the NIMH CNTRICS and RDoC initiatives). Advances in our understanding of visual disturbances in schizophrenia can tell us about both. The visual search task Overthepastseveraldecades,thevisualsearchparadigmhasbeen instrumental in exploring visual attention mechanisms among healthy individuals (for a review see Wolfe, ).

More recently, visual search tasks have also been employed to investigate the mechanisms of attentional impairments among patients with schizo. Visual Attention among Patients with Schizophrenia: A Study of Visual Span and Selectivity in Visual Search Author: Elahipanah, Ava Advisor: Christensen, BruceAuthor: Ava Elahipanah.

More recently, visual search tasks have also been employed to investigate the mechanisms of attentional impairments among patients with schizophrenia (SCZ) (e. Lieb et al.;Mori et al. nition to understand the cognitive mechanisms of insight in schizophrenia. Among the basic cognitive deficits in schizophrenia patients, poor insight has mainly been associated with deficits in executive functioning [1113], especially in mental flexibility, abstract reasoning, and self-reflection [14].

However, some studies have failed to find. that cognitive deficits in schizophrenia are predictive of impaired functioning. 8, Its clear from studies that cognitive impairment among patients with schizophrenia is not something thats confined to a subgroup. Its something thats relevant to virtually every individual with the disease, said Stephen R.

Marder, M.of the. The purpose of this review is to 1) describe visual impairments that manifest in patients with schizophrenia, 2) examine the relationship between visual dysfunction, assessed by laboratory tests, and the experiences of patients themselves, and 3) describe real-life experiences related to visual function in this population.

(cm) 44 ; 51. impairment in Alzheimer's Disease (Tales and Butler, ). To our knowledge, there is no report on the vMMN among patients with schizophrenia as yet. The objective of our study is to test the presence of the impaired generation of mismatch negativity after visual motion stimuli among patients with schizophrenia and schizophrenia related psychosis.

PDF | Background: One important diagnostic characteristic of schizophrenia is reality-testing impairment. Since the disease usually breaks out during | Find, read and cite all the research you.

Schizophrenia is a complex and devastating neuropsychiatric disorder with an unknown etiology. Patients with schizophrenia have a high prevalence of visual disturbances, commonly accompanied by auditory impairments.

In recent review articles, the perceptual deficits of visual and auditory sensory processing have been downplayed. However, visual and auditory impairments are associated with. The current study investigated whether impaired visual attention among patients with schizophrenia can be accounted for by poor perceptual organizatio.

Patients with schizophrenia are especially impaired in the detection of spatial location if the briefly presented target stimulus is followed by a mask in a close temporal proximity (target location backward masking (BM) paradigm).

It has been suggested that this phenomenon is related to the impairment of low spatial and high temporal frequency-sensitive transient (magnocellular) visual channels. Neural anomalies during visual search in schizophrenia patients and unaffected siblings of schizophrenia patients.

Schizophrenia Research. Journals Books; Help; Download PDF; Download full issue; Schizophrenia Research. VolumeIssues 13, JulyPages Visual mismatch negativity among patients with schizophrenia.

Author links open overlay panel Ale. Among these, the neurocognitive impairment is gradually now being seen as an integral part of schizophrenia to the extent that, many researchers imply cognitive impairment as the core the disorder (Elvevag B, Goldberg TE.). Background: One important diagnostic characteristic of schizophrenia is reality-testing impairment.

Since the disease usually breaks out during adoles. Among the most common cognitive impairments displayed in patients with schizophrenia are disorganized thought, communication, and speech. More specifically, thoughts and speech patterns may appear to be circumstantial or tangential.

For example, patients may give unnecessary details in response to a question before they finally produce the. Aim Although eyetracking technology expands beyond capturing eye data just for the sole purpose of ensuring participants maintain their gaze at the presented fixation cross, gaze technology remains.

The present study examined this effect among healthy siblings of schizophrenia patients in a Finnish isolate with high prevalence of schizophrenia. Methods: We assessed performance in verbal and visual span tasks, in tests measuring intelligence, and in declarative verbal memory and learning tasks in 31 and 67 healthy siblings from families.

Distant visual impairment was defined as binocular distant visual acuity of a LogMAR score of (Among patients who met the study criteria, the frequency of distant visual impairment was ( with schizophrenia, with bipolar disorder, with major depressive disorder). Familial loading associates with impairment in visual span among healthy siblings of schizophrenia patients.

A Tuulio-Henriksson, R Arajarvi, T Partonen, J Haukka, T Varilo, M Schreck, T Cannon, J Lonnqvist. Kansanterveystieteen osasto; Tutkimustuotos:. Free Online Library: Frequency and correlates of distant visual impairment in patients with schizophrenia, bipolar disorder, and major depressive disorder.

(Original Article, Clinical report) by "East Asian Archives of Psychiatry"; Psychology and mental health Major depressive disorder Care and treatment Complications and side effects Research Vision disorders Risk factors.

Verbal and Visual Memory Impairments Among Young Offspring and Healthy Adult Relatives of Patients With Schizophrenia and Bipolar Disorder: Selective Generational Patterns Indicate Different Developmental Trajectories.

Schizophrenia Bulletin, 37(6), Type de publication. Inter-individual variability of social perception and. - Buy The Role of Affect in Perseveration Among Patients with Schizophrenia book online at best prices in India on Read The Role of Affect in Perseveration Among Patients with Schizophrenia book reviews author details and more at Free delivery on qualified : Bonnie-Jean Thurston-Snoha.

Approximately 85 of schizophrenic patients have severe cognitive impairment. On average, schizophrenia patients' performance deficits in different domains of cognitive function are to standard deviations (SDs) below those of the healthy population.

These impairments also affect patients' social functioning. The Defense Mechanisms And A Subjective Perception Of Mental Illness Among The Daily Ward Patients With Schizophrenia And Depressive Disorders Author: Sylwia Kalinowska ISBN: OCLC Genre: File Size: 18 MB Format: PDF, ePub, Mobi Download: Read: Get This Book.

Schizophrenia is a serious and chronic mental illness that impairs a person's thoughts and behavior, and if untreated, can include psychosis. Schizophrenia is a disabling mental illness that. An exciting contribution to the field, Visual Dysfunction in Diabetes: The Science of Patient Impairment and Improvement is designed with two overriding objectives: to help readers understand the impact of vision impairment in people living daily with diabetes rather than considering diabetic retinopathy solely as a medical problem, and to explore what we know and don't know about the ways.

ERIC is an online library of education research and information, sponsored by the Institute of Education Sciences (IES) of the U. Department of Education. Schizophrenia Nursing Assessments and Interventions.

Schizophrenia is a psychiatric disorder that causes the individual to have altered thoughts, moods perceptions and behavior. It is a type of psychosis, with four subsets that include schizoaffective disorder, paranoid schizophrenia, catatonic schizophrenia and undifferentiated schizophrenia.

Heritable anisotropy associated with cognitive impairments among patients with schizophrenia and their non-psychotic relatives in multiplex families 3 September | Psychological Medicine, Vol. 3 A Family Study of Trauma and Coping Strategies in Gambling Disorder.

Studies on reward anticipation in schizophrenia have mainly focused on the neurobiological underpinnings of this process, and consistently reported an impairment in reward prediction mechanisms mediated by striatal nucThe ability to predict a reward requires a learning process.

Outcomes of Curative Intent Treatment For Prostate Cancer Among Patients With Total Visual Impairment. Journal of Surgical Research, Mohit Kumar. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper. READ PAPER. QS Outcomes of Curative Intent Treatment For Prostate.

Schizophrenia is a severe and complex psychiatric disorder resulting in delusions, hallucinations, and cognitive impairments. Across a variety of paradigms, an elevated threshold for conscious perception has been repeatedly observed in persons with schizophrenia. Remarkably, even subtle measures of subliminal processing appear to be preserved.

We argue here that the dissociation between. The neuropsychological impairments potentially represent genetic liability to the disorder, as similar, yet milder, impairments are evident in schizophrenia patients even before the onset of psychotic symptoms, as well as in the nonpsychotic relatives of schizophrenia patients.

The main causes of visual impairment included nystagmus (15), Stargardt's disease (14), maculopathies (13), myopic macular degeneration (11) and oculocutaneous albinism (7).

The percentages of visually impaired, severe visually impaired and blind wereand respectively. Spectacles were prescribed to patients and. prevalence and associated factors of visual impairment among diabetic patients at debre berhan referral hospital, north shoa, ethiopia, a thesis report submitted to university of gondar, college of medicine and health sciences, school of medicine, department of optometry in partial fulfillment of the requirements for.

This study involved patients with visual impairments. The 10th revision of the International Classification of Diseases was used to categorize the causes of visual impairments (based on the main cause in both eyes).

The mean age of the patients was ± years (range, 6–95 years), and most were in the 15–year age group (%).