The spatial encoding of body parts in patients with neglect and neurologically unimpaired participants

被引:31
作者
Sposito, Ambra V. [1 ]
Bolognini, Nadia [1 ,2 ]
Vallar, Giuseppe [1 ,2 ]
Posteraro, Lucio [3 ]
Maravita, Angelo [1 ]
机构
[1] Univ Milano Bicocca, Dipartimento Psicol, I-20126 Milan, Italy
[2] IRCCS Ist Auxol Italiano, Neuropsychol Lab, Milan, Italy
[3] Osped Suzzara SpA MN, Milan, Italy
关键词
Spatial impairments; Space coding; Body representation; Multisensory integration; Unilateral spatial neglect; LINE BISECTION; REPRESENTATION; PSEUDONEGLECT; PERFORMANCE; ANOSOGNOSIA; HEMIPLEGIA; ANATOMY; MOTOR; TOUCH;
D O I
10.1016/j.neuropsychologia.2009.09.026
中图分类号
B84 [心理学]; C [社会科学总论]; Q98 [人类学];
学科分类号
03 ; 0303 ; 030303 ; 04 ; 0402 ;
摘要
Body parts are represented in the brain in a very specific fashion, as compared to other three-dimensional objects, with reference to their prototypic shape and multisensory coding. However, evidence is lacking about the spatial representation of body parts. To address this issue, in Experiment I we first compared the metric representation of body parts and of non-bodily objects in 14 right-brain-damaged patients with left unilateral spatial neglect (USN), and in 14 neurologically unimpaired control participants. Participants bisected, by manual pointing, a three-dimensional object, or their own left forearm. Patients showed the well-known ipsilesional rightward displacement of the subjective midpoint, in both forearm and solid bisection. Both USN patients and control participants were overall more accurate in the bisection of their own forearm, relative to the extracorporeal object. in four patients this advantage of the forearm was significant in a single-case analysis, while two patients showed the opposite dissociation, being more accurate with the solid object. In Experiment 2 neurologically unimpaired participants were more accurate in the bisection of a fake forearm, as well as of their own forearm, as compared to the extrapersonal object. Overall, the results indicate that the representation of the metric of the body is more reliable than that of extrapersonal objects, and also more resistant to the disruption of spatial representations brought about by USN, possibly due to the prototypical shape of body parts. Furthermore, the double dissociation found in USN patients suggests that the metrics of body parts and of extrapersonal objects are supported by independent spatial processes. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码:334 / 340
页数:7
相关论文
共 43 条
[1]   Frames of reference for mapping tactile stimuli in brain-damaged patients [J].
Aglioti, S ;
Smania, N ;
Peru, A .
JOURNAL OF COGNITIVE NEUROSCIENCE, 1999, 11 (01) :67-79
[2]   SIMPLE TEST OF VISUAL NEGLECT [J].
ALBERT, ML .
NEUROLOGY, 1973, 23 (06) :658-664
[3]   The body in the brain: neural bases of corporeal awareness [J].
Berlucchi, G ;
Aglioti, S .
TRENDS IN NEUROSCIENCES, 1997, 20 (12) :560-564
[4]   Shared cortical anatomy for motor, awareness and motor control [J].
Berti, A ;
Bottini, G ;
Gandola, M ;
Pia, L ;
Smania, N ;
Stracciari, A ;
Castiglioni, I ;
Vallar, G ;
Paulesu, E .
SCIENCE, 2005, 309 (5733) :488-491
[5]   UNILATERAL NEGLECT - PERSONAL AND EXTRA-PERSONAL [J].
BISIACH, E ;
PERANI, D ;
VALLAR, G ;
BERTI, A .
NEUROPSYCHOLOGIA, 1986, 24 (06) :759-767
[6]  
Bisiach E, 1983, Brain Cogn, V2, P32, DOI 10.1016/0278-2626(83)90027-1
[7]   UNAWARENESS OF DISEASE FOLLOWING LESIONS OF THE RIGHT-HEMISPHERE - ANOSOGNOSIA FOR HEMIPLEGIA AND ANOSOGNOSIA FOR HEMIANOPIA [J].
BISIACH, E ;
VALLAR, G ;
PERANI, D ;
PAPAGNO, C ;
BERTI, A .
NEUROPSYCHOLOGIA, 1986, 24 (04) :471-482
[8]  
Bisiach E., 2000, HDB NEUROPSYCHOLOGY, P459
[9]   Rubber hands 'feel' touch that eyes see [J].
Botvinick, M ;
Cohen, J .
NATURE, 1998, 391 (6669) :756-756
[10]   PSEUDONEGLECT - EFFECTS OF HEMISPACE ON A TACTILE LINE BISECTION TASK [J].
BOWERS, D ;
HEILMAN, KM .
NEUROPSYCHOLOGIA, 1980, 18 (4-5) :491-498