Texture segregation in traumatic brain injury--a VEP study

Vision Res. 2004 Nov;44(24):2835-42. doi: 10.1016/j.visres.2004.06.007.

Abstract

Visual evoked potentials (VEPs) were recorded to textures segregated by gradients in orientation or motion. Recordings were obtained in traumatic brain-injured (TBI) subjects and in normal controls. We analyzed both the low-level VEPs (llVEPs) evoked by homogenous stimuli, as well as the components associated with texture segregation (tsVEP) obtained through an appropriate linear combination. Our results suggest that the tsVEP, presumably higher up in the visual processing chain than the llVEP, is sensitive to TBI and can reveal further information as to the nature of possible information processing deficits after TBI. It could also help quantify cortical damage that is not revealed with more standard clinical tools.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Brain Injuries / complications
  • Brain Injuries / physiopathology
  • Brain Injuries / psychology*
  • Evoked Potentials, Visual*
  • Female
  • Humans
  • Male
  • Middle Aged
  • Motion Perception
  • Orientation
  • Pattern Recognition, Visual*
  • Photic Stimulation / methods
  • Psychophysics
  • Vision Disorders / etiology
  • Vision Disorders / physiopathology
  • Visual Cortex / physiopathology