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Related Concept Videos

Association Areas of the Cortex01:21

Association Areas of the Cortex

Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
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Charles Darwin proposed that facial expressions are an evolutionary adaptation for communication. He argued that these expressions are not influenced by culture but are universal across species. For example, a snarling expression with exposed teeth signals a threat in many animals, including humans. Darwin also suggested that displaying an emotion can intensify the feeling. Smiling, for example, could enhance one's sense of happiness. This idea laid the foundation for understanding the role of...
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Prosopagnosia, also known as face blindness, is the inability to recognize faces. In severe cases, individuals with prosopagnosia may not recognize close family members, including parents and spouses, by their faces. For instance, someone with prosopagnosia might walk past their child in a crowd, only realizing their mistake upon noticing their child's distinctive backpack or favorite jacket. Prosopagnosia specifically impairs facial recognition, while the recognition of other objects or...

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Published on: October 30, 2018

Neural correlates of face detection.

Xiaokun Xu1, Irving Biederman

  • 1Department of Psychology.

Cerebral Cortex (New York, N.Y. : 1991)
|February 1, 2013
PubMed
Summary

Face detection is crucial, but posterior face areas aren't solely responsible. This study shows bilateral occipito-temporal lesions impair face detection, even with normal vision.

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Vision Science

Background:

  • Face detection is vital for social interaction and survival.
  • Neural correlates of face detection are not fully understood.
  • Posterior face areas (e.g., FFA, OFA) are traditionally linked to face processing.

Observation:

  • A patient (MJH) with bilateral ventral temporal-occipital lesions (affecting FFA/OFA) reported no subjective face detection issues.
  • MJH exhibited normal visual acuity and contrast sensitivity.
  • Despite subjective reports, MJH demonstrated objective face detection deficits.

Findings:

  • MJH had reduced tolerance to phase spectrum noise for faces compared to cars.
  • His face detection threshold was significantly higher than controls.
Keywords:
face detectionfusiform face areaphase-coherency-defined thresholdsprosopagnosiasaccadic choice

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  • Bilateral occipito-temporal lesions impaired both face individuation and detection.

    • Implications:

    • Posterior face areas are not exclusively necessary for face detection.
    • Ventral temporal-occipital cortex plays a broader role in face detection than previously assumed.
    • Understanding these deficits offers insights into visual processing and social cognition.