Right hemispheric dominance for mediating cerebral activation

Heilman, Kenneth M.; Abell, Thomas Van Den

doi:10.1016/0028-3932(79)90077-0

Cited by 343 publications

(139 citation statements)

References 14 publications

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“…However, responses to the right side of space were generated by interactions among frontal and parietal cortices in both hemispheres. These results support the idea of a hemispheric asymmetry in a frontoparietal network that is in accordance with the right-hemisphere dominance model originally proposed by Heilman andVan Den Abell (1979) andMesulam (1981). Interestingly, we found an increase in the interhemispheric connection from right to left parietal cortex.…”

Section: Discussionsupporting

confidence: 79%

Effective Connectivity Reveals Right-Hemisphere Dominance in Audiospatial Perception: Implications for Models of Spatial Neglect

et al. 2014

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Detecting the location of salient sounds in the environment rests on the brain's ability to use differences in sounds arriving at both ears. Functional neuroimaging studies in humans indicate that the left and right auditory hemispaces are coded asymmetrically, with a rightward attentional bias that reflects spatial attention in vision. Neuropsychological observations in patients with spatial neglect have led to the formulation of two competing models: the orientation bias and right-hemisphere dominance models. The orientation bias model posits a symmetrical mapping between one side of the sensorium and the contralateral hemisphere, with mutual inhibition of the ipsilateral hemisphere. The right-hemisphere dominance model introduces a functional asymmetry in the brain's coding of space: the left hemisphere represents the right side, whereas the right hemisphere represents both sides of the sensorium. We used Dynamic Causal Modeling of effective connectivity and Bayesian model comparison to adjudicate between these alternative network architectures, based on human electroencephalographic data acquired during an auditory location oddball paradigm. Our results support a hemispheric asymmetry in a frontoparietal network that conforms to the right-hemisphere dominance model. We show that, within this frontoparietal network, forward connectivity increases selectively in the hemisphere contralateral to the side of sensory stimulation. We interpret this finding in light of hierarchical predictive coding as a selective increase in attentional gain, which is mediated by feedforward connections that carry precision-weighted prediction errors during perceptual inference. This finding supports the disconnection hypothesis of unilateral neglect and has implications for theories of its etiology.

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Section: Discussionsupporting

confidence: 79%

Effective Connectivity Reveals Right-Hemisphere Dominance in Audiospatial Perception: Implications for Models of Spatial Neglect

et al. 2014

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“…In contrast to the HAROLD model, our data are indicative of asymmetries in hemispheric processing in the direction of the attentional orienting hypothesis (Heilman & Van Den Abell, 1979;Reuter Lorenz et al, 1990) and suggest that tasks like visuo-spatial line bisection, tactile rod bisection and mental number line bisection predominantly engage attentional orienting mechanisms in the right parietal cortex (Thiebaut de Schotten et al, 2005;Varnava et al, 2013). We assert, based on the present data, that a very similar neural signature is produced in older adults.…”

contrasting

confidence: 76%

“…The most widely accepted theory of pseudoneglect is that the right cerebral hemisphere orients attention towards contralateral left space due to its dominant role in spatial processing (Heilman & Van Den Abell, 1979;Reuter-Lorenz, Kinsbourne & Moscovitch, 1990). This 'Attentional Orienting Hypothesis' is very well supported by behavioural data (Bultitude & Toba, Cavanagh & Bartolomeo, 2011), neuroimaging data (Thiebaut de Schotten, Urbanski, Duffau et al, 2005;Thiebaut de Schotten, Dell'Acqua, Frokel et al, 2011;Varnava, Dervinis & Chambers, 2013) and clinical data -patients with right hemisphere damage err rightward not leftward on spatial tasks (Dormal, Schuller, Nihoul & Pesenti & Andres, 2014;Manfredini, Mancini, Posteraro & Savazzi, 2013;Robertson & Marshall, 1993).…”

Section: Introductionmentioning

confidence: 99%

Adult developmental trajectories of pseudoneglect in the tactile, visual and auditory modalities and the influence of starting position and stimulus length

Brooks

Darling

Malvaso

et al. 2016

Brain and Cognition

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Pseudoneglect is a tendency to pay more attention to the left side of space, typically demonstrated on tasks like visuo-spatial line bisection, tactile rod bisection and the mental representation of numbers. The developmental trajectory of this bias on these three tasks is not fully understood. In the current study younger participants aged between 18 and 40 years of age and older participants aged between 55 and 90 years conducted three spatial tasks: 1) visuospatial line bisection -participants were asked to bisect visually presented lines of different lengths at the perceived midpoint; 2) touch-driven tactile rod bisection in the absence of vision -participants were asked to feel the length of a wooden rod with their index finger and bisect the rod at the perceived centre; and 3) mental number line bisection in the absence of vision -participants were asked to listen to a pair of numbers and respond with the numerical midpoint between the pair. The results showed that both younger and older participants demonstrated pseudoneglect (leftward biases) in the visual, tactile and mental number line tasks and that the magnitude of pseudoneglect for each group was influenced by physical or mentally represented starting side (start left versus start right) and stimulus length. We provide an exploration of pseudoneglect in younger and older adults in different tasks that vary in the degree to which mental representations are accessed and argue that pseudoneglect is a result of a right hemisphere attentional orienting process that is retained throughout adulthood. Our results indicate that, contrary to some current models of cognitive ageing, asymmetrical patterns of hemispheric activity may occur in older age.

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“…A number of investigators have taken up the problem of the nature of the attentional balance between the hemispheres. For example, Heilman and Van Den Abell (1979) have shown that a warning signal directed either to the right or left side of the visual field can effect a significant reduction in simple reaction time to a stimulus subsequently presented to the same side of the visual field. They interpreted this result as evidence for the capacity of the hemispheres to be separately activated, and to sustain different levels of activation over a short period of time.…”

Section: Hemispheric Activationmentioning

confidence: 99%

Dual hemispheric processing in a letter matching task

Coney

1985

Perception & Psychophysics

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It has been reported that performance on recognition, detection, and matching tasks is enhanced if stimuli are projected to both sides of the visual field rather than to one side alone (Dimond, 1972). The present study investigated the claim that this phenomenon is due to the distribution of the burden of perceptual processing between the hemispheres. Three experiments were carried out using a matching paradigm in which RT and response errors were recorded. In all experiments, subjects were required to match two letters that were displayed separately on either side of a central fixation point (bilateral presentation) or were displayed together on the same side of the visual field (unilateral presentation). It was found that although lateral interference between adjacent stimuli was significantly implicated in the phenomenon, a strong residual effect, which could be tentatively ascribed to hemispheric mechanisms, remained in relation to letter name matches. It is argued that a model based on parallel hemispheric decision processes provides a better account of the data than does one based upon the notion of distributed perceptual processing.Several studies (e.g., Dimond, 1970Dimond, , 1972Elithorn & Barnett, 1967) have shown that performance on a reaction time (RT) task may be facilitated by projecting component stimuli of the task to different, rather than same, sides of the visual field. Dimond (1970), for example, presented arrow shapes to the left, right, or both sides of the visual field. Subjects were instructed to respond with the hand indicated by the arrow. On some trials, two arrows were presented simultaneously, one pointing in each direction, and a double response was required. On these trials, the two arrows were presented in either the left or the right visual field, or were divided so that one arrow appeared on each side of the visual field. The results of this experiment were striking. When a double response was required, RT was some 95 msec shorter when the arrows were divided between the two sides of the visual field. Dimond attributed this finding to the distribution of the burden of perceptual processing between the cerebral hemispheres. He argued that the arrival of stimuli in separate hemispheres, via opposite sides of the visual field, permits simultaneous analysis and encoding to occur in the two perceptual systems, thus reducing the overall time ordinarily required for such operations. In commenting on this explanation, he noted that if each hemisphere shared stimulus information with the other immediately upon receiving it, one would not expect the projection of stimuli to same or separate visual fields to have any differential effect upon performance.This implies that when stimuli are projected to both sides of the visual field, the two hemispheres are able to

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Right hemispheric dominance for mediating cerebral activation

Cited by 343 publications

References 14 publications

Effective Connectivity Reveals Right-Hemisphere Dominance in Audiospatial Perception: Implications for Models of Spatial Neglect

Effective Connectivity Reveals Right-Hemisphere Dominance in Audiospatial Perception: Implications for Models of Spatial Neglect

Adult developmental trajectories of pseudoneglect in the tactile, visual and auditory modalities and the influence of starting position and stimulus length

Dual hemispheric processing in a letter matching task

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