Read by QxMD icon Read

"Left neglect"

Kevin E Houston, A M Barrett
PURPOSE: Patching for double vision is a common palliative treatment for head-trauma patients with acquired strabismus when prisms are not feasible. METHODS: We review literature on spatial neglect and discuss possible effects of monocular occlusion on spatial attention. RESULTS: Patching the left eye has been shown to worsen spatial judgments in some brain-injured patients with left neglect by inhibiting the right superior colliculus further impairing contralateral leftward orienting (the Sprague Effect)...
August 30, 2016: Optometry and Vision Science: Official Publication of the American Academy of Optometry
Paolo Bartolomeo, Stefania de Vito, Tal Seidel Malkinson
Confabulations usually refer to memory distortions, characterized by the production of verbal statements or actions that are inconsistent with the patient's history and present situation. However, behavioral patterns reminiscent of memory confabulations can also occur in patients with right hemisphere damage, in relation to their personal, peripersonal or extrapersonal space. Thus, such patients may be unaware of their left hemiplegia and confabulate about it (anosognosia), deny the ownership of their left limbs (somatoparaphrenia), insult and hit them (misoplegia), or experience a "third", supernumerary left limb...
July 15, 2016: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
Radek Ptak, Marie Di Pietro, Jean-Michel Pignat
The initial stages of reading are characterised by parallel and effortless access to letters constituting a word. Neglect dyslexia is an acquired reading disorder characterised by omission or substitution of the initial or the final letters of words. Rarely, the disorder appears in a'pure' form that is, without other signs of spatial neglect. Neglect dyslexia is linked to damage involving the inferior parietal lobe and regions of the temporal lobe, but the precise anatomical basis of the pure form of the disorder is unknown...
October 1, 2016: Brain Research
Roberta Ronchi, Lorella Algeri, Laura Chiapella, Marcello Gallucci, Maria Simonetta Spada, Giuseppe Vallar
Right-brain-damaged patients may show a reading disorder termed neglect dyslexia. Patients with left neglect dyslexia omit letters on the left-hand-side (the beginning, when reading left-to-right) part of the letter string, substitute them with other letters, and add letters to the left of the string. The aim of this study was to investigate the pattern of association, if any, between error types in patients with left neglect dyslexia and recurrent perseveration (a productive visuo-motor deficit characterized by addition of marks) in target cancellation...
August 2016: Neuropsychologia
Korina Li, Charlotte Russell, Nikita Balaji, Youssuf Saleh, David Soto, Paresh A Malhotra
Recent work has shown that attentional deficits following stroke can be modulated by motivational stimulation, particularly anticipated monetary reward. Here we examined the effects of anticipated reward on the pathological attentional blink (AB), an index of temporal selective attention, which is prolonged in patients with right hemisphere damage and a history of left neglect. We specifically compared the effects of reward versus feedback-without-reward on the AB in 17 patients. We found that the patients all manifested impaired performance compared to healthy controls and that reward modulated the pathological blink in the patient group, but only in the second experimental session...
April 6, 2016: Neuropsychologia
Elvio Blini, Zaira Romeo, Chiara Spironelli, Marco Pitteri, Francesca Meneghello, Mario Bonato, Marco Zorzi
Unilateral Spatial Neglect, the most dramatic manifestation of contralesional space unawareness, is a highly heterogeneous syndrome. The presence of neglect is related to core spatially lateralized deficits, but its severity is also modulated by several domain-general factors (such as alertness or sustained attention) and by task demands. We previously showed that a computer-based dual-task paradigm exploiting both lateralized and non-lateralized factors (i.e., attentional load/multitasking) better captures this complex scenario and exacerbates deficits for the contralesional space after right hemisphere damage...
March 3, 2016: Neuropsychologia
Laura Veronelli, Lisa S Arduino, Luisa Girelli, Giuseppe Vallar
The bisection of lines positioned radially (with the two ends of the line close and far, with respect to the participant's body) has been less investigated than that of lines placed horizontally (with their two ends left and right, with respect to the body's midsagittal plane). In horizontal bisection, patients with left neglect typically show a rightward bias for both lines and words, greater with longer stimuli. As for radial bisection, available data indicate that neurologically unimpaired participants make a distal error, while results from right-brain-damaged patients with left spatial neglect are contradictory...
November 27, 2015: Journal of Neuropsychology
Simona Spaccavento, Fara Cellamare, Elisabetta Cafforio, Anna Loverre, Angela Craca
Unilateral spatial neglect consists of the inability of a patient to respond, orient, and attend to stimuli on the left side of a space following a right-hemisphere lesion. Many rehabilitation approaches have been proposed to reduce neglect. The aim of our study was to compare the effect of visual-scanning training (VST) and prismatic adaptation (PA) on patients with neglect following a right-hemisphere lesion. Twenty patients with left neglect were enrolled in the study. Before and after training, a comprehensive neuropsychological assessment of visuospatial abilities, evaluating personal, peripersonal, and extrapersonal neglect, was performed...
September 2016: Applied Neuropsychology. Adult
Nicolas Masson, Mauro Pesenti, Valérie Dormal
Previous studies have shown that left neglect patients are impaired when they have to orient their attention leftward relative to a standard in numerical comparison tasks. This finding has been accounted for by the idea that numerical magnitudes are represented along a spatial continuum oriented from left to right with small magnitudes on the left and large magnitudes on the right. Similarly, it has been proposed that duration could be represented along a mental time line that shares the properties of the number continuum...
August 2016: British Journal of Psychology
Nele Demeyere, Celine Gillebert, Liam Loftus, Glyn Humphreys
Left neglect is traditionally reported to be much more common and more severe than right neglect. Often this is taken as support for a right hemispheric specialisation of visuo-spatial attention. Here, we explore the incidence and severity of ego-and allocentric neglect in a consecutive acute stroke sample (N=298) and compare left versus right neglect recovery 6 months post stroke (N=121). Patients completed the hearts cancellation task from the Oxford Cognitive Screen on average after 6 days and again 6 months post-stroke...
2015: Journal of Vision
E Siéroff
Acquired spatial dyslexia is a reading disorder frequently occurring after left or right posterior brain lesions. This article describes several types of spatial dyslexia with an attentional approach. After right posterior lesions, patients show left neglect dyslexia with errors on the left side of text, words, and non-words. The deficit is frequently associated with left unilateral spatial neglect. Severe left neglect dyslexia can be detected with unlimited exposure duration of words or non-words. Minor neglect dyslexia is detected with brief presentation of bilateral words, one in the left and one in the right visual field (phenomenon of contralesional extinction)...
August 10, 2015: Annals of Physical and Rehabilitation Medicine
Nicolò Francesco Bernardi, Maria Cristina Cioffi, Roberta Ronchi, Angelo Maravita, Emanuela Bricolo, Luca Zigiotto, Laura Perucca, Giuseppe Vallar
The study assessed whether the auditory reference provided by a music scale could improve spatial exploration of a standard musical instrument keyboard in right-brain-damaged patients with left spatial neglect. As performing music scales involves the production of predictable successive pitches, the expectation of the subsequent note may facilitate patients to explore a larger extension of space in the left affected side, during the production of music scales from right to left. Eleven right-brain-damaged stroke patients with left spatial neglect, 12 patients without neglect, and 12 age-matched healthy participants played descending scales on a music keyboard...
July 6, 2015: Journal of Neuropsychology
Kevin E Houston, Russell L Woods, Robert B Goldstein, Eli Peli, Gang Luo, Alex R Bowers
PURPOSE: Although the impact of homonymous visual field defects (HFDs) on mobility has been investigated previously, the emphasis has been on obstacle detection. Relatively little is known about HFD patients' ability to judge collisions once an obstacle is detected. We investigated this using a walking simulator. METHODS: Patients with HFDs (n = 29) and subjects with normal vision (NV; n = 21) were seated in front of a large screen on which a visual simulation of walking was displayed...
June 2015: Investigative Ophthalmology & Visual Science
Andrew C Schomer, Frank W Drislane
PURPOSE: Seizures and status epilepticus causing hemispatial neglect syndromes are seldom diagnosed, in part because, without motor signs, EEGs are not performed. Also, nonconvulsive seizures are often intermittent and missed on a single EEG. Two patients had severe neglect syndromes thought due to strokes. Correct diagnosis of epileptic seizures required longer-term EEG monitoring. METHODS: Review of clinical history, neurologic examination, imaging, and findings on prolonged EEG monitoring...
April 2015: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
Corinne A Bareham, Tristan A Bekinschtein, Sophie K Scott, Tom Manly
We recently demonstrated that drowsiness, indexed using EEG, was associated with left-inattention in a group of 26 healthy right-handers. This has been linked to alertness-related modulation of spatial bias in left neglect patients and the greater persistence of left, compared with right, neglect following injury. Despite handedness being among the most overt aspects of human lateralization, studies of this healthy analogue of left neglect have only been conducted with predominantly or exclusively right-handed individuals...
2015: Scientific Reports
Marina Pavlovskaya, Nachum Soroker, Yoram S Bonneh, Shaul Hochstein
The syndrome of unilateral spatial neglect (USN) after right-hemisphere damage is characterized by failure of salient left-sided stimuli to activate an orienting response, attract attention, and gain access to conscious awareness. The explicit failure processing left-sided visual information is not uniform, however, and patients seem to be more successful performing certain visual tasks than others. The source of this difference is still not clear. We focus on processing of visual scene statistical properties, asking whether, in computing the average size of an array of objects, USN patients give appropriate weight to objects on the left; disregard left-side objects entirely; or assign them an intermediate, lower weight, in accord with their tendency to neglect these objects...
July 2015: Journal of Cognitive Neuroscience
Adriana Salatino, Marisa Poncini, Mark S George, Raffaella Ricci
A series of studies have consistently reproduced left neglect-like bias on line length estimation tasks in healthy participants by applying transcranial magnetic stimulation (TMS) over the right posterior parietal cortex (PPC), while no significant changes have been reported when stimulating the left PPC. However, a notable inter-individual variability in the right parietal site where TMS modulates visuospatial perception can be observed, and no general agreement exists on how to identify the optimal parietal site of stimulation...
2014: Frontiers in Psychology
Silvia Benavides-Varela, Marco Pitteri, Konstantinos Priftis, Laura Passarini, Francesca Meneghello, Carlo Semenza
The present study aimed at exploring basic number and calculation abilities in right-hemisphere damaged patients (RHD), focusing primarily on one-digit orally presented tasks, which do not require explicit visuo-spatial abilities. Twenty-four non mentally-deteriorated RHD patients [12 with clinical neglect (RHDN+), 12 without clinical neglect (RHDN-)], and 12 healthy controls were included in the study. Participants were administered an ad hoc numerical battery assessing abilities such as counting, number magnitude comparison, writing and reading Arabic numerals and mental calculation, among others...
2014: Frontiers in Human Neuroscience
Marine Lunven, Michel Thiebaut De Schotten, Bertrand Glize, Raffaella Migliaccio, Sophie Jacquin-Courtois, François Cotton, Paolo Bartolomeo, Gilles Rode
We present the case of a patient with left homonymous hemianopia and chronic left neglect consequent to a stroke in the occipito-temporal regions of the right hemisphere. When the patient performed cancellation tasks with her right (dominant) hand, she had severe and persistent left neglect at retest 7 and 8 years after onset. However, her performance on line bisection was invariably within normal limits. Strikingly, performance on cancellation tests reverted to normal when the patient used her left hand. White matter tractography using spherical deconvolution demonstrated damage to the splenium of the corpus callosum, as well as a relative preservation of the right fronto-parietal network...
December 2014: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
Murielle Wansard, Thierry Meulemans, Sophie Gillet, Fermin Segovia, Christine Bastin, Monica N Toba, Paolo Bartolomeo
In visual search tasks, neglect patients tend to explore and repeatedly re-cancel stimuli on the ipsilesional side, as if they did not realize that they had previously examined the rightward locations favoured by their lateral bias. The aim of this study was to explore the hypothesis that a spatial working memory deficit explains these ipsilesional re-cancellation errors in neglect patients. For the first time, we evaluated spatial working memory and re-cancellation through separate and independent tasks in a group of patients with right hemisphere damage and a diagnosis of left neglect...
October 2014: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"