The Character-line Bisection Task: a new test for hemispatial neglect

Lee, B.H.; Kang, Sohi; Park, J.M.; Son, Younggon; Lee, K.H.; Adair, John C.; Heilman, Kenneth M.; Na, D.L.

doi:10.1016/j.neuropsychologia.2004.02.015

Cited by 57 publications

(54 citation statements)

References 29 publications

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“…The tests included: line bisection, cancellation, and figure copying. These tests have been previously demonstrated to be reliable and valid [17]. Of the 28 patients, 13 patients had upper limb dysmetria (left Anatomical nomenclature for hemisphere lobule according to Schmahmann et al [23].…”

Section: Apparatus-proceduresmentioning

confidence: 99%

“…Of the 28 patients, 13 patients had upper limb dysmetria (left Anatomical nomenclature for hemisphere lobule according to Schmahmann et al [23]. § Neglect was defined when the neglect score exceeded 4.444 or was less than −2.288 according to the norm previously described [17]. Case 22 performed only the line bisection task and the presence of neglect was defined by the line bisection subtest score (normal range: −1.188-1.205).…”

Section: Apparatus-proceduresmentioning

confidence: 99%

“…Each subject bisected 10 solid-lines, 10 Letter-lines, and 10 Star-lines. Details of CLBT and their method of administration have been described previously [17]. The cancellation tasks consisted of a modified version of Albert's line cancellation test [18] and the Star Cancellation Task [19].…”

Section: Apparatus-proceduresmentioning

confidence: 99%

“…There were two figure copying tasks: a modified Ogden Scene Test [20] and the Two Daisy Figure [21]. The scoring system of all tests also has been described [17]. Briefly, each score from three bisection and two cancellation tasks was converted to a 10 point scale and ranged from −10 to 10 with the plus and minus values representing leftward and rightward bias, respectively.…”

Section: Apparatus-proceduresmentioning

confidence: 99%

“…Positive score denoted the rightward bias and negative leftward bias. As has been published previously [17], norms for this neglect battery were based on 81 normal subjects without previous history of neurological or psychiatric illness (40 men and 41 women with a mean age of 58.3 ± 11.2 years). Therefore, in right cerebellar stroke, CN was defined as a total score that exceeds +2SD of controls' total score and IN as a total score that was less than −2SD of the controls' total score.…”

Section: Apparatus-proceduresmentioning

confidence: 99%

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Hemispatial neglect in cerebellar stroke

Kim

Choi

Han

et al. 2008

Journal of the Neurological Sciences

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Section: Apparatus-proceduresmentioning

confidence: 99%

Section: Apparatus-proceduresmentioning

confidence: 99%

Section: Apparatus-proceduresmentioning

confidence: 99%

Section: Apparatus-proceduresmentioning

confidence: 99%

Section: Apparatus-proceduresmentioning

confidence: 99%

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Hemispatial neglect in cerebellar stroke

Kim

Choi

Han

et al. 2008

Journal of the Neurological Sciences

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Line bisection by eye and by hand reveal opposite biases

2013

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The vision-for-action literature favours the idea that the motor output of an action-whether manual or oculomotor-leads to similar results regarding object handling. Findings on line bisection performance challenge this idea: healthy individuals bisect lines manually to the left of centre and to the right of centre when using eye fixation. In case that these opposite biases for manual and oculomotor action reflect more universal compensatory mechanisms that cancel each other out to enhance overall accuracy, one would like to observe comparable opposite biases for other material. In the present study, we report on three independent experiments in which we tested line bisection (by hand, by eye fixation) not only for solid lines, but also for letter lines; the latter, when bisected manually, is known to result in a rightward bias. Accordingly, we expected a leftward bias for letter lines when bisected via eye fixation. Analysis of bisection biases provided evidence for this idea: manual bisection was more rightward for letter as compared to solid lines, while bisection by eye fixation was more leftward for letter as compared to solid lines. Support for the eye fixation observation was particularly obvious in two of the three studies, for which comparability between eye and hand action was increasingly adjusted (paper-pencil versus touch screen for manual action). These findings question the assumption that ocular motor and manual output are always inter-changeable, but rather suggest that at least for some situations ocular motor and manual output biases are orthogonal to each other, possibly balancing each other out.

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Line and word bisection in right-brain-damaged patients with left spatial neglect

et al. 2013

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Right-brain-damaged patients with left unilateral spatial neglect typically set the mid-point of horizontal lines to the right of the objective center. By contrast, healthy participants exhibit a reversed bias (pseudoneglect). The same effect has been described also when bisecting orthographic strings. In particular, for this latter kind of stimulus, some recent studies have shown that visuo-perceptual characteristics, like stimulus length, may contribute to both the magnitude and the direction bias of the bisection performance (Arduino et al. in Neuropsychologia 48:2140-2146, 2010). Furthermore, word stress was shown to modulate reading performances in both healthy participants, and patients with left spatial neglect and neglect dyslexia (Cubelli and Beschin in Brain Lang 95:319-326, 2005; Rusconi et al. in Neuropsychology 18:135-140, 2004). In Experiment I, 22 right-brain-damaged patients (11 with left visuo-spatial neglect) and 11 matched neurologically unimpaired control participants were asked to set the subjective mid-point of word letter strings, and of lines of comparable length. Most patients exhibited an overall disproportionate rightward bias, sensitive to stimulus length, and similar for words and lines. Importantly, in individual patients, biases differed according to stimulus type (words vs. lines), indicating that at least partly different mechanisms may be involved. In Experiment II, the putative effects on the bisection bias of ortho-phonological information (i.e., word stress endings), arising from the non-neglected right hand side of the stimulus were investigated. The orthographic cue induced a rightward shift of the perceived mid-point in both patients and controls, with short words stressed on the antepenultimate final sequence inducing a smaller rightward deviation with respect to short words stressed on the penultimate final sequence. In conclusion, partly different mechanisms, including both visuo-spatial and lexical factors, may support line and word bisection performance of right-brain-damaged patients with left spatial neglect, and healthy participants.

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The Character-line Bisection Task: a new test for hemispatial neglect

Cited by 57 publications

References 29 publications

Hemispatial neglect in cerebellar stroke

Hemispatial neglect in cerebellar stroke

Line bisection by eye and by hand reveal opposite biases

Line and word bisection in right-brain-damaged patients with left spatial neglect

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