Somatic sensory information has been acknowledged to reach the cerebral cortex by one or more of three afferent pathways. Upon entering the spinal cord, dorsal root fibers may ascend as part of the lemniscal system, the spinothalamic tract or the spino-reticulothalamic system. Different somatic sensations are experienced, in part, due to the selective sensitivity of the skin receptors and also because the impulses generated by the stimulation of these receptors are channeled along the above pathways to various areas of the cortex.
KeywordsSpinal Cord Opioid Receptor Dorsal Horn Passive Avoidance Opioid Peptide
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