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Related Experiment Video

Updated: Jun 22, 2026

3D-Neuronavigation In Vivo Through a Patient's Brain During a Spontaneous Migraine Headache
10:39

3D-Neuronavigation In Vivo Through a Patient's Brain During a Spontaneous Migraine Headache

Published on: June 2, 2014

Visual evoked potential and spatial frequency in migraine: a longitudinal study.

T Sand1, L R White, K Hagen

  • 1Department of Neuroscience, Norwegian University of Science and Technology and St Olavs University Hospital, Trondheim, Norway. trond.sand@ntnu.no

Acta Neurologica Scandinavica. Supplementum
|July 2, 2009
PubMed
Summary

Migraine patients exhibit heightened cortical excitability, particularly before an attack. This suggests decreased inhibition in visual pathways, influenced by headache severity, impacting visual evoked potentials (VEP).

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Last Updated: Jun 22, 2026

3D-Neuronavigation In Vivo Through a Patient's Brain During a Spontaneous Migraine Headache
10:39

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Published on: June 2, 2014

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Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns
09:42

Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns

Published on: May 12, 2019

Area of Science:

  • Neuroscience
  • Ophthalmology
  • Neurology

Background:

  • Reduced habituation of visual evoked potentials (VEP) is a known characteristic in migraine.
  • Understanding pre-attack excitability changes is crucial for migraine pathophysiology.

Purpose of the Study:

  • To investigate if pre-attack cortical excitability changes in migraine are related to check size.
  • To analyze magnocellular and parvocellular pathway function in migraine patients.

Main Methods:

  • Studied magnocellular and parvocellular functions using 31 and 62 checks in migraine with aura (MA), migraine without aura (MwoA), and control groups.
  • Recorded VEP amplitudes (N1P1, P1N2) in pre-attack and interictal sessions.

Main Results:

  • Migraine patients (MA and MwoA) showed significantly higher VEP amplitudes (P1N2, N1P1) compared to controls.
  • Migraine patients exhibited increased P1N2 amplitude before an attack versus interictal periods, especially with large checks.
  • No VEP amplitude habituation was observed in control participants.

Conclusions:

  • Cortical excitability is elevated in migraine with aura.
  • Headache severity correlates with visual excitability changes.
  • Increased pre-attack P1N2 VEP amplitude indicates potential cyclic decreases in intracortical inhibition within extrastriate magnocellular pathways in migraine.