Morris's human anatomy : a complete systematic treatise by English and American authors / ed. by C.M. Jackson eleven hundred and eighty two illustrations, three hundred and fifty eight printed in colors.

  • Sir Henry Morris, 1st Baronet
Date:
[1914]
Catalogue details

Licence: Public Domain Mark

Credit: Morris's human anatomy : a complete systematic treatise by English and American authors / ed. by C.M. Jackson eleven hundred and eighty two illustrations, three hundred and fifty eight printed in colors. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    into canals by the overlying tympanic plate. The lower is the groove for the Eustachian tube [semicanalis tubse auditivse], the communicating passage between the tympanum and the pharynx; the upper is the semicanalis m. tensoris tympani, and the lateral apertures of both canals are visible in the retiring angle, b-etween the petrous and squamous portions of the bone. The apex of the pyramid is truncated and presents the medial opening of the carotid canal. The latter commences on the inferior surface, and, after ascending for a short distance, turns forward and medially, tunnelling the bone as far as the apex, and finally opens into the upper part of the foramen lacerum formed between the temporal and sphenoid bones. One or two minute openings in the wall of the carotid canal, known as the carotico-tympanic canaliculi, transmit communicating twigs between the carotid and tympanic plexuses. The upper part of the apex is joined by cartilage to the posterior petrosal process of the sphenoid. The base is the part of the pyramid which appears laterally at the side of the cranium and takes part in the formation of the mastoid portion. It is described with that chvision of the bone. Fig. 95.—The Left Temporal Bone. (Inferior view.) Carotid canal- Tensor tympani Levator veil palatini' Carotid canal Tympanic canaliculus Canalicul Mastoid canaliculus Jugular fossa Jugular surface Zygomatic process Masseter Articular tubercle Mandibular fossa ■Petro-tympanic fissure Tympanic plate Styloid process Stylo-pharyngeus Tympano-mastoid fissure Stylo-mastoid foramen Mastoid process Digastric Occipital groove Angles.—The superior angle (border) of the pyramid is the longest and separates the pos- terior from the anterior surface. It is grooved for the superior petrosal sinus, gives attachment to the tentorium cerebelli, and presents near the apex a semilunar notch upon which the fifth cranial nerve lies. Near its medial end there is often a small projection for the attachment of the petro-sphenoid.al ligament, which arches over the inferior petrosal sinus and the sixth nerve. The posterior angle separates the posterior from the inferior surface, and when ar- ticulated with the occipital, forms the groove for the inferior petrosal sinus, and completes the jugular foramen formed by the temporal in front and on the lateral side, and by the occipital behind and on the medial side. The jugular foramen is divisible into three compartments: an anterior for the inferior petrosal sinus, a middle for the glossopharyngeal, vagus and accessory cranial nerves, and a posterior for the internal jugular vein and some meningeal branches from the occipital and ascending pharyngeal arteries. The anterior angle is the shortest and consists of two parts, one joined to the squamous in the petro-squamous suture and a small free part internally which articulates with the sphenoid. A fourth or inferior border may be distinguished, which runs along the line of junction with the tympanic plate and is continued on to the rough area below the apex.
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