A text-book of physiology for medical students and physicians . ense is relatively The peripheral end-organ of smell consists of the olfactory epithelium in the upperportion of the nasal chambers. The physiology of this organ willbe considered in the section on special senses. The epithelialcells of which it consists are comparable to bipolar ganglioncells. The processes or hairs that project into the nasal chamber * Flechsig, Localisation der geistigen Vorgrange, Leipzig, 1896. t See Barker, The Nervous System, 1899, for references to literature. SENSE AREAS AND ASSOCIATION AREA
A text-book of physiology for medical students and physicians . ense is relatively The peripheral end-organ of smell consists of the olfactory epithelium in the upperportion of the nasal chambers. The physiology of this organ willbe considered in the section on special senses. The epithelialcells of which it consists are comparable to bipolar ganglioncells. The processes or hairs that project into the nasal chamber * Flechsig, Localisation der geistigen Vorgrange, Leipzig, 1896. t See Barker, The Nervous System, 1899, for references to literature. SENSE AREAS AND ASSOCIATION AREAS 215 are acted upon by the olfactory stimuli, and the impulses thusaroused are conveyed by the basal processes of the cells, the olfac-tory fibers, through the cribriform plate of the ethmoid bone intothe olfactory bulb. The Olfactory Bulb and its Connections.—The olfactorybulbs are outgrowths from and portions of the cerebral hemi-spheres. Each bulb is connected with the cerebral hemispheresby its olfactory tract. The connections established by the fibers. Fig. 96.—Diagram of the central course of the olfactory fibers: /, Olfactory bulb;II, olfactory tract; ///, cortex of the hippocampal lobe (gyrus uncinatus); IV, anteriorcommissure, olfactory portion; A, olfactory epithelial cells of nose (their fibers, olfactorynerve fibers, terminate in the glomeruli of the bulb); B, glomeruli of olfactory bulb wherethe olfactory fibers come in contact with the dendrites of the mitral cells; C, mitral andbrush cells; 1, 2, 3, axons from the mitral cells constituting the fibers of the Fibers 3, which enter the commissure, arise, according to some observers, fromcells in the olfactory lobe near the base of the tract. of this tract are widespread, complicated, and in part incom-pletely known. All those portions of the brain connected with thesense of smell are sometimes grouped together as the rhinenceph-alon. According to von Kolliker, the parts included under thisdesig
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Keywords: ., bookautho, bookcentury1900, bookdecade1910, booksubjectphysiology
