Bisecting Lines with Different Tools in Right Brain Damaged Patients: The Role of Action Programming and Sensory Feedback in Modulating Spatial Remapping

Neppi-Mòdona, Marco; Rabuffetti, Marco; Folegatti, Alessia; Ricci, Raffaella; Spinazzola, Lucia; Schiavone, Francesca; Ferrarin, Maurizio; Berti, Anna

doi:10.1016/s0010-9452(08)70465-9

Cited by 43 publications

(28 citation statements)

References 26 publications

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“…It appeared likely that the stick determined an extension of body representation, including in the peripersonal space all the space reachable by the tool so remapping far as near space. These data, together with more recent findings by NeppiMòdona et al [28], suggest that space representations can be recoded when tools change the spatial relation between the agent's body and the target object.…”

Section: Introductionsupporting

confidence: 58%

Far Space Remapping by Tool Use: A rTMS Study Over the Right Posterior Parietal Cortex

Giglia¹,

Pia²,

Folegatti³

et al. 2015

Brain Stimulation

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Section: Introductionsupporting

confidence: 58%

Far Space Remapping by Tool Use: A rTMS Study Over the Right Posterior Parietal Cortex

Giglia¹,

Pia²,

Folegatti³

et al. 2015

Brain Stimulation

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“…In far space the target line was located 3 m from the patient’s feet and the patient bisected the line by means of a laser pointer. The two conditions reaching in near space and pointing in far space were considered the “baseline” conditions to reveal the presence of dissociations between neglect in near and in far space (see Berti and Frassinetti, 2000; Pegna et al, 2001; Neppi-Mòdona et al, 2007). When using a stick to bisect a segment located in near space or a laser pointer to bisect a segment located in far space, patients do not remap near space into far space or far space into near space, respectively; instead, when using a laser pointer to bisect a segment located in near space, an object-dependent far space representation can be activated (a laser pointer is often associated to actions carried out in far space); similarly, when using a stick to bisect a segment located in fare space, a near space representation can be activated (the stick activates a near space representation because the far object, once reached with the stick, is automatically recoded as being located in proximal space as a consequence of tool use).…”

Section: Methodsmentioning

confidence: 99%

“…In addition, near and far space representations were found to be dynamic, rather than static. Neurophysiological (Iriki et al, 1996) and neuropsychological studies (Berti and Frassinetti, 2000; Berti et al, 2002; Neppi-Mòdona et al, 2007) have shown that far space can me remapped as near, and near space as far, depending on the tool/action used by the patient to reach objects located in near and far space, respectively. Furthermore, among the functions that can be impaired in neglect there is walking, with patients showing a lateral deviation of the walking trajectory.…”

Section: Introductionmentioning

confidence: 99%

Long-Lasting Amelioration of Walking Trajectory in Neglect after Prismatic Adaptation

Rabuffetti¹,

Folegatti²,

Spinazzola³

et al. 2013

Front. Hum. Neurosci.

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In the present study we explored the effect of prismatic adaptation (PA) applied to the upper right limb on the walking trajectory of a neglect patient with more severe neglect in far than in near space. The patient was asked to bisect a line fixed to the floor by walking across it before and after four sessions of PA distributed over a time frame of 67 days. Gait path was analyzed by means of an optoelectronic motion analysis system. The walking trajectory improved following PA and the result was maintained at follow-up, 15 months after treatment. The improvement was greater for the predicted bisection error (estimated on the basis of the trajectory extrapolated from the first walking step) than for the observed bisection error (measured at line bisection). These results show that PA may act on high level spatial representation of gait trajectory rather than on lower level sensory-motor gait components and suggest that PA may have a long-lasting rehabilitative effect on neglect patients showing a deviated walking trajectory.

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“…Conversely, the procedures aimed at finding dissociation between spatial frames of reference had not reached a standard procedure or yielded specific normative values for use in a clinical neuropsychological setting. One of these tests was the distal line bisection (dLB) in which the patient was required to bisect distal lines in extra-personal space using a laser pointer [8,13,14].…”

Section: Introductionmentioning

confidence: 99%

Normative data for distal line bisection and baking tray task

Facchin

Beschin²,

Pisano

et al. 2016

Neurol Sci

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Line bisection is one of the tests used to diagnose unilateral spatial neglect (USN). Despite its wide application, no procedure or norms were available for the distal variant when the task was performed at distance with a laser pointer. Furthermore, the baking tray task was an ecological test aimed at diagnosing USN in a more natural context. The aim of this study was to collect normative values for these two tests in an Italian population. We recruited a sample of 191 healthy subjects with ages ranging from 20 to 89 years. They performed line bisection with a laser pointer on three different line lengths (1, 1.5, and 2 m) at a distance of 3 m. After this task, the subjects performed the baking tray task and a second repetition of line bisection to test the reliability of measurement. Multiple regression analysis revealed no significant effects of demographic variables on the performance of both tests. Normative cut-off values for the two tests were developed using non-parametric tolerance intervals. The results formed the basis for clinical use of these two tools for assessing lateralized performance of patients with brain injury and for diagnosing USN.

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Bisecting Lines with Different Tools in Right Brain Damaged Patients: The Role of Action Programming and Sensory Feedback in Modulating Spatial Remapping

Cited by 43 publications

References 26 publications

Far Space Remapping by Tool Use: A rTMS Study Over the Right Posterior Parietal Cortex

Far Space Remapping by Tool Use: A rTMS Study Over the Right Posterior Parietal Cortex

Long-Lasting Amelioration of Walking Trajectory in Neglect after Prismatic Adaptation

Normative data for distal line bisection and baking tray task

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