title: Effectiveness of Greater Occipital Nerve Blocks in Migraine Prophylaxis.
abstract: BACKGROUND
  Peripheral nerve blocks have been used in primary headache treatment since a long time. In this study, we aimed to examine the efficiency of greater occipital nerve (GON) block in migraine prophylaxis.
  
  
  METHODS
  Data from migraine without aura patients who had GON block were collected and divided into two groups: Group PGON (n=25), which included patients who were under medical prophylaxis and had GON block, and Group GON (n=53), which included patients who had only GON blocks. Migraine was diagnosed using International Headache Society (IHS) classification. Data of 78 patients were analyzed. Headache attack frequency, headache duration, and severity were compared between and within groups in a 3-month follow-up period.
  
  
  RESULTS
  The decrease in headache parameters after GON block in both groups was significantly similar. Headache attack frequency decreased from 15.73±7.21 (pretreatment) to 4.52±3.61 (3rd month) in Group GON and from 13.76±8.07 to 3.28±2.15 in Group PGON (p<0.05). Headache duration decreased from 18.51±9.43 to 8.02±5.58 at 3rd month in Group GON and from 15.20±9.16 to 7.20±4.16 in Group PGON (p<0.05). Headache severity decreased from 8.26±1.32 to 5.16±2.64 in Group GON and from 8.08±0.90 to 5.96±1.20 in Group PGON (p<0.05). There was no statistically significant difference between the groups in 3rd month after treatment (p>0.05).
  
  
  CONCLUSIONS
  This study showed significant decreases in headache parameters in both groups. As GON blocks were performed in patients unresponsive to medical prophylaxis, a decrease in the headache parameters in Group PGON similar to that in Group GON can be attributed to GON blocks. Consequently, these results show that repeated GON blocks with local anesthetic can be an effective alternative treatment in migraine patients who are unresponsive to medical prophylaxis or who do not prefer to use medical prophylaxis.
authors.affiliation: Department of Anaesthesiology and Algology, Gazi University School of Medicine, Ankara, Turkey.
authors.forename: Nurten
authors.initials: N
authors.lastname: Inan
authors.affiliation: Neurology and Algology, Ministry of Health Ankara Training and Research Hospital, Ankara, Turkey.
authors.forename: Levent E
authors.initials: LE
authors.lastname: Inan
authors.affiliation: Department of Neurology and Algology, Gazi University School of Medicine, Ankara, Turkey.
authors.forename: Özlem
authors.initials: Ö
authors.lastname: Coşkun
authors.affiliation: Department of Neurology, Gazi University School of Medicine, Ankara, Turkey.
authors.forename: Tuğba
authors.initials: T
authors.lastname: Tunç
authors.affiliation: Department of Public Health, Gazi University School of Medicine, Ankara, Turkey.
authors.forename: Mustafa
authors.initials: M
authors.lastname: Ilhan
keywords: Headache; greater occipital nerve block; migraine; prophylaxis