The effects of adaptation to prisms displacing rightwards the field of vision on omission errors, and on perseveration and other graphic productions in a line cancellation task, were assessed in nine right-brain-damaged patients with left unilateral spatial neglect. Prism adaptation improved both neglect, as indexed by omission errors, and perseveration behaviour, up to a delay of 60 min. No correlation was found between omission and perseveration errors in all assessments. The suggestion is made that perseveration and other complex graphic productions made by right brain-damaged-patients with left spatial unilateral neglect is due to a defective monitoring of complex motor behaviour, frequently associated to cerebral damage involving the right frontal lobe. Interpretations of perseveration behaviour in terms of allochiria and directional hypokinesia are considered, and their limits discussed.

Vallar, G., Zilli, T., Gandola, M., & Bottini, G. (2006). Productive and defective impairments in the neglect syndrome: Graphic perseveration, drawing productions and optic prism exposure. CORTEX, 42(6), 911-920 [10.1016/S0010-9452(08)70435-0].

Productive and defective impairments in the neglect syndrome: Graphic perseveration, drawing productions and optic prism exposure

VALLAR, GIUSEPPE;
2006

Abstract

The effects of adaptation to prisms displacing rightwards the field of vision on omission errors, and on perseveration and other graphic productions in a line cancellation task, were assessed in nine right-brain-damaged patients with left unilateral spatial neglect. Prism adaptation improved both neglect, as indexed by omission errors, and perseveration behaviour, up to a delay of 60 min. No correlation was found between omission and perseveration errors in all assessments. The suggestion is made that perseveration and other complex graphic productions made by right brain-damaged-patients with left spatial unilateral neglect is due to a defective monitoring of complex motor behaviour, frequently associated to cerebral damage involving the right frontal lobe. Interpretations of perseveration behaviour in terms of allochiria and directional hypokinesia are considered, and their limits discussed.
Articolo in rivista - Articolo scientifico
spatial working-memory; right-hemisphere stroke; unilateral neglect; visual neglect; directional hypokinesia; visuospatial neglect; hemispatial neglect; motor perseveration; stimuli; cancellation
English
911
920
Vallar, G., Zilli, T., Gandola, M., & Bottini, G. (2006). Productive and defective impairments in the neglect syndrome: Graphic perseveration, drawing productions and optic prism exposure. CORTEX, 42(6), 911-920 [10.1016/S0010-9452(08)70435-0].
Vallar, G; Zilli, T; Gandola, M; Bottini, G
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/3608
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