Upper limb movement differentiation according to taxonomic semantic category

Bennett, K. M. B.; Thomas, Joyce; Jervis, Caroline; Castiello, Umberto

doi:10.1097/00001756-199801260-00015

Cited by 7 publications

(4 citation statements)

References 21 publications

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“…In addition, the difference between pointing at objects vs. pointing at body parts in this study was reflected in a difference in reaction times. Despite the role of the semantic category, such results were not observed in Bennett et al (1998). This is presumably because the authors recorded their reaction times from an auditory signal following the target display, whereas we recorded reaction times from the identification of the target to the button release.…”

Section: Discussionmentioning

confidence: 79%

“…This might explain why previous studies of healthy participants' movement performance using figurative targets obtained a reverse effect. Indeed, when participants were asked to reach-to-grasp and pair together pictures of either living or non-living things, movements were faster for pairing together the pictures of living things (Bennett et al, 1998). Likewise, healthy volunteers showed shorter RTs for localizing with a track-ball human body parts depicted on realistic videos compared to drawings (Felician et al, 2009).…”

Section: The Specificity Of Another Person's Body As a Pointed Targetmentioning

confidence: 99%

“…These results obtained in healthy participants do not fit with the behaviour of patients with heterotopagnosia who easily point at objects or figurative representations of the body. However the above experiments (Bennett et al, 1998;Felician et al, 2009) not only used figurative representations, and not real persons, but also involved a non-communicative set-up. Therefore, the discrepancy between our study and previous ones might not rely only on the specificity of the real human body as a target, but also on the communicative set-up of pointing.…”

Section: The Specificity Of Another Person's Body As a Pointed Targetmentioning

confidence: 99%

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Viewing another person's body as a target object: A behavioural and PET study of pointing

et al. 2012

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Humans usually point at objects to communicate with other persons, although they generally avoid pointing at the other's body. Moreover, patients with heterotopagnosia after left parietal damage cannot point at another person's body parts, although they can point at objects and at their own body parts and although they can grasp the others' body parts. Strikingly, their performance gradually improves for figurative human body targets. Altogether, this suggests that the body of another real person holds a specific status in communicative pointing. Here, we test in healthy individuals whether performance for communicative pointing is influenced by the communicative capacity of the target. In Experiment 1, pointing at another real person's body parts was compared to pointing at objects, and in Experiment 2, the person was replaced by a manikin. While reaction times for pointing at objects were shorter compared to pointing at other person's body parts, they were similar for objects and manikin body parts. By adapting Experiment 1 to PET-scan imaging (Experiment 3), we showed that, compared to pointing at objects, the brain network for pointing at other person's body parts involves the left posterior intraparietal sulcus, lesion of which could cause heterotopagnosia. Taken together, our results indicate that the specificity of pointing at another person's body goes beyond the visuo-spatial features of the human body and might rather rely on its communicative capacity.

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Section: Discussionmentioning

confidence: 79%

Section: The Specificity Of Another Person's Body As a Pointed Targetmentioning

confidence: 99%

Section: The Specificity Of Another Person's Body As a Pointed Targetmentioning

confidence: 99%

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Viewing another person's body as a target object: A behavioural and PET study of pointing

et al. 2012

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“…The development of ischemic white matter lesions under chronic hypoperfusion induces cognitive impairment through oxditive stress and inflammatory reaction [34,35]. BCCAO rats is a well-characterized model of cerebral microvascular changes and cognitive dysfunction by chronic cerebral hypoperfusion [36][37][38]. Decreased blood flow in rats of bilateral permanent occlusion of the common carotid arteries causes ultrastructural aberrations of capillaries and cognitive impairments [30,37,39].…”

Section: Discussionmentioning

confidence: 99%

Upregulation of BACE1 and β-Amyloid Protein Mediated by Chronic Cerebral Hypoperfusion Contributes to Cognitive Impairment and Pathogenesis of Alzheimer’s Disease

et al. 2009

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Chronic cerebral hypoperfusion (CCH) increases the risk of Alzheimer disease (AD) through several biologically plausible pathways, but the relationship between CCH and the development of AD remains uncertain. To investigate expression of APP, BACE1 and A beta in the hippocampus of BCCAO rats and study pathophysiological mechanism of AD from CCH. CCH rat model was established by chronic bilateral common carotid artery occlusion (BCCAO). Behavior was evaluated after BCCAO with Morris water maze and open-field task. Expression of A beta was measured by enzyme linked immunosorbent assay (ELISA). beta-Amyloid precursor protein cleavage enzyme 1 (BACE1) and beta-amyloid precursor protein (APP) were tested by ELISA, Western blotting and RT-PCR. Cognitive impairment occurred with CCH by Morris water maze test and open-field task. The BACE1 and A beta level in BCCAO rats was more increased than sham-operation control rats (P < 0.01) but APP had no difference(P > 0.05). The expression of BACE1 and A beta has no inter-group difference in BCCAO rats (P > 0.05). The level of BACE1 and A beta had positive correlation with cognitive impairment (P < 0.01) while no correlation was observed between APP and cognitive impairment. Chronic cerebral ischemia contributes to cognitive impairment and vascular pathogenesis of Alzheimer's disease that chronic cerebral hypoperfusion increases BACE1 and A beta level in brain.

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Modulation of reach-to-grasp parameters: semantic category, volumetric properties and distractor interference?

Kritikos

Dunai

Castiello

2001

Experimental Brain Research

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In the two experiments of this study, we assessed the influence of target size and semantic category on the expression of reach-to-grasp kinematic parameters. Moreover, we investigated the influence of size and semantic category of distractors on reaches to the target. The experimental objects represented living and non-living categories and wide and narrow grasp sizes. Participants reached for and picked up mid-sagittally placed targets, which were either alone or flanked by distractors congruent or incongruent to semantic category and size of the target. In experiment 1, movement duration was faster to living objects. We could not replicate this, however, in experiment 2. Conversely, significant and reliable Category x Size interactions for grasp were obtained in experiment 1 and replicated in experiment 2. The pattern of the means in these interactions coincided with the absolute volumetric properties of the stimuli, indicating that the size of the stimuli was the main determinant of the expression of kinematic parameters. We conclude that volumetric properties such as size, rather than semantic category, are the crucial features in the programming and execution of movement to targets. As regards the category and size of the distractor, interference effects were evident: both category and size exerted a comparable influence on reaches to the target. The direction of interference, however, was not systematic. The interference effects are discussed in the context of visual search models of attention.

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Upper limb movement differentiation according to taxonomic semantic category

Cited by 7 publications

References 21 publications

Viewing another person's body as a target object: A behavioural and PET study of pointing

Viewing another person's body as a target object: A behavioural and PET study of pointing

Upregulation of BACE1 and β-Amyloid Protein Mediated by Chronic Cerebral Hypoperfusion Contributes to Cognitive Impairment and Pathogenesis of Alzheimer’s Disease

Modulation of reach-to-grasp parameters: semantic category, volumetric properties and distractor interference?

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