Skip to main content
Top
Published in: The Journal of Headache and Pain 1/2018

Open Access 01-12-2018 | Research article

Neurophysiological correlates of clinical improvement after greater occipital nerve (GON) block in chronic migraine: relevance for chronic migraine pathophysiology

Authors: Alessandro Viganò, Maria Claudia Torrieri, Massimiliano Toscano, Francesca Puledda, Barbara Petolicchio, Tullia Sasso D’Elia, Angela Verzina, Sonia Ruggiero, Marta Altieri, Edoardo Vicenzini, Jean Schoenen, Vittorio Di Piero

Published in: The Journal of Headache and Pain | Issue 1/2018

Login to get access

Abstract

Background

Therapeutic management of Chronic Migraine (CM), often associated with Medication Overuse Headache (MOH), is chiefly empirical, as no biomarker predicting or correlating with clinical efficacy is available to address therapeutic choices. The present study searched for neurophysiological correlates of Greater Occipital Nerve Block (GON-B) effects in CM.

Methods

We recruited 17 CM women, of whom 12 with MOH, and 19 healthy volunteers (HV). Patients had no preventive treatment since at least 3 months. After a 30-day baseline, they received a bilateral betamethasone-lidocaine GON-B of which the therapeutic effect was assessed 1 month later. Habituation of visual evoked potentials (VEP) and intensity dependence of auditory evoked potentials (IDAP) were recorded before and 1 week after the GON-B.

Results

At baseline, CM patients had a VEP habituation not different from HV, but a steeper IDAP value than HV (p = 0.01), suggestive of a lower serotonergic tone. GON-B significantly reduced the number of total headache days per month (− 34.9%; p = 0.003). Eight out 17CM patients reversed to episodic migraine and medication overuse resolved in 11 out of 12 patients. One week after the GON-B VEP habituation became lacking respect to baseline (p = 0.01) and to that of HV (p = 0.02) like in episodic migraine, while the IDAP slope significantly flattened (p < 0.0001). GON-B-induced reduction in headache days positively correlated with IDAP slope decrease (rho = 0.51, p = 0.03).

Conclusions

GON-B may be effective in the treatment of CM, with or without MOH. The pre-treatment IDAP increase is compatible with a weak central serotonergic tone, which is strengthened after GON-B, suggesting that serotonergic mechanisms may play a role in CM and its reversion to episodic migraine. Since the degree of post-treatment IDAP decrease is correlated with clinical improvement, IDAP might be potentially useful as an early predictor of GON-B efficacy.
Literature
10.
25.
go back to reference Wutzler A, Winter C, Kitzrow W et al (2008) Loudness dependence of auditory evoked potentials as indicator of central serotonergic neurotransmission: simultaneous electrophysiological recordings and in vivo microdialysis in the rat primary auditory cortex. Neuropsychopharmacol Off Publ Am Coll Neuropsychopharmacol 33:3176–3181. https://doi.org/10.1038/npp.2008.42 CrossRef Wutzler A, Winter C, Kitzrow W et al (2008) Loudness dependence of auditory evoked potentials as indicator of central serotonergic neurotransmission: simultaneous electrophysiological recordings and in vivo microdialysis in the rat primary auditory cortex. Neuropsychopharmacol Off Publ Am Coll Neuropsychopharmacol 33:3176–3181. https://​doi.​org/​10.​1038/​npp.​2008.​42 CrossRef
Metadata
Title
Neurophysiological correlates of clinical improvement after greater occipital nerve (GON) block in chronic migraine: relevance for chronic migraine pathophysiology
Authors
Alessandro Viganò
Maria Claudia Torrieri
Massimiliano Toscano
Francesca Puledda
Barbara Petolicchio
Tullia Sasso D’Elia
Angela Verzina
Sonia Ruggiero
Marta Altieri
Edoardo Vicenzini
Jean Schoenen
Vittorio Di Piero
Publication date
01-12-2018
Publisher
Springer Milan
Published in
The Journal of Headache and Pain / Issue 1/2018
Print ISSN: 1129-2369
Electronic ISSN: 1129-2377
DOI
https://doi.org/10.1186/s10194-018-0901-z

Other articles of this Issue 1/2018

The Journal of Headache and Pain 1/2018 Go to the issue