. Quain's elements of anatomy . in from a bony prominence which projects fiom the margin ofthe external meatus into the tympanum, and forms the anterior boundaryof the notch of Eivini. This prominence is known as the larger spinousjsrocess of the tympanum (spina tympanica major) (fig. 381, sjy) todistinguish it from another bony prominence or spine at the posteriorextremity of the notch. Accessory anterior ligament.—A comparatively stout sheatli surrounds thetendon of the tensor tympani as it passes from the end of the coclileariformprocess to the malleus, and a flat ligamentous band with a th
. Quain's elements of anatomy . in from a bony prominence which projects fiom the margin ofthe external meatus into the tympanum, and forms the anterior boundaryof the notch of Eivini. This prominence is known as the larger spinousjsrocess of the tympanum (spina tympanica major) (fig. 381, sjy) todistinguish it from another bony prominence or spine at the posteriorextremity of the notch. Accessory anterior ligament.—A comparatively stout sheatli surrounds thetendon of the tensor tympani as it passes from the end of the coclileariformprocess to the malleus, and a flat ligamentous band with a thickened margin(fig. 381, Z), which lies along the anterior border of this sheath, stretching betweenthe anterior wall of the tympanum and the upper part of the manubrium andneck of the malleus may be regarded as assisting in the fixation of the malleusanteriorly (). The external ligament of the malleus (fig. 381, ), is a fan-shapedligamentous structure, the fibres of which arise from the margin of the 442 TKE notcli of Eivini, and converge to the short process find adjacent partof the body of the malleus. The posterior bundle of fibres of this Kgament together vrith. the anteriorbundle of the anterior ligament are termed by Helmholtz the axis-ligament ofthe malleus, since thej are attached nearly in the axis of rotation of that bone. rig. 3S1. Yis. 3S1.—TiEw of the CATlir OF THE TT3r-PAXUJI, OPEXED FROMABOVE. (ilAGXIFrEI> FOCR TI3IE3.) (E. A. S.) m, head of tie malleus ;sp. spina tympanica ina]or;I. a. m, anterior Hgamentof the maUeus ; I. e. m,external ligament of themalleus ; H, gap bet-n-eenthe tvro hgaments leadingto the merobrana faccidaand notch of Eivini; i,body of the incus ; I. i,posterior ligament of theincus: jir. o, processus orbicularis of the incus seen in the depth of the cavity, articulated■with the head of the stapes, -sf ; st, tendon of the stapedius muscle emerging from thepyramid ; it, tendon of the tensor tympani, emerging from th
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