Abstract
Central conduction of sensory information from the periphery includes two different functions: to specify the characteristics of the stimuli in terms of sensory modalities, and to inform about stimulus localization. Subpopulations of primary sensory neurons concerned with different types of stimuli and morphological prerequisites for stimulus localization created by the generally restricted peripheral innervations areas of these neurons are essential in fulfilling these tasks. Separation of different types of stimuli and stimulus localization is present also at higher levels: in the spinal cord, brainstem, thalamus and cerebral cortex. Thus, observations in physiological studies have indicated that afferent fibers for different sensory modalities are connected to separated groups of second order sensory neurons which differ with regard to their dorsoventral location within, for instance, the spinal gray matter (for reviews see Willis and Coggeshall, 1978; Brown, 1981). Furthermore, other physiological observations have suggested a somatotopic pattern in the localization of these second order neurons, where each point in the periphery is represented at a specific site along the mediolateral extent of the dorsal horn (cf., Wall, 1960; Bryan et al., 1973; Brown and Fuchs, 1975; Light and Durkovic, 1984; Wilson et al., 1986).
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Molander, C., Grant, G. (1990). On the Organization of Cutaneous and Muscle Nerve Projections in the Rat Lumbar Dorsal Horn. In: Zenker, W., Neuhuber, W.L. (eds) The Primary Afferent Neuron. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-0579-8_13
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DOI: https://doi.org/10.1007/978-1-4613-0579-8_13
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