Near and far space neglect: Task sensitivity and anatomical substrates

Aimola, Lina; Schindler, Igor; Simone, Anna Maria; Venneri, Annalena

doi:10.1016/j.neuropsychologia.2012.01.022

Cited by 72 publications

(62 citation statements)

References 52 publications

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“…For clinical patients, a dissociation is observed whereby symptoms of leftward neglect are strong for stimuli placed within reach (peripersonal space), and abate for stimuli placed outside of reach (extrapersonal space) (Aimola, Schindler, Simone, & Venneri, 2012). A similar effect of distance is observed in the general population.…”

mentioning

confidence: 77%

An investigation of the mechanisms underlying the effects of viewing distance and stimulus length on attentional asymmetries during line bisection

Nicholls

Beckman

Churches

2016

Atten Percept Psychophys

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Clinical neglect patients overattend to stimuli on their right, whereas the general population overattend to the left (pseudoneglect). Both phenomena are affected by viewing distance, whereby the attentional biases are attenuated as the stimulus moves from near to far space. Both are also affected by stimulus length and reduce in strength, or even reverse (the crossover effect), as length decreases. To gain an insight into the cognitive/neural mechanisms that underlie the effects of viewing distance and stimulus length, in two experiments we examined the interaction between the variables. In Experiment 1 we asked university students (n = 20) to perform a horizontal landmark bisection task with lines presented at varying lengths (1.2°, 6.3°, and 18.4°of viewing angle) and distances (450 and 1,350 mm). A crossover effect and pseudoneglect were observed for the short and the long lines, respectively. An effect of viewing distance was only observed for long lines. Experiment 2 was the same, except that the lines were rotated to form vertical lines. No crossover effect was observed for the short lines, but an upward bias was observed for the long lines. Once again, an effect of viewing distance was only apparent for the long lines. These results demonstrate that the crossover effect is not a general property of short lines and is specific to the horizontal dimension. Models of crossover therefore need to incorporate processes related to left-right asymmetries. The results also demonstrate that viewing distance only affects long lines, and that this happens irrespective of orientation. A model of viewing distance is discussed that incorporates a right hemisphere mechanism specialized for an interaction between the ventral and dorsal streams.

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confidence: 77%

An investigation of the mechanisms underlying the effects of viewing distance and stimulus length on attentional asymmetries during line bisection

Nicholls

Beckman

Churches

2016

Atten Percept Psychophys

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“…Neuropsychological evidence appears to support the notion that space is divided into several separable (or distinct) regions. For example, deficits in the orienting of visuospatial attention in peripersonal space have been observed after brain damage, while visuospatial orienting in extrapersonal space remains intact (or vice versa, e.g., Aimola et al, 2012;Halligan and Marshall, 1991;Van der Stoep et al, 2013). The results of studies of audiotactile extinction also point to a similar conclusion; Namely, that differences in audiotactile extinction have been observed in right brain-damaged patients when auditory stimuli are presented from either close to, or further away from, the patient in either frontal or rear space (Farnè and Làdavas, 2002).…”

Section: Neuropsychological Studies Of Visuotactile and Audiotactile mentioning

confidence: 99%

Multisensory interactions in the depth plane in front and rear space: A review

et al. 2015

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“…Occurring most often as a consequence of parietal lesions in the right hemisphere (Bisiach & Vallar, 1988;Molenberghs, Sale, & Mattingley, 2012), neglect incorporates a number of dissociable clinical syndromes characterized by a failure to spontaneously orient, attend, and respond to leftward features of objects or space (Bartolomeo & Chokron, 1999;Heilman, Watson, & Valenstein, 2003;Robertson & Halligan, 1999). Neglect can occur in a variety of sensory modalities (Brozzoli, Dematte, Pavani, Frassinetti, & Farnè, 2006) and is modified as the stimulus moves from peri-to extrapersonal space (Aimola, Schindler, Simone, & Venneri, 2012;Brain, 1941).…”

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confidence: 99%

Deviating to the right: Using eyetracking to study the role of attention in navigation asymmetries

Robertson

Forte

Nicholls

2014

Atten Percept Psychophys

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The ability to navigate accurately through the environment and avoid obstacles is essential for effective interactions with the environment. It is therefore surprising that systematic rightward errors are observed when neurologically intact participants navigate through doorways-most likely due to the operation of biases in spatial attention. These rightward errors may arise due to the operation of an extinction-like process, whereby participants overattend to the left doorpost and collide with the right one. Alternatively, rightward biases might reflect a bisection bias, such that the extrapersonal nature of the aperture causes participants to misbisect the aperture slightly to the right of true center. Because eye movements and spatial attention are closely related, in this study we used eyetracking to test the extinction and bisection models in a remote wheelchair navigation task. University students (n = 16) made rightward errors when navigating the wheelchair through a doorway, and fixated more frequently toward the right side of the aperture throughout the trial. These results are inconsistent with an extinction-based theory of navigation asymmetry, which predicts a leftward bias in eye position due to participants overattending to the left side of the doorway. Instead, the observed rightward bias in eye movements strongly supports a bisection-based theory of navigation asymmetry, whereby participants mentally "mark" the midpoint of a doorway toward the right and then head toward that point, resulting in rightward deviations. The rightward nature of participants' navigation errors and eye positions is consistent with the existence of a rightward attentional bias for extrapersonal stimuli.

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Near and far space neglect: Task sensitivity and anatomical substrates

Cited by 72 publications

References 52 publications

An investigation of the mechanisms underlying the effects of viewing distance and stimulus length on attentional asymmetries during line bisection

An investigation of the mechanisms underlying the effects of viewing distance and stimulus length on attentional asymmetries during line bisection

Multisensory interactions in the depth plane in front and rear space: A review

Deviating to the right: Using eyetracking to study the role of attention in navigation asymmetries

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