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Newborn rat brainstem preparation with the trigeminal nerve attached for pain study
1Department of Physiology, Showa University, School of Dentistry, Hatanodai 1-5-8, Shinagawa-ku, Tokyo 142, Japan.
Brain Research. Brain Research Protocols
|October 10, 1998
Summary
This study details a new brainstem preparation method for studying pain processing in newborn rats. The technique allows for the investigation of neuroplasticity in pain-sensing neurons, demonstrating its feasibility for pain research.
Area of Science:
- Neuroscience
- Pain Research
- Physiology
Background:
- The isolated brainstem-spinal cord preparation from newborn rats has been crucial for understanding respiratory center neurophysiology.
- Recent modifications allow for a brainstem preparation with attached trigeminal primary afferents, enabling pain studies.
Purpose of the Study:
- To describe the isolation method for a brainstem preparation with the trigeminal mandibular nerve attached.
- To demonstrate the recording of synaptic responses in caudal neurons using whole-cell patch clamp.
- To validate the preparation's applicability for neuroplasticity studies in pain-processing pathways.
Main Methods:
- Isolation of a newborn rat brainstem preparation with the trigeminal mandibular nerve.
- Whole-cell patch clamp recordings from caudal neurons.
- Stimulation of the mandibular nerve to evoke synaptic responses.
Main Results:
- The brainstem preparation is suitable for studying activity-dependent changes in pain-processing neurons, such as the wind-up phenomenon.
- Repetitive stimulation induced responses in caudal neurons at postnatal day 1.
- The preparation facilitates neuroplasticity studies at pain-processing synapses.
Conclusions:
- The described brainstem preparation method is feasible for pain research.
- This preparation allows for detailed investigation of neuroplasticity in cranio-facial pain pathways.
- The technique is valuable for understanding pain mechanisms at the synaptic level.