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
poster
unilateral spatial neglect, neglect dyslexia, optokinetic stimulation
English
Scientific Meeting of the ESN Federation of European Societies of Neuropsychology - September 12-14
2013
2013
7
581
none
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].
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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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