H Chris Dijkerman

..This would presumably involve ventral stream processing, which is disrupted in the visual agnosic patients...

..Patients with known abnormalities to the remaining brain structures performed inferior on the tapping test only. No effect was found of the hemispheric side of removal...

..We suggest the posterior parietal cortex subserves both perception and action, whereas the insula principally subserves perceptual recognition and learning...

..This illusion-sensitive motor response challenges one of the foundations on which the dichotomy is based, and addresses the importance of illusion induction versus type of response when investigating body representations...

..These perimetrical results suggest that compensatory eye movements are an unlikely candidate for an underlying mechanism...

..The reverse pattern was observed in the other patient. This finding provides further support for separate processing for body image and body scheme...

..We suggest that the larger grip aperture when grasping objects on the arm were due to an increase in safety margin as a response to greater uncertainty about the object dimensions due to reduced receptor density...

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..These findings further underpin the idea of a selective impaired higher order body representation restricted to the fingers as underlying cause of finger agnosia...

..Finally, we present two examples of behavioural bodily illusion experiments and apply Bayesian model selection to illustrate how this different approach of dissociating and classifying multiple body representations can be applied...

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..B. to achieve perceptual access to visual information processed in the dorsal stream: information that is normally only available for on-line visuomotor control...

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..We suggest that prism adaptation may ameliorate neglect by improving compensatory processes of leftward voluntary orienting, rather than by a fundamental change in attentional bias...

..In contrast, the dorsolateral stream appears to adapt motor behavior to the current conditions by integrating perceptual information processed in the ventral stream into the prehension plan...

..In conclusion, these findings suggest that the effect of the kinaesthetic illusion on reaching and matching differed, consistent with the idea of separate underlying body representations for both responses...

..These data support the idea that visual targets for reaching movements are coded in eye-centred coordinates within the posterior parietal cortex...

..Brain and space (pp. 461-481); Paillard, J. (1999). Body schema and body image: A double dissociation in deafferented patients. In G. N. Gantchev, S. Mori, & J.Massion (Eds.), Motor control, today and tomorrow (pp. 197-214)]...

..The present study was intended to examine the relationship between clinical pain experience and neuropsychological status in residents of homes for the elderly...

..These results suggest that observation of grasping movements can interfere with the on-line control of prehension movements and provides further evidence for overlapping networks for grasping observation and execution...

..This suggests that the localization of stimuli in a somatotopic reference and the integration of this representation with postural information are two separate processes that apply differently to the hands and fingers...

..Furthermore, as learned object knowledge becomes available, aIPS comes to strongly depend on this prior information for structuring the motor plan...

..The results provide evidence for the interpretation that non-targets influence the movement trajectory partly because they are 'obstructing'...

..Together, these results provide the first evidence of a behavioural effect of a tactile imagery assignment on the perception of real tactile stimuli...

..Incomplete leftward scanning may perhaps be sufficient to induce perceptual size distortion, but it is not a necessary prerequisite...

..The relation between mental processes such as attentional and perceived personal control over recovery, and motor imagery was additionally investigated...

..The current findings suggest that prism adaptation can have a non-spatial effect on neglect-related supra-modal deficits...

..This was true for all bar two of the patients, who showed clear neglect in both tasks. We conclude that the visuomotor processing underlying obstacle avoidance during reaching is preserved in most patients with left visual neglect...

..We further found that when a 'preview' task was used in which the patients could use memorized information to guide a response to a still-present target object, they did so in preference to using the visual information facing them...

..These findings confirm that posterior parietal lesions severely disrupt direct visuomotor transformations, and suggest that the residual performance is mediated indirectly by expectations or beliefs about target position...

..However, randomised controlled trials are lacking and no data are available on the effectiveness of prism adaptation in the treatment of acute neglect...

..Multiple single-case studies will, however, be required to establish whether this association of deficits is typical, or whether visual and tactile size distortions are separable symptoms associated with neglect...