Perceptual Functions in Prosopagnosia

@article{Barton2004PerceptualFI,
  title={Perceptual Functions in Prosopagnosia},
  author={Jason J.S. Barton and Mariya V. Cherkasova and Daniel Z. Press and James Intriligator and Margaret O'Connor},
  journal={Perception},
  year={2004},
  volume={33},
  pages={939 - 956}
}
Some patients with prosopagnosia may have an apperceptive basis to their recognition defect. Perceptual abnormalities have been reported in single cases or small series, but the causal link of such deficits to prosopagnosia is unclear. Our goal was to identify candidate perceptual processes that might contribute to prosopagnosia, by subjecting several prosopagnosic patients to a battery of functions that may be necessary for accurate facial perception. We tested seven prosopagnosic patients… 

Figures and Tables from this paper

Structure and function in acquired prosopagnosia: lessons from a series of 10 patients with brain damage.

  • J. Barton
  • Psychology, Biology
    Journal of neuropsychology
  • 2008
TLDR
The findings suggest that prosopagnosia is more severe with bilateral than unilateral lesions, indicating a minor contribution of the left hemisphere to face recognition, and access to facial memories is most disrupted by bilateral lesions that also include the right anterior temporal lobe.

Progress in perceptual research: the case of prosopagnosia

TLDR
There have been recent rehabilitative trials of perceptual learning applied to larger groups of prosopagnosic subjects that show that face impairments are not immutable in this condition.

Acquired prosopagnosia with spared within-class object recognition but impaired recognition of degraded basic-level objects

TLDR
Herschel is severely impaired with the recognition of familiar faces, discrimination between unfamiliar identities, and the perception of facial expression and gender, and presents a challenge to hierarchical models of object perception.

Preservation of mouth region processing in two cases of prosopagnosia.

TLDR
The obtained findings demonstrate that prosopagnosia does not necessarily cause a global impairment to face perception, but a selective impairment to the perception of information in the upper half of the face.

Structural imaging reveals anatomical alterations in inferotemporal cortex in congenital prosopagnosia.

TLDR
Detailed morphometric and volumetric analyses of the occipitotemporal cortex in a group of CP individuals and matched control subjects implicate a specific cortical structure as the neural basis of CP and target the aF gyrus as a potential site for further, focused genetic investigation.

Does Prosopagnosia Take the Eyes Out of Face Representations? Evidence for a Defect in Representing Diagnostic Facial Information following Brain Damage

TLDR
The findings reported here suggest that damage to the face processing system is characterized by an inability to use the information that is optimal to judge identity, focusing instead on suboptimal information.

cquired prosopagnosia as a face-specific disorder : Ruling out the general visual imilarity account

TLDR
It seems that brain damage in adulthood may lead to selective recognition impairment for faces, perhaps the only category of visual stimuli for which holistic/configural perception is not only potentially at play, but is idua strictly necessary to indivisible perception.
...

References

SHOWING 1-10 OF 66 REFERENCES

Lesions of the fusiform face area impair perception of facial configuration in prosopagnosia

TLDR
Perception of facial configuration is impaired in patients with prosopagnosia whose lesions involve the right fusiform gyrus, especially manifest when attention must be distributed across numerous facial elements.

Covert recognition in acquired and developmental prosopagnosia

TLDR
Extensive right occipitotemporal lesions with significant deficits in face perception are not incompatible with covert face processing, indicating that these are related phenomena.

Prosopagnosia in a right hemispherectomized patient.

TLDR
The occurrence of prosopagnosia in this hemispherectomized patient confirms that this deficit can emerge without damage to the left hemisphere, and her unawareness of her deficit, which had remained unnoticed for several years, raises the possibility that other hemisphereCTomized patients may be prosOPagnosic.

Prosopagnosia: A Reclassification

  • J. McNeilE. Warrington
  • Psychology, Medicine
    The Quarterly journal of experimental psychology. A, Human experimental psychology
  • 1991
TLDR
It is concluded that impaired performance on tests of face perception does not contribute to difficulties in recognizing familiar faces, and it is suggested that the two types of prosopagnosia may be described in terms either of a disconnection of the face recognition units or of damage to the units themselves.

Recognition of unfamiliar faces in prosopagnosia

Progressive prosopagnosia associated with selective right temporal lobe atrophy. A new syndrome?

TLDR
It is suggested that V.H.'s prosopagnosic deficit began as a modality-specific disorder which has progressed to a cross-modality loss of person-based semantic knowledge, and shows a striking dissociation between her ability to recognize faces and unique exemplars from other categories, such as buildings and flowers, which confirms the hypothesis that face processing is indeed special.

Visual memory and perceptual impairments in prosopagnosia.

TLDR
A patient who suffered traumatic hematomas of both occipitotemporal regions, but who had normal visual acuity, language, and cognitive functions, could not recognize faces of family members, celebrities, or recent acquaintances (prosopagnosia), which is suggested to be part of a more general inability to distinguish among objects within a visual semantic class.

Covert and overt recognition in prosopagnosia.

TLDR
Results indicated that P.H. does show covert recognition of cars and flowers, as well as faces, which would be consistent with the idea that face recognition and recognition of other visually similar stimuli are performed by the same underlying functional mechanisms.
...