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. © 2013 Daini, Albonico, Malaspina, Martelli, Primativo and Arduino

Daini, R., Albonico, A., Malaspina, M., Martelli, M., Primativo, S., & Arduino, L. (2013). Dissociation in optokinetic stimulation sensitivity between omission and substitution reading errors in neglect dyslexia. FRONTIERS IN HUMAN NEUROSCIENCE, 7(581), 1-10 [10.3389/fnhum.2013.00581].

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

DAINI, ROBERTA;ALBONICO, ANDREA;MALASPINA, MANUELA;
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. © 2013 Daini, Albonico, Malaspina, Martelli, Primativo and Arduino
Articolo in rivista - Articolo scientifico
Eye movements; Neglect dyslexia; Neuropsychological rehabilitation; Optokinetic stimulation; Unilateral spatial neglect
English
1
10
10
Daini, R., Albonico, A., Malaspina, M., Martelli, M., Primativo, S., & Arduino, L. (2013). Dissociation in optokinetic stimulation sensitivity between omission and substitution reading errors in neglect dyslexia. FRONTIERS IN HUMAN NEUROSCIENCE, 7(581), 1-10 [10.3389/fnhum.2013.00581].
Daini, R; Albonico, A; Malaspina, M; Martelli, M; Primativo, S; Arduino, L
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/46722
Citazioni
  • Scopus 9
  • ???jsp.display-item.citation.isi??? 8
Social impact