Table 2.

A summary of the main MEG/EEG studies showing alteration in gamma oscillations in migraine.

Study	Summary of Findings	Paradigm	Sample
Hall et al. [45]	Strong gamma-band desynchronisation in temporal areas for the 1 min of the migraine aura, slowly returning to baseline levels over a 16-min period.	Analysis of MEG activity during an episode of scintillating scotoma	Patient with aura
Liu et al. [94]	Increase in gamma power in the lateral cortical regions in those with acute migraine (both MA and MO) compared to controls.	Analysis of MEG activity during the headache attack.	22 patients with an acute migraine and 22 controls.
Li et al. [95]	Gamma-band oscillations in left frontal and temporal areas have higher power in migraineurs compared to control groups.	Resting-state MEG	25 migraine patients during the headache-free phase and 25 controls.
Bassez et al. [96]	No difference between controls and MO groups in the gamma-band response to painful laser stimulation.	EEG during laser stimulation	23 MO patients and 23 controls
Coppola et al. [28]	Evoked gamma-band amplitude recorded over the occipital region is increased in between attacks in MA.	EEG during visual stimulation	15 MO and 15 MA patients
Lisicki et al. [106]	Ictal and chronic migraine patients showed increased gamma-band power.	EEG during visual stimulation	70 migraine patients (30 interictal, 20 ictal episodic migraineurs, 20 chronic migraineurs), and 20 controls.
Coppola et al. [107]	Early high-frequency oscillations were smaller in the mixed migraine (MO and MA) during the interictal phase compared to control group	EEG activity of parietal area during somatosensory stimulation	29 migraineurs (14 MO, 15 MA) during the interictal phase, 13 migraineurs (9 MO, 4 MA) during the ictal phase, and 15 controls.