Although omission and substitution errors in neglect dyslexia (ND) patients have always been considered as different manifestations of the same acquired reading disorder, recently, we proposed a new dual mechanism model. While omissions are related to the exploratory disorder which characterizes unilateral spatial neglect (USN), substitutions are due to a perceptual integration mechanism. A consequence of this hypothesis is that specific training for omission-type ND patients would aim at restoring the oculo-motor scanning and should not improve reading in substitution-type ND. With this aim we administered an optokinetic stimulation (OKS) to two brain-damaged patients with both USN and ND, MA and EP, who showed ND mainly characterized by omissions and substitutions, respectively. MA also showed an impairment in oculo-motor behavior with a non-reading task, while EP did not. The two patients presented a dissociation with respect to their sensitivity to OKS, so that, as expected, MA was positively affected, while EP was not. Our results confirm a dissociation between the two mechanisms underlying omission and substitution reading errors in ND patients. Moreover, they suggest that such a dissociation could possibly be extended to the effectiveness of rehabilitative procedures, and that patients who mainly omit contralesional-sided letters would benefit from OKS

Arduino, L., Albonico, A., Malaspina, M., Martelli, M., Primativo, S., & Daini, R. (2013). Dissociation in optokinetic stimulation sensitivity between omission and substitution reading errors in neglect dyslexia. Intervento presentato a: Scientific Meeting of the ESN Federation of European Societies of Neuropsychology - September 12-14, Berlin, Germany [10.3389/fnhum.2013.00581].

Dissociation in optokinetic stimulation sensitivity between omission and substitution reading errors in neglect dyslexia

ALBONICO, ANDREA
Secondo
;
MALASPINA, MANUELA;DAINI, ROBERTA
Ultimo
2013

Abstract

Although omission and substitution errors in neglect dyslexia (ND) patients have always been considered as different manifestations of the same acquired reading disorder, recently, we proposed a new dual mechanism model. While omissions are related to the exploratory disorder which characterizes unilateral spatial neglect (USN), substitutions are due to a perceptual integration mechanism. A consequence of this hypothesis is that specific training for omission-type ND patients would aim at restoring the oculo-motor scanning and should not improve reading in substitution-type ND. With this aim we administered an optokinetic stimulation (OKS) to two brain-damaged patients with both USN and ND, MA and EP, who showed ND mainly characterized by omissions and substitutions, respectively. MA also showed an impairment in oculo-motor behavior with a non-reading task, while EP did not. The two patients presented a dissociation with respect to their sensitivity to OKS, so that, as expected, MA was positively affected, while EP was not. Our results confirm a dissociation between the two mechanisms underlying omission and substitution reading errors in ND patients. Moreover, they suggest that such a dissociation could possibly be extended to the effectiveness of rehabilitative procedures, and that patients who mainly omit contralesional-sided letters would benefit from OKS
No
poster
Scientifica
unilateral spatial neglect, neglect dyslexia, optokinetic stimulation
English
Scientific Meeting of the ESN Federation of European Societies of Neuropsychology - September 12-14
Arduino, L., Albonico, A., Malaspina, M., Martelli, M., Primativo, S., & Daini, R. (2013). Dissociation in optokinetic stimulation sensitivity between omission and substitution reading errors in neglect dyslexia. Intervento presentato a: Scientific Meeting of the ESN Federation of European Societies of Neuropsychology - September 12-14, Berlin, Germany [10.3389/fnhum.2013.00581].
Arduino, L; Albonico, A; Malaspina, M; Martelli, M; Primativo, S; Daini, R
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/75050
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