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An attempt at a functional analysis of the brain is made in this brief monograph. Müller recognizes three principal subdivisions of the nervous system: (1) systema nervosum pro mundo, the division that receives stimuli from and reacts on the environment; (2) Systema nervosum myostaticum, receiving impulses from the vestibular labyrinth and from the muscle joints and tendons and sending impulses to the muscles for the maintenance of equilibrium, posture and tonus; (3) Systema nervosum vitale, concerned with the afferent and efferent innervation of the viscera, blood vessels, glands and the smooth muscle of the hair follicles. On the afferent side these divisions include, respectively, Sherrington's exteroceptive, proprioceptive and interoceptive sensory fibers and their nuclei of reception. On the efferent side, Müller's divisions 1 and 2 include the somatic motor elements, and division 3 the visceral efferent elements. An adequate discussion of the relation of the higher centers in the brain
Die Einteilung des Nervensystems nach seinen Leistungen.. JAMA. 1933;100(17):1364. doi:10.1001/jama.1933.02740170062037