[ adjective ] of a nerve fiber or impulse originating outside and passing toward the central nervous system
Used in print(Nathan Rapport, ""I've Been Here before!"...)
A `` mental_image '' subconsciously impressing us from beneath its language symbols in wakeful thought , or consciously in light sleep , is actually not an image at_all but is comprised of realities , viewed not in the concurrent sensory stream , but within the depths of the fourth_dimension .
Hereby , the external object viewed by the eyes remains the thing that is seen , not the retinal image , the purpose of which would be to achieve perceptive cooperation by stirring sympathetic impulses in the other sensory centers , motor tensions , associated word symbols , and consciousness .
Consciousness is the factor that provides the progressive continuity to sensory impressions .(E. Gellhorn, "Prolegomena to a theory of the emotions"...)
Moreover , the dominance in parasympathetic action ( with reciprocal inhibition of the sympathetic ) at the hypothalamic level induces , by its peripheral action , the autonomic symptoms of sleep and , by its action on the cortex , a lessening in the reactivity of the sensory and motor apparatus of the somatic nervous_system .