Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
SHR Neuro Krebs Kardio Lipid Stoffw Microb
Rigaud, M; Gemes, G; Abram, SE; Dean, C; Hopp, FA; Stucky, CL; Eastwood, D; Tarima, S; Seagard, J; Hogan, QH.
Pain tests provoke modality-specific cardiovascular responses in awake, unrestrained rats.
Pain. 2011; 152(2):274-284
Doi: 10.1016/j.pain.2010.09.010
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- Führende Autor*innen der Med Uni Graz
- Rigaud Marcel
- Co-Autor*innen der Med Uni Graz
- Gemes Geza
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- Abstract:
- Nociception modulates heart rate (HR) and mean arterial pressure (MAP), suggesting their use of HR and MAP as indicators of pain in animals. We explored this with telemetric recording in unrestrained control and neuropathic (spinal nerve ligation) rats. Plantar stimulation was performed emulating techniques commonly used to measure pain, specifically brush stroke, von Frey fiber application, noxious pin stimulation, acetone for cooling, and radiant heating, while recording MAP, HR, and specific evoked somatomotor behaviors (none; simple withdrawal; or sustained lifting, shaking, and grooming representing hyperalgesia). Pin produced elevations in both HR and MAP, and greater responses accompanied hyperalgesia behavior compared to simple withdrawal. Von Frey stimulation depressed MAP, and increased HR only when stimulation produced hyperalgesia behavior, suggesting that minimal nociception occurs without this behavior. Brush increased MAP even when no movement was evoked. Cold elevated both HR and MAP whether or not there was withdrawal, but MAP increased more when withdrawal was triggered. Heating, consistently depressed HR and MAP, independent of behavior. Other than a greater HR response to pin in animals made hyperalgesic by injury, cardiovascular events evoked by stimulation did not differ between control and neuropathic animals. We conclude that (a) thermoregulation rather than pain may dominate responses to heat and cooling stimuli; (b) brush and cooling stimuli may be perceived and produce cardiovascular activation without nocifensive withdrawal; (c) sensations that produce hyperalgesia behavior are accompanied by greater cardiovascular activation than those producing simple withdrawal; and (d) von Frey stimulation lacks cardiovascular evidence of nociception except when hyperalgesia behavior is evoked.
- Find related publications in this database (using NLM MeSH Indexing)
- Animals -
- Blood Pressure - physiology
- Disease Models, Animal -
- Heart Rate - physiology
- Hyperalgesia - etiology
- Ligation - adverse effects
- Male -
- Neuralgia - etiology
- Pain Measurement - methods
- Rats -
- Rats, Sprague-Dawley -
- Skin - physiopathology
- Wakefulness - physiology
- Find related publications in this database (Keywords)
- Neuropathic pain
- Animal pain tests
- Nociception
- Pain models
- Rat
- Cardiovascular effects of pain