Open Access

Spontaneous migraine attack causes alterations in default mode network connectivity: a resting-state fMRI case report

  • Andrea Edit Edes1, 2, 3Email author,
  • Lajos Rudolf Kozak1, 4,
  • Mate Magyar1, 5,
  • Terezia Zsombok1, 2, 5,
  • Gyongyi Kokonyei1, 2, 6,
  • Gyorgy Bagdy2, 3, 7 and
  • Gabriella Juhasz1, 2, 3, 8
Contributed equally
BMC Research Notes201710:165

https://doi.org/10.1186/s13104-017-2484-1

Received: 12 September 2016

Accepted: 6 April 2017

Published: 26 April 2017

Abstract

Background

Although migraine is one of the most investigated neurologic disorders, we do not have a perfect neuroimaging biomarker for its pathophysiology. One option to improve our knowledge is to study resting-state functional connectivity in and out of headache pain. However, our understanding of the functional connectivity changes during spontaneous migraine attack is partial and incomplete.

Case presentation

Using resting-state functional magnetic resonance imaging we assessed a 24-year old woman affected by migraine without aura at two different times: during a spontaneous migraine attack and in interictal phase. Seed-to-voxel whole brain analysis was carried out using the posterior cingulate cortex as a seed, representing the default mode network (DMN). Our results showed decreased intrinsic connectivity within core regions of the DMN with an exception of a subsystem including the dorsal medial and superior frontal gyri, and the mid-temporal gyrus which is responsible for pain interpretation and control. In addition, increased connectivity between the DMN and pain and specific migraine-related areas, such as the pons and hypothalamus, developed during the spontaneous migraine attack.

Conclusion

Our preliminary results provide further support for the hypothesis that alterations of the DMN functional connectivity during migraine headache may lead to maladaptive top-down modulation of migraine pain-related areas which might be a specific biomarker for migraine.

Keywords

Neuroimaging Functional connectivity Migraine Migraine attack Headache pain Pain processing Case report

Background

Pain connectome investigations in migraine, using functional magnetic resonance (fMRI) studies during rest and pain suggest that the number of attacks depend on resting-state functional connectivity between the default mode network (DMN), the salience network (SN) and the periaqueductal gray [1, 2]. However, most of these alterations are not migraine-specific and similar biases in functional connectivity can be observed in other chronic pain disorders [3]. In addition, much less is known about the pain connectome signature of acute migraine attacks. Only one study has investigated the effect of pharmacologically induced migraine attack on resting-state functional connectivity, reporting widespread alterations in DMN connectivity with different brain areas [4]. To our knowledge there are no data about spontaneous migraine pain connectome available in the scientific literature so far. In our present work we analysed resting-state fMRI data of a patient with migraine without aura who participated in two fMRI scans and suffered a migraine attack on the second occasion.

Case presentation

Here we report a case of a 24-year old female migraine without aura patient who participated in two resting-state fMRI sessions (31 days apart) in our study. The diagnosis of migraine was made by a headache specialist according to the International Headache Society criteria [5]. The headache attacks occurred approximately 4 times per month since age 14. They were severe in intensity (7–8 on a scale of 1–10) and had a throbbing quality with nausea, vomiting and photophobia. A typical episode lasted 4–72 h. Her migraine was not related to menstrual cycle. The patient had no other medical conditions and had not taken any daily medications except a contraceptive (gestodene, ethinylestradiol). Both the interictal and ictal scans were carried out on pill-taking days. Migraine attacks were treated with diclofenac and domperidone for nausea.

During the 3 days preceding the fMRI scans she was pain- and medication-free both times. At the second occasion she suffered an unexpected migraine attack during the examination that she subsequently described as a bilateral, throbbing pain (7/10) aggravated by head motion and associated with photophobia and nausea, and after the scan she vomited. In the beginning of the ictal image recording the pain was moderate (3/10) and pulsating with mild photophobia.

Functional MRI data acquisition was performed in the MR Research Center (Semmelweis University, Budapest, Hungary) with a 3 T Achieva MRI scanner (Philips Medical Systems, Best, The Netherlands) using a BOLD-sensitive T2*-weighted echo-planar imaging sequence (TR = 2.500 ms, TE = 30 ms, FOV = 240 × 240 mm2) with 3 × 3 mm in-plane resolution and contiguous 3-mm slices providing whole brain coverage. A series of anatomical images were also acquired during the first imaging session using T1-weighted 3D TFE sequence with 1 × 1 × 1 mm resolution. To determine the significant alterations in the functional connectivity, a period of 4 min from both sessions was selected, while the patient was in rest and with eyes opened. Imaging data were analysed using statistical parametrical mapping 12 (SPM 12, Friston, The Welcome Department of Cognitive Neurology, London, UK) and the CONN toolbox for MATLAB, using seed-to-voxel whole brain analysis, with false discovery rate (FDR) correction at p ≤ 0.05 significance level and a minimum cluster size limit of 50 voxels. The DMN seed region was chosen according to the work of Amin and colleagues [4] [posterior cingulate cortex, Montreal Neurological Institute (MNI) coordinates −2 −60 36, R = 10 mm) to make our results comparable to the reported connectivity changes obtained during PACAP38-induced migraine attacks.

The study was approved by the Scientific and Research Ethics Committee of the Medical Research Council, Budapest, Hungary (23609-1/2011-EKU) and was carried out according to the Declaration of Helsinki. The subject gave written informed consent.

Results

During spontaneous migraine attack the DMN showed increased functional connectivity with brain areas related to pain, e.g. thalamus, insula and left postcentral gyrus, and decreased connectivity within the DMN (e.g. precuneus, ventral medial prefrontal cortex, angular gyrus). However, a subsystem of the DMN containing the dorsal medial frontal cortex (dMFC), the superior frontal gyrus (SFG) and the mid temporal gyrus (MidTG) showed increased FC. In addition, increased functional connectivity appeared with the pons and the hypothalamus (Table 1; Fig. 1).
Table 1

Altered resting-state functional connectivity with DMN during spontaneous migraine attack compared to interictal phase

Conn

Brain regions

Side

Number of voxels

MNI coordinates

Conn

Brain regions

Side

Number of voxels

MNI coordinates

X

Y

Z

X

Y

Z

Increased

Lingual gyrus, cuneus

B

4691

26

−66

4

Decreased

ITG, Fusiform gyrus

L

2125

−56

−72

−14

IOG

L

156

−36

−100

−8

 

R

1004

58

−30

−34

IPG, PostCG, PreCG, Thal, Caud, hypothalamus

B

10,486

−46

−24

44

ITG

L

80

−68

−32

−20

ITG

R

61

52

−18

−36

MidTG

R

516

58

2

−10

STG

L

55

−30

10

−26

STG

L

384

−66

−24

8

 

L

253

−60

10

−2

 

R

280

40

16

−38

MidTG

R

423

46

−68

16

Fusiform gyrus

R

467

34

−32

−18

dMFC, SFG

B

1449

10

56

24

Gyrus rectus, vMFC

L

668

−6

40

−24

SFG

L

86

−20

56

14

MidFG

R

451

22

20

38

dMFC

L

63

−4

28

58

 

L

129

−34

40

−2

MidFG

R

289

38

62

−16

 

L

60

−24

−4

56

 

R

87

42

36

40

SFG

L

573

−22

26

54

SMA

B

68

−4

16

64

 

R

70

8

4

72

PreCG, PostCG

R

1585

36

−10

50

IFG

R

278

34

34

−18

PreCG

L

145

−10

−34

70

PreCG

R

79

16

−32

66

Insula, claustrum, putamen, pallidum

R

327

36

−18

4

Angular gyrus

R

943

42

−66

36

MCC

R

189

16

−2

40

 

L

1403

−38

−68

36

PHC

R

52

28

−20

−26

PostCG

R

84

46

−24

64

Pons

L

52

−4

−22

−26

PCC, precuneus

R

438

6

−52

16

Putamen

L

325

−26

16

0

 

R

101

2

−38

8

Cerebellum

R

613

28

−56

−60

MCC

R

133

14

−34

24

 

L

336

−28

−54

−52

 

B

127

4

−34

36

 

R

177

4

−70

−40

Hippocampus

R

288

22

−16

−6

 

L

610

−30

−86

−28

Cerebellum

R

65

10

−54

−52

 

L

172

−24

−46

−28

 

B

182

2

−44

−12

 

R

133

36

−72

−24

       

Italic part of DMN; bold part of pain matrix

Conn connectivity, R right, L left, B bilateral, dMFC dorsal medial frontal cortex, IFG inferior frontal gyrus, IOG inferior occipital gyrus, IPG inferior parietal gyrus, ITG inferior temporal gyrus, MCC middle cingulate gyrus, MidFG middle frontal gyrus, MidTG middle temporal gyrus, PCC posterior cingulate cortex, PHC parahippocampal gyrus, PostCG postcentral gyrus, PreCG precentral gyrus, SFG superior frontal gyrus, SMA supplementary motor area, STG superior temporal gyrus, Thal thalamus, Caud caudate, vMFC ventral medial frontal cortex (p < 0.05, FDR corrected; cluster size limit = 50 voxel)

Fig. 1

Altered resting-state functional connectivity with DMN during spontaneous migraine attack compared to interictal phase, axial view, pain-related regions written out. Red: ictal > interictal, Blue: interictal > ictal. (p < 0.05, FDR corrected; no cluster size limit)

Conclusions

Our results demonstrated that during spontaneous migraine attack the intrinsically salient migraine pain decreased functional connectivity within core regions of the DMN, and in parallel connectivity increased between the DMN and SN as a marker of attentional shift towards pain, and also increased between the DMN and regions of pain matrix [2]. These findings support the idea of dynamically changing functional connectivity during migraine cycle, similarly to an earlier longitudinal resting state fMRI study [6].

However, some functional connectivity changes during migraine pain may contribute to longstanding alterations in brain function and thus promote the recurrence of migraine attacks. For example, a subsystem of the DMN, namely the dMFC, SFG and MidTG showed increased functional connectivity with the DMN seed represented by PCC, both in our spontaneous migraine case and during pharmacologically induced migraine attacks [4], which plays an important role in pain interpretation and control [7], and showed a significant difference between migraine without aura patients and controls during interictal phase [8]. In addition, the dMFC which is not only part of the DMN but belongs to the pain connectome, has an important role in pain modulation through shifting attention towards and away from the unpleasant sense [9] and has increased functional connectivity with other DMN regions in chronic pain patients [10, 11]. This altered FC has been found to be positively correlated with pain rumination which is an indicator of unfavourable clinical outcome in chronic pain patients [10].

A previous study reported enhanced functional coupling between the hypothalamus and the middle pons during migraine attack in a patient in response to painful stimuli [12]. In our case, the DMN seed functional connectivity increased with a special region in the pons that was previously identified as migraine generator [13], and with the hypothalamus that is in line with the recent hypothesis which suggested that migraine attacks might be initiated by functional connectivity changes between the hypothalamo–brainstem areas [12].

Despite that the present work is about a single case, and both our and previous studies investigated only female migraine patients [4, 12], these preliminary results further emphasize that alterations of the DMN functional connectivity during migraine attacks may lead to neuroplastic changes in the frontal cortical pain modulating network, which can lead to maladaptive top-down control of the hypothalamo–brainstem areas. Thus resting-state functional connectivity changes in migraineurs might be neuroimaging biomarkers for migraine pathophysiology. In the future, large prospective studies are required to investigate the resting state functional connectivity changes during both spontaneous and pharmacologically induced migraine attacks and to compare them to normal fluctuations in healthy control groups, to verify this hypothesis.

Notes

Declarations

Authors’ contributions

GJ designed the original study. AEE, GK and GJ collected the data. AEE and LRK analysed the data. AEE, TZ and MM drafted the paper. All authors critically reviewed the paper. All authors read and approved the final manuscript.

Acknowledgements

The study was supported by the MTA-SE-NAP B Genetic Brain Imaging Migraine Research Group, Hungarian Academy of Sciences, Semmelweis University (Grant No. KTIA_NAP_13-2-2015-0001), and the Hungarian Academy of Sciences (MTA-SE Neuropsychopharmacology and Neurochemistry Research Group). L. R. K. was supported by the Bolyai Research Fellowship Program of the Hungarian Academy of Sciences. The funders had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.

Competing interests

The authors declare that they have no competing interests.

Availability of data and materials

The datasets during and/or analysed during the current study available from the corresponding author on reasonable request.

Consent to publish

Written informed consent was obtained from the patient for publication of this Case Report and any accompanying images.

Ethics approval and consent to participate

The study was approved by the Scientific and Research Ethics Committee of the Medical Research Council, Budapest, Hungary (23609-1/2011-EKU). The subject gave written informed consent.

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Authors’ Affiliations

(1)
MTA-SE-NAP B Genetic Brain Imaging Migraine Research Group, Hungarian Academy of Sciences, Semmelweis University
(2)
MTA-SE Neuropsychopharmacology and Neurochemistry Research Group, Hungarian Academy of Sciences, Semmelweis University
(3)
Department of Pharmacodynamics, Faculty of Pharmacy, Semmelweis University
(4)
MR Research Center, Semmelweis University
(5)
Department of Neurology, Faculty of Medicine, Semmelweis University
(6)
Institute of Psychology, Eotvos Lorand University
(7)
NAP-A-SE Research Group, Hungarian Academy of Sciences, Semmelweis University
(8)
Neuroscience and Psychiatry Unit, Manchester Academic Health Sciences Centre, The University of Manchester

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