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Related Experiment Video

Updated: Mar 14, 2026

Detrusor Underactivity Model in Rats by Conus Medullaris Transection
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Central Control Circuit for Context-Dependent Micturition.

Xun Helen Hou1, Minsuk Hyun1, Julian Taranda2

  • 1Howard Hughes Medical Institute, Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA.

Cell
|September 24, 2016
PubMed
Summary
This summary is machine-generated.

Mice micturition is influenced by smell and social status. Neurons expressing corticotropin-releasing hormone (Crh) in the pontine micturition center (PMC) integrate these signals to control bladder function.

Keywords:
Barrington's nucleusbladdercorticotropin-releasing hormonemedial pre-optic areamicturitionpons

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Area of Science:

  • Neuroscience
  • Animal Behavior
  • Physiology

Background:

  • Micturition (urine release) is vital for physiological function and social signaling in many species.
  • Understanding the neural control of micturition is crucial for both basic science and clinical applications.

Purpose of the Study:

  • To investigate the combined influence of olfaction and social hierarchy on micturition patterns in male mice.
  • To identify the neural circuits and specific neuronal populations involved in integrating micturition cues.

Main Methods:

  • Electrophysiological characterization of neurons within the pontine micturition center (PMC).
  • Tracing neuronal projections from the PMC to the spinal cord.
  • In vivo manipulation of neuronal activity (silencing) to assess behavioral impact.
  • Recording neuronal activity correlated with bladder contraction and micturition behavior.

Main Results:

  • A distinct cluster of corticotropin-releasing hormone (Crh)-expressing neurons in the PMC was identified.
  • These Crh-expressing neurons exhibit unique electrophysiological properties and project glutamatergically to the spinal cord.
  • Activity in PMC Crh-expressing neurons drives bladder contraction and is essential for normal micturition behavior.
  • These neurons receive integrated inputs from higher brain areas, modulating hierarchy-dependent micturition patterns.

Conclusions:

  • PMC Crh-expressing neurons act as a critical integration center for context-dependent micturition control.
  • Olfaction and social hierarchy signals converge on these neurons to modulate urine release.
  • This research elucidates a key neural mechanism underlying social and environmental influences on a fundamental physiological process.