Abstract
The organization of ascending spinal cord pathways concerned with somatosensory mechanisms is not the same for all mammals. In particular there are differences in the development of the spinocervical and spinothalamic tracts, and also subtle variations in the dorsal column system. Furthermore, the types, proportions and axonal conduction velocities of cutaneous afferent units vary according to species (see chapters 2, 3 and 4). It is obvious, therefore, that extreme caution should be exercised in 1) extrapolating results obtained from one species to another, particularly to man, 2) equating the functions of similar anatomical systems in different species, and 3) equating the functions of differently located ascending systems in different species, e. g. the spinocervical tract of carnivores with the spinothalamic tract of primates.KeywordsDorsal HornDorsal ColumnSpinal PathwaySpinothalamic TractActa PhysiolThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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