Unformatted text preview: s a m e a n a t o m i c a l s ite, m echanical m uscle v ibration w ith t ranscutan eous e lectrical s timulation, w hich activates a fferent
n erve fibres r ather u nselectively a nd leads t o n o k inaest hetic i llusions as seen w ith vibration 9 IV B efore D 15 KOverla p et al., 1991
800 ms • Neglect
Fixation p oin t
"-"-:: : :"",",""i
', 2200 ms
Ey e m ovemen t
FIG . 1.
an he temporal s
are vibratedThe 5 differenct entralcfonditionspoindt rtemained visiblequencnethef pixation ploint andappearet don
in the examination. The
~ - , 9 9 , ' ." Materials and methods , , . . . . ' ~ / , . / ' , ' . <. ,r - " . " - x ~ # 'r " I' ~ , 2 9 ;4, ./ . "'~ .
SRT = saccadic reaction. "t.ime. The ,s.patial relation between the orientation of head and trunk midli
F our n eglect p atients w ere e xamined. fD emographic a nd cis illustrated as seen from above. The trunk is represented by a rectangle, the head
o the stimuli linical
d ata a re g iven i n T able 1. B rain l esions w ere d ocumented b y C T
= e xamination i ncluding
s cans a nd/or M RI. N europsychological target; X = fixation point ( FP) ; broken lines = head midline; Karnath,line = trunk midline. In
o S ubjects 9 c onfrontation t esting, c opying, l ine b isection, c ancellation a nd p ic- . o .. , . 9 t , , . J; '. . ~ , ~, ~ , ~ , j, ,= , 50 What is spatial neglect?
Neglect can be “cured” with prism adaptation.
• Prism adaptation (demo)
• Rossetti et al. (1998) used
prisms on neglect patients.
improved – a
• Neglect improvement due to somatosensory
recalibration of body schema? 51 Overview
! Behavioral consequences of attention
Selective attention and orienting
Attention and eye movements
Physiological effects of attention
How is attention directed?
Corbetta's DAN and VAN
What is neglect?
Body schema and awareness
! Conceptualization of body schema
! Body schema is necessary for sensorimotor
! Out of body
! What this has to do with consciousness. 52 Body schema: Conceptualization
• Coslett et al. (20...
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- Winter '12
- Parietal lobe, Corbetta