A text-book of the diseases of the ear for students and practitioners . roup havetheir origin and insertion on the auricle•itself. They effect a change in the formof the auricle, but only to a slight tragicus, antitragicus, helicis majorand minor lie on the concave surface,the transversus and obliquus auriculaeon the convex surface. According toKilian, the external muscles of the eararise collectively from the platysma. The new criminal school of Italy, ofwhich Lombroso is at the head, con-siders the anomalies in the form of the ear as degenerative changes. Thisview is corroborated
A text-book of the diseases of the ear for students and practitioners . roup havetheir origin and insertion on the auricle•itself. They effect a change in the formof the auricle, but only to a slight tragicus, antitragicus, helicis majorand minor lie on the concave surface,the transversus and obliquus auriculaeon the convex surface. According toKilian, the external muscles of the eararise collectively from the platysma. The new criminal school of Italy, ofwhich Lombroso is at the head, con-siders the anomalies in the form of the ear as degenerative changes. Thisview is corroborated by the extensive investigations of Gradenigo (A. f. 0.,vol. xxx.), who generally found the most striking anomalies of conformationof the auricle among the insane and criminals. Karutz ( 0., 1897) foundthat the direct union of the lobule to the side of the head without an inter-vening fissure in ears projecting forwards, was most frequent in the lowerclasses (cp. G. Schwalbe, Das aussere Ohr in Bardelebens Handbuchder Anatomie des Menschen, Jena, Fischer, 1898).. Fig. 1.—Auricle. Helix ; b, Antihelix ; c, Tragus ;d, Antitragus ; e, Lobule;/, Concha ; g, Orifice of the externalmeatus. B. The External Auditory Canal (meatusacusticus externus). The external auditory canal is divided into the cartilagino-membranous and bony parts. (a) The Cartilagino-membranous Meatus. The cartilagino-membranous meatus is a tubular continuationof the auricle directed inwards (medially). This tube consists ofa cartilaginous channel, which is completed at its upper and backpart into a canal by a membranous plate connected with thelining membrane of the external auditory meatus. 1—2 DISEASES OF THE EAR The circumference of the cartilaginous channel (Fig. 2)appears greatest at its outer, lateral extremity, while mediallythe width of the cartilage decreases in such a manner that the inner extremity (b) appears as a/ a 4s, , 4 narrow, rounded point. The proportion of the cartilaginousto the memb
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectear, booksubjecteardi
