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Related Experiment Videos

Cerebral activation during micturition in normal men.

S Nour1, C Svarer, J K Kristensen

  • 1The Neurobiology Research Unit, N9201, KF3982, The National University Hospital, Rigshospitalet, Copenhagen, Denmark.

Brain : a Journal of Neurology
|March 29, 2000
PubMed
Summary

This study used PET scans to map brain activity during micturition in men. It confirmed that a wide network of brain regions controls bladder function, supporting previous research.

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Area of Science:

  • Neuroscience
  • Urology
  • Radiology

Background:

  • Cerebral lesions highlight the brain's role in micturition control.
  • Previous studies implicated specific brain areas like the medulla oblongata, pons, and frontal lobe.

Purpose of the Study:

  • To confirm cerebral activation during micturition in normal men using Positron Emission Tomography (PET).
  • To identify precise anatomical cerebral structures involved in micturition control.

Main Methods:

  • PET scans measured regional cerebral blood flow using (15)O water during rest, simulated micturition, and urine withholding.
  • Cystometry monitored bladder activity, and data were analyzed using statistical parametric mapping.

Main Results:

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  • Micturition activated a broad network of cortical and subcortical regions, including the postcentral gyrus, inferior frontal gyrus, thalamus, and midbrain.
  • Specific activations were observed in the middle and superior frontal gyri, cerebellum, and insula.
  • Urine withholding showed a tendency for left insula activation.

    • Conclusions:

    • Micturition involves a complex interplay of numerous cortical and subcortical brain regions in healthy males.
    • Findings validate and expand upon clinical and animal studies of micturition control.