A text-book of the diseases of the ear and adjacent organs . ting muscle, which arises fromthe epicranial aponeurosis, and with itsfibres converging in a downward direction,attaches itself to the convex surface of theauricle; it draws the auricle upwards. 2. The attrahens a/iricnhc. which arises also from the epicranial aponeurosis infront of the auricle, above the zygomaticjarch. and has its place of attachmenton the crista helicis; it draws the auricle a little forwards and upwards. retrahens cmriculce, which arises behind the auricle on the mastoidprocess, consists of several fascicul
A text-book of the diseases of the ear and adjacent organs . ting muscle, which arises fromthe epicranial aponeurosis, and with itsfibres converging in a downward direction,attaches itself to the convex surface of theauricle; it draws the auricle upwards. 2. The attrahens a/iricnhc. which arises also from the epicranial aponeurosis infront of the auricle, above the zygomaticjarch. and has its place of attachmenton the crista helicis; it draws the auricle a little forwards and upwards. retrahens cmriculce, which arises behind the auricle on the mastoidprocess, consists of several fasciculi, and extends to the convex surface of theconcha ; it is intended to draw the auricle a little backwards. The secondgroup of muscles have their origin and place of attachment on the auricleitself. They effect an alteration in the form of the auricle, but only to aslight extent. The tragicus, antitragicus, helicis major and minor lie onthe concave surface, the tramsversus and obliquus auriculee on the convexsurface of the auricle.* B. The External Meati Fig. 1.—, Helix ; b, Antihelix ; c, Tragus ; (/,Antitragus; e, Lobulus : f, Concha : </, Orifice of the external meatus. The external meatus is divided into two portions, viz., the cartilaginous and the osseous. * The new criminalistic school of Italy, of which Lombroso is at the head, con-sider the anomalies in the form of the ear as degenerative changes. Support is foundfor this View by the extensive investigations lately made by Gradenigo (A. f. O., ), in which he found the anomalies of conformation of the auricle most frequentamong the insane and CARTILAGINOUS MEATUS. a. Its Cartilaginous cartilaginous meatus is a tubular continuation of the auricledirected inwards. This canal, however, is not cartilaginous in its whole extent, but consists of acartilaginous channel, which isformed at its upper and backpart into a tube by a membranouslayer connected with the liningmembrane of
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Keywords: ., bookcentury1800, bookdecade1890, booksubjecteardiseases, bookyear
