A manual of anatomy . anch of the internal max-illary artery and also lodges the anterior process of malleus. Nearthis is a canaliculus that transmits the chorda tympani nerve. Thatportion of the mandibular fossa behind the fissure is nonarticularand lodges a portion of the parotid gland (which becomes enlargedin mumps and causes the pain when the mandible is lowered). Theanterior part is articular and with the articular tubercle and thecondyle of the mandible forms the temperomandibular articulation;this contains an interarticular fibrocartilage. The posteroinjeriorsurface of the squamosa for
A manual of anatomy . anch of the internal max-illary artery and also lodges the anterior process of malleus. Nearthis is a canaliculus that transmits the chorda tympani nerve. Thatportion of the mandibular fossa behind the fissure is nonarticularand lodges a portion of the parotid gland (which becomes enlargedin mumps and causes the pain when the mandible is lowered). Theanterior part is articular and with the articular tubercle and thecondyle of the mandible forms the temperomandibular articulation;this contains an interarticular fibrocartilage. The posteroinjeriorsurface of the squamosa forms a part of the posterior wall of the ex-ternal auditory canal The superior margin is convex and beveledat expense of the cerebral surface. The posterior^ inferior and medial Parietal border Groove for middle temporal artery Temporal line Parietal notchStipramrntal spin Squamous portion (temporal surface) Sphenoidal border Mastoid foramen Occipital border(mastoid portion) Mastoid portionMastoid process. Articular eminence Glenoid fossa Vaginal Petrotympanic flssureprocess Tympanic si,loid pr,e„3portion ILxiernal auditory meatus Frc. 28.—The rifiht temporal bone seen from the outer (lateral) surface. {Sobotta and McMurrich.) margins of the squama are fused with the petrous part. Inferiorlyand in front is the petrotympanic fissure separating it from the cor-responding part of the bone. The tympanic portion (pars tympanica) forms the posterior partof tlie mandibular fossa, the anterior and inferior walls and a partof the posterior wall of the external auditory canal. Its lower edgeembraces the styloid process as the vaginal process. Although fusedwith the other parts of the bone it is separated, laterally, from themastoid and squamous divisions by the tympanomastoid fissure. Tothat part bounding the canal the cartilaginous portion of the externalear is attached. The external auditory canal (meatus auditorius externus) is slightlycurved, oval on section and twis
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecthumananatomy, bookyea
