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. 2014 Sep;192(3):947-55.
doi: 10.1016/j.juro.2014.03.093. Epub 2014 Mar 26.

Alterations in resting state oscillations and connectivity in sensory and motor networks in women with interstitial cystitis/painful bladder syndrome

Affiliations

Alterations in resting state oscillations and connectivity in sensory and motor networks in women with interstitial cystitis/painful bladder syndrome

Lisa A Kilpatrick et al. J Urol. 2014 Sep.

Abstract

Purpose: The pathophysiology of interstitial cystitis/painful bladder syndrome remains incompletely understood but is thought to involve central disturbance in the processing of pain and viscerosensory signals. We identified differences in brain activity and connectivity between female patients with interstitial cystitis/painful bladder syndrome and healthy controls to advance clinical phenotyping and treatment efforts for interstitial cystitis/painful bladder syndrome.

Materials and methods: We examined oscillation dynamics of intrinsic brain activity in a large sample of well phenotyped female patients with interstitial cystitis/painful bladder syndrome and female healthy controls. Data were collected during 10-minute resting functional magnetic resonance imaging as part of the Multidisciplinary Approach to the Study of Chronic Pelvic Pain Research Network project. The blood oxygen level dependent signal was transformed to the frequency domain. Relative power was calculated for multiple frequency bands.

Results: Results demonstrated altered frequency distributions in viscerosensory (post insula), somatosensory (postcentral gyrus) and motor regions (anterior paracentral lobule, and medial and ventral supplementary motor areas) in patients with interstitial cystitis/painful bladder syndrome. Also, the anterior paracentral lobule, and medial and ventral supplementary motor areas showed increased functional connectivity to the midbrain (red nucleus) and cerebellum. This increased functional connectivity was greatest in patients who reported pain during bladder filling.

Conclusions: Findings suggest that women with interstitial cystitis/painful bladder syndrome have a sensorimotor component to the pathological condition involving an alteration in intrinsic oscillations and connectivity in a cortico-cerebellar network previously associated with bladder function.

Keywords: brain mapping; cystitis; interstitial; magnetic resonance imaging; pain; urinary bladder.

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Figures

Figure 1
Figure 1
(A) PelMotor, SMA, and paracentral lobule (shown in red) demonstrated increased LF power and increased LF connectivity with a region in the right midbrain (red nucleus) and regions within the cerebellular vermis VI/VII and right lobule VI (shown in yellow) in patients compared to controls. (B) pINS (shown in blue) demonstrated decreased LF power and decreased LF connectivity with mINS (shown in green) in patients compared to controls.
Figure 1
Figure 1
(A) PelMotor, SMA, and paracentral lobule (shown in red) demonstrated increased LF power and increased LF connectivity with a region in the right midbrain (red nucleus) and regions within the cerebellular vermis VI/VII and right lobule VI (shown in yellow) in patients compared to controls. (B) pINS (shown in blue) demonstrated decreased LF power and decreased LF connectivity with mINS (shown in green) in patients compared to controls.
Figure 2
Figure 2
(A) The estimated mean functional connectivity (controlling for age ) between PelMotor, SMA, paracentral lobule and red nucleus/cerebellar regions (RN/cere) is shown for healthy controls, IC/PBS with pain during bladder filling (IC/PBS yes) and IC/PBS without pain during bladder filling (IC/PBS no). (B) Functional connectivity values are plotted for each individual within each of the 5 scanning sites. *p<0.05 compared to controls **p<0.05 compared to controls and IC/PBS no
Figure 2
Figure 2
(A) The estimated mean functional connectivity (controlling for age ) between PelMotor, SMA, paracentral lobule and red nucleus/cerebellar regions (RN/cere) is shown for healthy controls, IC/PBS with pain during bladder filling (IC/PBS yes) and IC/PBS without pain during bladder filling (IC/PBS no). (B) Functional connectivity values are plotted for each individual within each of the 5 scanning sites. *p<0.05 compared to controls **p<0.05 compared to controls and IC/PBS no

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