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Unilateral spatial neglect

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https://www.readbyqxmd.com/read/28429801/the-dizzy-patient-don-t-forget-disorders-of-the-central-vestibular-system
#1
REVIEW
Thomas Brandt, Marianne Dieterich
Vertigo and dizziness are among the most common complaints in neurology clinics, and they account for about 13% of the patients entering emergency units. In this Review, we focus on central vestibular disorders, which are mostly attributable to acute unilateral lesions of the bilateral vestibular circuitry in the brain. In a tertiary interdisciplinary outpatient dizziness unit, central vestibular disorders, including vestibular migraine, comprise about 25% of the established diagnoses. The signs and symptoms of these disorders can mimic those of peripheral vestibular disorders with sustained rotational vertigo...
April 21, 2017: Nature Reviews. Neurology
https://www.readbyqxmd.com/read/28358553/shifts-of-spatial-attention-underlie-numerical-comparison-and-mental-arithmetic-evidence-from-a-patient-with-right-unilateral-neglect
#2
Nicolas Masson, Mauro Pesenti, Françoise Coyette, Michael Andres, Valérie Dormal
OBJECTIVES: Recent findings suggest that mental arithmetic involves shifting attention on a mental continuum in which numbers would be ordered from left to right, from small to large numbers, with addition and subtraction causing rightward or leftward shifts, respectively. Neuropsychological data showing that brain-damaged patients with left neglect experience difficulties in solving subtraction but not addition problems support this hypothesis. However, the reverse dissociation is needed to establish the causal role of spatial attention in mental arithmetic...
March 30, 2017: Neuropsychology
https://www.readbyqxmd.com/read/28242798/visuospatial-asymmetries-arise-from-differences-in-the-onset-time-of-perceptual-evidence-accumulation
#3
Daniel P Newman, Gerard M Loughnane, Simon P Kelly, Redmond G O'Connell, Mark A Bellgrove
Healthy subjects tend to exhibit a bias of visual attention whereby left hemifield stimuli are processed more quickly and accurately than stimuli appearing in the right hemifield. It has long been held that this phenomenon arises from the dominant role of the right cerebral hemisphere in regulating attention, however, methods that would allow for a more precise understanding of the mechanisms underpinning visuospatial bias have remained elusive. We sought to finely trace the temporal evolution of spatial biases by leveraging a novel bilateral dot motion detection paradigm...
February 27, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28190682/perception-of-active-head-rotation-in-patients-with-severe-left-unilateral-spatial-neglect
#4
Shinobu Kaibe, Manabu Okita, Hideto Kaba
Unilateral spatial neglect is a common neurological syndrome following predominantly right hemisphere damage, and is characterized by a failure to perceive and report stimuli in the contralesional side of space. To test the reference shift hypothesis that contralesional spatial neglect in right-brain-damaged patients is attributed to a rightward deviation of the egocentric reference frame, we measured the final angular position to which controls and left-side neglect patients actively turned their head toward the left in response to a verbal instruction given from each of three locations-right, left, and front-in two conditions, with and without visual feedback...
February 9, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28130656/patients-characteristics-and-outcomes-depending-on-complete-or-incomplete-unilateral-spatial-neglect
#5
Junko Watanabe, Toshiyasu Ogata, Masani Nonaka, Mitsutoshi Iwaasa, Etsuji Shiota, Tooru Inoue
Unilateral spatial neglect (USN) is known to depress the activities of daily living. The purpose of this study was to clarify that categorizing the type of USN using line cancelation and line bisection tests is important when evaluating patients with acute intracerebral hemorrhage (ICH). In this study, patients with ICH were prospectively evaluated for the presence of USN using line cancelation and line bisection tests. They were classified into an incomplete USN group (iUSN = abnormal results in either test) or a complete USN group (cUSN = abnormal findings in both tests)...
January 27, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28107653/re-assessing-acalculia-distinguishing-spatial-and-purely-arithmetical-deficits-in-right-hemisphere-damaged-patients
#6
S Benavides-Varela, D Piva, F Burgio, L Passarini, G Rolma, F Meneghello, C Semenza
Arithmetical deficits in right-hemisphere damaged patients have been traditionally considered secondary to visuo-spatial impairments, although the exact relationship between the two deficits has rarely been assessed. The present study implemented a voxelwise lesion analysis among 30 right-hemisphere damaged patients and a controlled, matched-sample, cross-sectional analysis with 35 cognitively normal controls regressing three composite cognitive measures on standardized numerical measures. The results showed that patients and controls significantly differ in Number comprehension, Transcoding, and Written operations, particularly subtractions and multiplications...
March 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/27998667/validity-and-reliability-of-a-novel-instrumented-one-legged-hop-test-in-patients-with-knee-injuries
#7
Karin Mani, William F Brechue, Bernd Friesenbichler, Nicola A Maffiuletti
BACKGROUND: Conventional one-legged hop tests simply evaluate the total hop distance, thus neglecting important temporal and spatial parameters related to the strategy of execution, such as foot contact time. AIM: To examine the validity and reliability of an instrumented one-legged hop test, the "four hops, three contacts" (4H3C) test, in patients with knee injuries. METHODS: The 4H3C test consists of four consecutive one-legged hops, of which individual hop distance and foot contact time are recorded by a validated floor-based photocell system...
December 17, 2016: Knee
https://www.readbyqxmd.com/read/27986428/rehabilitation-of-unilateral-neglect-evidence-based-medicine
#8
REVIEW
Philippe Azouvi, Sophie Jacquin-Courtois, Jacques Luauté
BACKGROUND: In the last decades, several rehabilitation methods have been developed to improve spatial neglect. These can be classified according to their theoretical basis: (i) enhance awareness of neglect behaviour through a top-down mechanism; (ii) low-level bottom-up sensory stimulation; (iii) modulation of inhibitory processes; (iv) increase arousal. OBJECTIVE: The purpose of this study was to provide an overview of the evidence on the effectiveness of rehabilitation procedures for unilateral neglect...
December 13, 2016: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/27977072/mechanical-pinprick-pain-in-patients-with-unilateral-spatial-neglect-the-influence-of-space-representation-on-the-perception-of-nociceptive-stimuli
#9
V Vizzari, S Barba, P Gindri, S Duca, D Giobbe, P Cerrato, G Geminiani, D M Torta
BACKGROUND: Crossing the hands over the midline can reduce the perceived intensity of nociceptive stimuli applied onto the hands. It remains unclear to what extent intact representation of peripersonal space influences this effect. Here we used the crossed-hands paradigm in patients with unilateral spatial neglect, a neuropsychological condition characterized by the inability to detect, attend and respond to contralesional (most often left) stimuli, and spared ability to process stimuli in the non-affected space...
April 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/27951747/differences-between-left-and-right-sided-neglect-revisited-a-large-cohort-study-across-multiple-domains
#10
Antonia F Ten Brink, Jurre H Verwer, J Matthijs Biesbroek, Johanna M A Visser-Meily, Tanja C W Nijboer
Unilateral spatial neglect (USN) is a syndrome that can occur after right- and left-hemisphere damage. It is generally accepted that left-sided USN is more severe than right-sided USN. Evidence for such a difference in other domains is lacking. Primary aims were to compare frequency, severity, region specificity, cognition, physical functioning, and physical independence between left and right USN. Secondary aims were to compare lesion characteristics. A total of 335 stroke patients admitted for inpatient rehabilitation were included...
December 12, 2016: Journal of Clinical and Experimental Neuropsychology
https://www.readbyqxmd.com/read/27934544/a-rehabilitation-program-based-on-music-practice-for-patients-with-unilateral-spatial-neglect-a-single-case-study
#11
Alma Guilbert, Sylvain Clément, Christine Moroni
Two major limitations of unilateral spatial neglect (USN) rehabilitation methods are actually reported: a lack of long-term efficiency and a lack of generalization to daily life. The aim of our case study was to underline how a multisensory method-music practice-could avoid these limitations. Mrs BV suffered from a chronic severe USN. She had rehabilitation sessions of music practice over 8 weeks. An improvement of her USN was found on paper-pencil tests but also in daily activities. Benefits subsisted 4 months after rehabilitation...
December 9, 2016: Neurocase
https://www.readbyqxmd.com/read/27916756/-repetitive-transcranial-magnetic-stimulation-rtms-for-higher-brain-function-deficits
#12
REVIEW
Yukichi Inoue
The management of higher brain dysfunctions such as stroke-induced unilateral spatial neglect (USN) or aphasia is crucial because these dysfunctions have devastating neurological repercussions on the patients' daily life and quality of life. Impairment of the physiological interhemispheric rivalry is often the result of brain insults such as strokes or traumatic injuries, and it may lead to USN or aphasia. Repetitive transcranial magnetic stimulation (rTMS), a non-invasive brain stimulation method, is a promising tool for restoring the pathological imbalance in interhemispheric rivalry by either suppressing the hyperactivity of the unaffected hemisphere or facilitating hypoactivity in the affected hemisphere...
December 2016: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/27716442/treatment-of-unilateral-spatial-neglect-after-stroke-using-transcranial-direct-current-stimulation-eletron-trial-study-protocol-for-a-randomized-controlled-trial
#13
Gustavo José Luvizutto, Gabriela Rizzo Soares Rizzati, Marcelo Ortolani Fogaroli, Rodrigo Thomazi Rodrigues, Priscila Watson Ribeiro, Hélio Rubens de Carvalho Nunes, Gabriel Pereira Braga, Rafael Dalle Molle da Costa, Silméia Garcia Zanati Bazan, Luiz Antônio de Lima Resende, Adriana Bastos Conforto, Rodrigo Bazan
BACKGROUND: Unilateral spatial neglect (USN) is characterized by the inability to report or respond to people or objects that are presented in the spatial hemisphere that is contralateral to the lesioned hemisphere of the brain. USN has been associated with poor functional outcomes and long stays in hospitals and rehabilitation centers. Noninvasive brain stimulation, such as transcranial direct current stimulation (tDCS), has been used in people who have been affected by USN after stroke...
October 3, 2016: Trials
https://www.readbyqxmd.com/read/27676987/what-is-the-relation-between-unilateral-spatial-neglect-and-verticality-perception-biases-after-stroke
#14
Marie Jaeger, Eve Dupierrix, Céline Piscicelli, Anne Chrispin, Patrice Davoine, Dominic Pérennou
OBJECTIVE: Unilateral spatial neglect (USN) and verticality perception biases are frequently associated after right hemispheric cerebral stroke (Pérennou et al., 2006). These troubles in spatial cognition have also in common to present different clinical types, according to the space considered: personal (PN) and extra-personal neglect (EPN), and biases in the visual (VV) or the postural (PV) vertical. Here, we hypothesized that PN is specially related to a biased PV, and that EPN could be more related to a biased VV...
September 2016: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/27676869/pediatric-stroke-rehabilitation-a-review-of-techniques-facilitating-motor-recovery
#15
Eleni Papathanasiou, Mathilde Chevignard, Carole Vuillerot, Anne Tiberghien, Ingrid Godard
OBJECTIVE: Paediatric stroke is a relatively rare medical condition, but it often leads to long lasting motor and cognitive impairments. Rehabilitation of motor impairments has been widely studied, with most studies performed in children with cerebral palsy (CP). However, CP covers a variety of medical conditions, including brain lesions due to paediatric stroke occurring early in life, but not stroke occurring later on during childhood. The specificity of rehabilitation after paediatric stroke remains understudied...
September 2016: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/27663624/intentional-gaze-shift-to-neglected-space-a-compensatory-strategy-during-recovery-after-unilateral-spatial-neglect
#16
Yusaku Takamura, Maho Imanishi, Madoka Osaka, Satoko Ohmatsu, Takanori Tominaga, Kentaro Yamanaka, Shu Morioka, Noritaka Kawashima
Unilateral spatial neglect is a common neurological syndrome following predominantly right hemispheric stroke. While most patients lack insight into their neglect behaviour and do not initiate compensatory behaviours in the early recovery phase, some patients recognize it and start to pay attention towards the neglected space. We aimed to characterize visual attention capacity in patients with unilateral spatial neglect with specific focus on cortical processes underlying compensatory gaze shift towards the neglected space during the recovery process...
September 23, 2016: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/27494287/assessing-for-unilateral-spatial-neglect-using-eye-tracking-glasses-a-feasibility-study
#17
Brenton Kortman, Kate Nicholls
The aim of this feasibility study was to identify whether eye-tracking glasses could sensitively differentiate unilateral spatial neglect (USN) among a sample of participants who had a stroke, and to determine whether a larger study was viable. A sample of 13 inpatients (N = 7 with neglect, N = 6 without neglect) aged 50-78 years undertook a task while wearing Tobii eye-tracking glasses. The kitchen environment and the task of making a cup of coffee were standardized. Two commonly reported tests for USN, the Bells Test and the Line Crossing Test, were also used as a reference standard for the eye-tracking data...
August 5, 2016: Occupational Therapy in Health Care
https://www.readbyqxmd.com/read/27390439/propensity-matched-analysis-of-the-gap-between-capacity-and-actual-performance-of-dressing-in-patients-with-stroke
#18
Takaaki Fujita, Atsushi Sato, Yuichi Yamamoto, Koji Otsuki, Kazuaki Iokawa, Toshimasa Sone, Manabu Midorikawa, Kenji Tsuchiya, Lee Bumsuk, Fusae Tozato
[Purpose] Dressing is an activity of daily living for which stroke patients often show discrepancies between capacity and actual performance. The aim of this study was to elucidate the physical function and unilateral spatial neglect in stroke patients that reduce their level of actual performance despite having the capacity for dressing independently. [Subjects and Methods] This retrospective study included 60 first-time stroke patients judged by occupational therapists as able to dress independently. The patients were divided into two groups according to their FIM(®) instrument scores for dressing the upper and lower body: an independent group with both scores ≥6 and an assistance group with one or both scores ≤5...
June 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/27294994/examining-the-feasibility-tolerability-and-preliminary-efficacy-of-repetitive-task-specific-practice-for-people-with-unilateral-spatial-neglect
#19
Emily S Grattan, Catherine E Lang, Rebecca Birkenmeier, Margo Holm, Elaine Rubinstein, Jessie Van Swearingen, Elizabeth R Skidmore
OBJECTIVE: We examined the feasibility, tolerability, and preliminary efficacy of repetitive task-specific practice for people with unilateral spatial neglect (USN). METHOD: People with USN ≥6 mo poststroke participated in a single-group, repeated-measures study. Attendance, total repetitions, and satisfaction indicated feasibility and pain indicated tolerability. Paired t tests and effect sizes were used to estimate changes in upper-extremity use (Motor Activity Log), function (Action Research Arm Test), and attention (Catherine Bergego Scale)...
July 2016: American Journal of Occupational Therapy: Official Publication of the American Occupational Therapy Association
https://www.readbyqxmd.com/read/27271690/exogenous-orienting-of-attention-in-hearing-a-virtual-reality-paradigm-to-assess-auditory-attention-in-neglect-patients
#20
Alma Guilbert, Sylvain Clément, Yves Martin, Alexia Feuillet, Christine Moroni
While mechanisms of orienting attention in unilateral spatial neglect (USN) have frequently been studied in the visual domain, these mechanisms remain relatively unexplored in the auditory domain. Our first goal was to replicate Spence and Driver's (J Exp Psychol Hum 22:1005-1030, 1994) results with a virtual reality paradigm. This paradigm simulated a 3-dimensional auditory space with headphones. Our second aim was to study auditory profiles of orienting attention in USN. In a first experiment, 18 healthy participants performed an auditory cueing spatial paradigm (either a target-detection task or a target-lateralization task)...
October 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
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