A text-book of the diseases of the ear for students and practitioners . nal to the sulcus spiralis lies Cortis organ proper (Fig. 317). This * Katz, Histologisches ilber den Schneckencanal, spec, die Stria vascularis(Verhandl. des X. internat. med. Congress, Berlin, 1890). 694 DISEASES OF THE EAR consists of an inner (C) and an outer (C) row of gently curved rods (Cortisfibres), the lower extremities of which rest upon the basilar membrane, whiletheir upper ends articulate with each other. The two rows form the tunnel ofCortis organ (zona arcuata) ; the inner are broader than the outer, so tha
A text-book of the diseases of the ear for students and practitioners . nal to the sulcus spiralis lies Cortis organ proper (Fig. 317). This * Katz, Histologisches ilber den Schneckencanal, spec, die Stria vascularis(Verhandl. des X. internat. med. Congress, Berlin, 1890). 694 DISEASES OF THE EAR consists of an inner (C) and an outer (C) row of gently curved rods (Cortisfibres), the lower extremities of which rest upon the basilar membrane, whiletheir upper ends articulate with each other. The two rows form the tunnel ofCortis organ (zona arcuata) ; the inner are broader than the outer, so thatwe find two of the former to three of the latter. In the lower angle, formedby the rods and basilar membrane, two rows of round, nucleated cells (basilarcells) are found. The outer row of rods has a plate-shaped process at its upper extremity,to which a net-like perforated membrane, the lamina reticularis (r), is attachedThis roofs over the external rods and the so-called Cortis cells, or externalhair-cells (ah). The latter structures (Z) (Ketzius), which in man are. Fig. 315.—Section of the Osseous and Membranous Semicircular Canals. Osseous semicircular canal ; b, Place of attachment of the membranous semi-circular canal; c, Globular elevations on the inner surface of the membranoussemicircular canal ; d. Vascular connective-tissue bands. arranged in three, four, in rare cases five, parallel rows (Gottstein), are sur-rounded by the terminal fibres of the acoustic nerve, in the form of a net-work ; they are attached to the basilar membrane by their delicate, elongatedinferior extremities (Gottsteins basilar process), while their upper, wider endsare covered with auditory hairs, which project through the openings of thelamina reticularis. A row of inner hair-cells (ill) is found in front of the sulcusspiralis internus immediately anterior to the inner rods of Cortis to H. Joseph (Anatom. Hefte, vol. xiv.), peculiar hornified bodies(PfeilerkojjfeinscJdilsse, J
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