. Cunningham's Text-book of anatomy. Anatomy. TYMPANIC CAVITY OR MIDDLE EAE. 833 of the stapes, surrounded by its ligamentum annulare. (3) An elevation, the pro- minentia canalis facialis, which is situated above the fenestra^ vestibuli, in the recessus epityrnpanicus; this elevation indicates the position of the upper part of the canalis facialis ( aqueduct of Fallopius), which contains the facial nerve, and Recessus epitympanicu Prominentia canalis facialis Tegmen tynipa Fenestra vestibuli Semicanal for tensor tympani Septum canalis musculotubarn, — Promontory with grooves for tympanic p
. Cunningham's Text-book of anatomy. Anatomy. TYMPANIC CAVITY OR MIDDLE EAE. 833 of the stapes, surrounded by its ligamentum annulare. (3) An elevation, the pro- minentia canalis facialis, which is situated above the fenestra^ vestibuli, in the recessus epityrnpanicus; this elevation indicates the position of the upper part of the canalis facialis ( aqueduct of Fallopius), which contains the facial nerve, and Recessus epitympanicu Prominentia canalis facialis Tegmen tynipa Fenestra vestibuli Semicanal for tensor tympani Septum canalis musculotubarn, — Promontory with grooves for tympanic plexus Osseous part of auditory tube Bristle introduced into the foramen for the tympanic nerve. Sinus tympani Mastoid air-cells Recessus epityrnpanicus Fenestra cochlea; Course of canalis facialis Fig. 709.—Section through Left Temporal Bone, showing labyriuthic wall of tympanic cavity, etc. is continued backwards and downwards behind the tympanic cavity, to end at the stylo-mastoid foramen. (4) The septum canalis musculotubarii ( processus cochleariformis), which extends backwards, above the anterior end of the fenestra vestibuli, where it makes a sharp lateral curve, and forms a pulley over which the tendon of the tensor tympani muscle plays. (5) A funnel-shaped recess, situated behind and below the promontory, and almost hidden by its overhanging edge, leads to an irregularly oval opening, termed the fenestra cochleae; in the macerated bone this fenestra communicates with the cochlea, but in the recent state is closed by the membrana tympani secundaria; this membrane is bent angularly along a line joining its anteroinferior two-thirds with the postero-superior third; and consists of three layers : (a) lateral, continuous with the mucous lining of the tym- panum, and con- taining a network of capillaries ; (b) intermediate, or membrana propria, the fibres of which radiate chiefly towards the peri- phery of the mem- brane — some branched, dendritic fibres are also pr
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1914
