Title of article :
Canceling out both the real and the spectral lines
Author/Authors :
Toraldo، نويسنده , , Alessio and Gandola، نويسنده , , Martina and Loffredo، نويسنده , , Simona and Rancati، نويسنده , , Anna and Zanardi، نويسنده , , Gabriele and Bottini، نويسنده , , Gabriella، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2005
Pages :
10
From page :
226
To page :
235
Abstract :
Neglect patients typically show motor perseveration while canceling targets on the ipsilesional side. This behavior can be influenced by the presence vs. absence of targets on the (neglected) contralesional side (Bottini & Toraldo, 2003). As alternative explanations, the authors proposed (i) directional hypokinesia—the patient cannot perform reaching movements towards detected left-sided targets, and thus carries on canceling on the right side, and (ii) allochiria—the patient misperceives left-sided targets as located on the right side, and cancels them there. We report here data from a patient (EZ) that might confirm the second hypothesis. EZ was presented with 19 displays in which the number and position of cancellation targets on both sides were varied systematically. EZ showed motor perseveration while canceling, but this tendency did not vary across conditions. Interestingly though, EZ also drew cancellation marks in the empty space between the ipsilesional targets, and this phenomenon was significantly more intense when there were more targets on the neglected side. As EZ’s comments suggested, such a behavior might reflect the attempt to cancel out delusional targets. Our speculation is that those objects were generated by allochiria.
Keywords :
Allochiria , Spatial processing , Directional hypokinesia , Spatial neglect , Perseveration
Journal title :
Brain and Cognition
Serial Year :
2005
Journal title :
Brain and Cognition
Record number :
2248995
Link To Document :
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