. Cunningham's Text-book of anatomy. Anatomy. Auditory tube Retro-pharyngeal lymph gland "* J Internal carotid artery Internal jugular vein Tranverse sinus \ Posterior fossa of skull Rudimentary mastoid process Facial nerve Pyramid Section of jugular fossa Fig. 1072. Promontory View of the Labyrinthine Wall of the Middle Ear. Section through the left temporal bone of a child, to show the relations of the tympanum and tympanic antrum to the middle and posterior fossae of the skull. straighten the cartilaginous part of the canal. The healthy membrane is pearly gray, semi- opaque, slightly c
. Cunningham's Text-book of anatomy. Anatomy. Auditory tube Retro-pharyngeal lymph gland "* J Internal carotid artery Internal jugular vein Tranverse sinus \ Posterior fossa of skull Rudimentary mastoid process Facial nerve Pyramid Section of jugular fossa Fig. 1072. Promontory View of the Labyrinthine Wall of the Middle Ear. Section through the left temporal bone of a child, to show the relations of the tympanum and tympanic antrum to the middle and posterior fossae of the skull. straighten the cartilaginous part of the canal. The healthy membrane is pearly gray, semi- opaque, slightly concave outwards, and obliquely placed, being inclined laterally, especially above and behind. The handle and short process of the malleus, both embedded in the membrana tympani, are the only objects distinctly seen when the healthy ear is examined with the speculum. Groove for posterior branch of middle meningeal artery Aditus ad antrum Mastoid antrum -W'-^. Transverse sinus- -V-' Incus. Middle cranial fossa Tegmen tympani Tympanic attic ^.Chorda tympani nerve ^.Tensor tympani muscle L - Handle of malleus ^-Carotid canal Tympanic membrane "_ Jugular fossa .Styloid process Mastoid process [ Stylo-mastoid foramen Fig. 1073.—Section through Left Temporal Bone, showing Tympanic Wall of Tympanic Cavity, etc. The short process of the malleus projects laterally, and presents itself, therefore, as a distinct knob-like projection at the superior part of the membrane; passing forwards and backwards from this process are the anterior and posterior folds of the membrana tympani; they form the lower limit of Shrapnell's membrane, and correspond to the line of the chorda tympani nerve. The handle of the malleus, situated at the junction of tbe two upper quadrants, is seen passing downwards and backwards to tbe point of maximum. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1914
