Right unilateral spatial neglect in aphasic patients

Ihori, Nami; Kashiwagi, Asako; Kashiwagi, Toshihiro

doi:10.1016/j.bandl.2015.05.001

Cited by 4 publications

(3 citation statements)

References 33 publications

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“…Moreover, the prevalence of aphasia was similar for their acute LH stroke patients with (91%) and without (86%) neglect (p=0.71). Furthermore, the relationship between aphasic deficits and deficits of spatial attention might depend on the type of test (e.g., language-based or not), as Ihori and colleagues recently reported an association between aphasia severity and the degree of leftward deviations in an auditory pointing task based on word and sentence comprehension (Ihori, Kashiwagi, & Kashiwagi, 2015). However, in our sample of LH stroke patients the use of linguistic (letters) versus non-linguistic (meaningless symbols) stimuli in the two cancellation subtests of the MWCT did not affect test sensitivity for spatial inattention (see table 2).…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 97%

Apraxia and spatial inattention dissociate in left hemisphere stroke

Timpert

Weiss

Vossel³

et al. 2015

Cortex

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Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 97%

Apraxia and spatial inattention dissociate in left hemisphere stroke

Timpert

Weiss

Vossel³

et al. 2015

Cortex

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“…It must be added that these patients also had larger lesions, but a mutual mechanism of function might underlie this correlation. Similarly, left-hemispheric temporo-frontal areas, essential to language processing and meaningful planning of higher motor tasks, might also hold a key role in spatial attention (Suchan and Karnath 2011;Ihori et al 2015).…”

Section: The Left Hemisphere and Spatial Processingmentioning

confidence: 99%

Visual neglect after left-hemispheric lesions: a voxel-based lesion–symptom mapping study in 121 acute stroke patients

et al. 2016

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Visual neglect after left-hemispheric lesion is thought to be less frequent, less severe, and shorter lived than visuospatial attention deficits resulting from right-hemispheric lesions. However, reports exist opposing this assumption, and it is unclear how these findings fit into the current theories of visuospatial processing. Furthermore, only little is known about the exact structure-function relationship between visuospatial attention deficits and left-hemispheric stroke. We investigated neglect in 121 patients with acute left-hemispheric ischemic stroke by following clinical development from within the first 24 h of stroke onset until hospital discharge. Visuospatial attention deficits occurred in 17.4 % (n = 21). Voxel-based lesion-symptom mapping associated visual neglect to the right with lesion in the left superior and middle temporal gyrus, temporal pole, frontal operculum, and insula. Neglect severity, captured by the Center of Cancellation Score of the Bells test, was associated with lesion in the left anterior temporal lobe and the left frontal operculum. The left-hemispheric lesion pattern of neglect thus involves areas of the ventral attention system and partly mirrors the critical regions of the right hemisphere known to be associated with neglect. Based on our prospective analysis on a large cohort of patients with left-hemispheric stroke, this study shows that in a remarkable number of patients, the left hemisphere essentially contributes to an intact representation of space and clarifies the impact of the distinct left-hemispheric structures involved in visuospatial processing.

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“…The converse of this phenomenonright neglect in individuals with left-hemisphere damage and aphasia-is less common (Beis et al, 2004). However, despite this, a number of studies have noted some degree of decreased attention to stimuli presented on the right in PWA (Bouma & Ansink, 1988;Ihori, Kashiwagi, & Kashiwagi, 2015;Marshall, Basilakos, & Love-Myers, 2013;Petry, Crosson, Rothi, Bauer, & Schauer, 1994;Shisler, 2005).…”

Section: Motivation For Investigating Em and Im In Aphasiamentioning

confidence: 99%

Effects of Acquired Aphasia on the Recognition of Speech Under Energetic and Informational Masking Conditions

Villard

Kidd

2019

Trends in Hearing

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Persons with aphasia (PWA) often report difficulty understanding spoken language in noisy environments that require listeners to identify and selectively attend to target speech while ignoring competing background sounds or "maskers." This study compared the performance of PWA and age-matched healthy controls (HC) on a masked speech identification task and examined the consequences of different types of masking on performance. Twelve PWA and 12 age-matched HC completed a speech identification task comprising three conditions designed to differentiate between the effects of energetic and informational masking on receptive speech processing. The target and masker speech materials were taken from a closed-set matrix-style corpus, and a forced-choice word identification task was used. Target and maskers were spatially separated from one another in order to simulate real-world listening environments and allow listeners to make use of binaural cues for source segregation. Individualized frequency-specific gain was applied to compensate for the effects of hearing loss. Although both groups showed similar susceptibility to the effects of energetic masking, PWA were more susceptible than age-matched HC to the effects of informational masking. Results indicate that this increased susceptibility cannot be attributed to age, hearing loss, or comprehension deficits and is therefore a consequence of acquired cognitivelinguistic impairments associated with aphasia. This finding suggests that aphasia may result in increased difficulty segregating target speech from masker speech, which in turn may have implications for the ability of PWA to comprehend target speech in multitalker environments, such as restaurants, family gatherings, and other everyday situations.

show abstract

Right unilateral spatial neglect in aphasic patients

Cited by 4 publications

References 33 publications

Apraxia and spatial inattention dissociate in left hemisphere stroke

Apraxia and spatial inattention dissociate in left hemisphere stroke

Visual neglect after left-hemispheric lesions: a voxel-based lesion–symptom mapping study in 121 acute stroke patients

Effects of Acquired Aphasia on the Recognition of Speech Under Energetic and Informational Masking Conditions

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