Journal article
Transient inability to distinguish between faces: electrophysiologic studies
Journal of clinical neurophysiology, Vol.20(2), pp.102-110
04/2003
Handle:
https://hdl.handle.net/2376/105509
PMID: 12766682
Abstract
It is not known with certainty at which level of face processing by the cortex the distinction between a familiar and an unfamiliar face is made. Subdural electrodes were implanted under the fusiform gyrus of the right temporal lobe in a patient who developed an unusual inability to distinguish differences between faces as part of the epileptic aura ("all faces looked the same"). A cortical region located posterior to the epileptic focus was identified that exhibited a maximum evoked response to the presentation of facial images (N165), but not to objects, scenes, or character strings. Evoked potentials elicited by a variety of visual images indicated that any perturbation away from novel whole-face stimuli produced submaximal responses from this region of the right temporal lobe. Electrical stimulation of this region resulted in an impairment of face discrimination. It was found that presentation of familiar faces (grandmother, treating physician) produced a different response from that observed for novel faces. These observations demonstrate that within 165 msec of face presentation, and before the conscious precept of face familiarity has formed, this cortical region has already begun to distinguish between a familiar and an unfamiliar face.
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Details
- Title
- Transient inability to distinguish between faces: electrophysiologic studies
- Creators
- Trevor Mundel - Pfizer, Inc., Ann Arbor Laboratories, Michigan, USAJohn G MiltonAlexander DimitrovHugh W WilsonCharles PelizzariStephen UftringIvan TorresRobert K EricksonJean-Paul SpireVernon L Towle
- Publication Details
- Journal of clinical neurophysiology, Vol.20(2), pp.102-110
- Academic Unit
- Mathematics and Statistics, Department of
- Publisher
- United States
- Identifiers
- 99900546850101842
- Language
- English
- Resource Type
- Journal article