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Differential contribution of right and left temporo-occipital and anterior temporal lesions to face recognition disorders.

Gainotti G, Marra C - Front Hum Neurosci (2011)

Bottom Line: Results of our review seem to confirm these suggestions.Furthermore, face recognition defects resulting from right anterior temporal lesions can usually be considered as part of a multimodal people recognition disorder.The implications of our review are, therefore, the following: (1) to consider the components of visual agnosia often observed in prosopagnosic patients with bilateral TO lesions as part of a semantic defect, resulting from left-sided lesions (and not from prosopagnosia proper); (2) to systematically investigate voice recognition disorders in patients with right anterior temporal lesions to determine whether the face recognition defect should be considered a form of "associative prosopagnosia" or a form of the "multimodal people recognition disorder."

View Article: PubMed Central - PubMed

Affiliation: Department of Neuroscience, Neuropsychology Service, Università Cattolica di Roma Rome, Italy.

ABSTRACT
In the study of prosopagnosia, several issues (such as the specific or non-specific manifestations of prosopagnosia, the unitary or non-unitary nature of this syndrome and the mechanisms underlying face recognition disorders) are still controversial. Two main sources of variance partially accounting for these controversies could be the qualitative differences between the face recognition disorders observed in patients with prevalent lesions of the right or left hemisphere and in those with lesions encroaching upon the temporo-occipital (TO) or the (right) anterior temporal cortex. Results of our review seem to confirm these suggestions. Indeed, they show that (a) the most specific forms of prosopagnosia are due to lesions of a right posterior network including the occipital face area and the fusiform face area, whereas (b) the face identification defects observed in patients with left TO lesions seem due to a semantic defect impeding access to person-specific semantic information from the visual modality. Furthermore, face recognition defects resulting from right anterior temporal lesions can usually be considered as part of a multimodal people recognition disorder. The implications of our review are, therefore, the following: (1) to consider the components of visual agnosia often observed in prosopagnosic patients with bilateral TO lesions as part of a semantic defect, resulting from left-sided lesions (and not from prosopagnosia proper); (2) to systematically investigate voice recognition disorders in patients with right anterior temporal lesions to determine whether the face recognition defect should be considered a form of "associative prosopagnosia" or a form of the "multimodal people recognition disorder."

No MeSH data available.


Related in: MedlinePlus

Critical areas of the right and left, temporal and occipital lobes that could play a critical role in different varieties of prosopagnosia and of multimodal people recognition disorders.
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Figure 1: Critical areas of the right and left, temporal and occipital lobes that could play a critical role in different varieties of prosopagnosia and of multimodal people recognition disorders.

Mentions: The main results of this review concern, on one hand, the qualitative differences between defects of visual recognition observed in patients with lesions involving the ventral TO structures of the right and left hemisphere and, on the other hand, the distinction between “prosopagnosia” and “multimodal people recognition disorders.” This second point of our review has led us to take into account aspects of familiar people recognition (such as the voice or the name) that clearly exceed the specific issue of prosopagnosia. This was made with two aims in mind: (a) to place the discussion of prosopagnosia in the more general context of familiar people recognition disorders; (b) to stress the need of investigating the other modalities of people recognition before considering a patients with face recognition disorders as an instance of prosopagnosia. In order to clarify the various parts of this discussion, we have reported in Figure 1 the critical areas of the right and left temporal and occipital lobes that could play a critical role in different varieties of prosopagnosia and of multimodal familiar people recognition disorders:


Differential contribution of right and left temporo-occipital and anterior temporal lesions to face recognition disorders.

Gainotti G, Marra C - Front Hum Neurosci (2011)

Critical areas of the right and left, temporal and occipital lobes that could play a critical role in different varieties of prosopagnosia and of multimodal people recognition disorders.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3108284&req=5

Figure 1: Critical areas of the right and left, temporal and occipital lobes that could play a critical role in different varieties of prosopagnosia and of multimodal people recognition disorders.
Mentions: The main results of this review concern, on one hand, the qualitative differences between defects of visual recognition observed in patients with lesions involving the ventral TO structures of the right and left hemisphere and, on the other hand, the distinction between “prosopagnosia” and “multimodal people recognition disorders.” This second point of our review has led us to take into account aspects of familiar people recognition (such as the voice or the name) that clearly exceed the specific issue of prosopagnosia. This was made with two aims in mind: (a) to place the discussion of prosopagnosia in the more general context of familiar people recognition disorders; (b) to stress the need of investigating the other modalities of people recognition before considering a patients with face recognition disorders as an instance of prosopagnosia. In order to clarify the various parts of this discussion, we have reported in Figure 1 the critical areas of the right and left temporal and occipital lobes that could play a critical role in different varieties of prosopagnosia and of multimodal familiar people recognition disorders:

Bottom Line: Results of our review seem to confirm these suggestions.Furthermore, face recognition defects resulting from right anterior temporal lesions can usually be considered as part of a multimodal people recognition disorder.The implications of our review are, therefore, the following: (1) to consider the components of visual agnosia often observed in prosopagnosic patients with bilateral TO lesions as part of a semantic defect, resulting from left-sided lesions (and not from prosopagnosia proper); (2) to systematically investigate voice recognition disorders in patients with right anterior temporal lesions to determine whether the face recognition defect should be considered a form of "associative prosopagnosia" or a form of the "multimodal people recognition disorder."

View Article: PubMed Central - PubMed

Affiliation: Department of Neuroscience, Neuropsychology Service, Università Cattolica di Roma Rome, Italy.

ABSTRACT
In the study of prosopagnosia, several issues (such as the specific or non-specific manifestations of prosopagnosia, the unitary or non-unitary nature of this syndrome and the mechanisms underlying face recognition disorders) are still controversial. Two main sources of variance partially accounting for these controversies could be the qualitative differences between the face recognition disorders observed in patients with prevalent lesions of the right or left hemisphere and in those with lesions encroaching upon the temporo-occipital (TO) or the (right) anterior temporal cortex. Results of our review seem to confirm these suggestions. Indeed, they show that (a) the most specific forms of prosopagnosia are due to lesions of a right posterior network including the occipital face area and the fusiform face area, whereas (b) the face identification defects observed in patients with left TO lesions seem due to a semantic defect impeding access to person-specific semantic information from the visual modality. Furthermore, face recognition defects resulting from right anterior temporal lesions can usually be considered as part of a multimodal people recognition disorder. The implications of our review are, therefore, the following: (1) to consider the components of visual agnosia often observed in prosopagnosic patients with bilateral TO lesions as part of a semantic defect, resulting from left-sided lesions (and not from prosopagnosia proper); (2) to systematically investigate voice recognition disorders in patients with right anterior temporal lesions to determine whether the face recognition defect should be considered a form of "associative prosopagnosia" or a form of the "multimodal people recognition disorder."

No MeSH data available.


Related in: MedlinePlus