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Firing patterns of micturition-related neurons in the pontine storage centre in cats
- Source :
- Autonomic Neuroscience. 99:24-30
- Publication Year :
- 2002
- Publisher :
- Elsevier BV, 2002.
-
Abstract
- The pontine storage centre (PSC) and the pontine micturition centre (PMC) are known to be critical for urinary filling and emptying, respectively. In the present study, firing patterns of 45 neurons in the PSC area where electrical stimulation induced inhibition of the micturition reflex were analyzed in 20 male decerebrated and paralyzed cats. The electrically determined PSC area was widespread in the dorsolateral pontine reticular formation (P0-P4), ventrolateral to the PMC. Four major types of neurons were detected according to urinary storage/micturition cycles: tonic storage neurons (38%), phasic storage neurons (40%), tonic micturition neurons (9%) and phasic micturition neurons (13%). These four types of neurons were intermingled in the PSC. However, the tonic and phasic micturition neurons tended to be located within a limited area (P2-P3). These neurons were further classified into augmenting, constant and decrementing firing patterns. Some increased their firing prior to the storage/micturition phase initiation. Such preceding pattern was more frequently found in the tonic neurons than in the phasic neurons. In conclusion, the PSC neurons with diverse heterogeneous discharge patterns suggest that these neurons may organize a complex neuronal circuitry, which is critical in the neural control of the urinary continence.
- Subjects :
- Male
media_common.quotation_subject
Urinary Bladder
Action Potentials
Urination
Biology
Reticular formation
Efferent Pathways
Tonic (physiology)
Cellular and Molecular Neuroscience
Pons
medicine
Animals
Single-unit recording
media_common
Neurons
Endocrine and Autonomic Systems
Reticular Formation
Muscle, Smooth
Paramedian pontine reticular formation
Spinal cord
Electrophysiology
medicine.anatomical_structure
Spinal Cord
nervous system
Cats
Neurology (clinical)
Neuroscience
Muscle Contraction
Subjects
Details
- ISSN :
- 15660702
- Volume :
- 99
- Database :
- OpenAIRE
- Journal :
- Autonomic Neuroscience
- Accession number :
- edsair.doi.dedup.....9e96f56086d0e7666c625d9ee9a6b760