Spatial Innervation Patterns of Single Vestibulospinal Axons in Neck Motor Nuclei
Spatial Innervation Patterns of Single Vestibulospinal Axons in Neck Motor Nuclei
Eye and head position control is an ideal paradigm for studying how central nervous system mechanisms interact to stabilize a multidimensional motor system. Head movement signals detected by the semicircular canals are mediated through vestibulo-ocular and vestibulocollic pathways that line each of the three semicircular canals to a set of eye and head muscles. For tasks needing compensatory eye and head movements, the central nervous system will program muscles to respond in particular combinations rather than to generate an infinite variety of muscle contraction patterns. Single unit recording in animals engaging in motor behavior made it possible to analyze temporal and quantitative aspects of neuronal activities in different parts of the CNS with regard to various movement parameters.
Keywords: position control, central nervous system, muscle contraction, head muscles, motor behavior, compensatory eye movement, vestibulocollic pathways
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