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The γ isoform of protein kinase C (PKCγ), which is concentrated in a specific class of interneurons within inner lamina II (IIi) of the spinal dorsal horn and medullary dorsal horn (MDH), is known to be involved in the development of mechanical allodynia, a widespread and intractable symptom of inflammatory or neuropathic pain. However, although genetic and pharmacological impairment of PKCγ were...
Migraine is a chronic disease with episodic manifestations. In a subgroup, attack frequency increases over time, leading to chronic migraine. One of the most important risk factors for migraine progression is frequency of headache attacks at baseline. Unfortunately, the actual effects of repeated activation of dural nociceptors are poorly known. We investigated the behavioral, anatomical, and electrophysiological...
The organization of efferent projections from the spinal trigeminal nucleus oralis (Sp5O) to the spinal cord in the rat was studied using the anterograde tracer Phaseolus vulgaris leucoagglutinin. Sp5O projections to the spinal cord are restricted to the cervical cord. No labeled terminal can be detected in the thoracic and lumbar cord. The organization of these projections happens to critically depend...
Diffuse noxious inhibitory controls (DNIC) are very powerful long-lasting descending inhibitory controls, which are pivotal in modulating the activity of spinal and trigeminal nociceptive neurons. The principal feature of DNIC is that they are subserved by a loop that involves supraspinal structures that have not yet been identified. Using behavioral, in vivo extracellular electrophysiological and...
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