Chaurasia anatomy volume 2 pdf

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Torrentz will always love you. The squamous part is the largest and most superiorly positioned relative to the rest of the bone. Posteroinferior to the squamous is the mastoid part. It separates occipital bone and chaurasia anatomy volume 2 pdf portion of temporal bone.

It separates parietal bone and squama portion of temporal bone. It separates sphenoid bone and squama portion of temporal bone. It separates zygomatic bone and zygomatic process of temporal bone. The squama is ossified in membrane from a single nucleus, which appears near the root of the zygomatic process about the second month. The petromastoid part is developed from four centers, which make their appearance in the cartilaginous ear capsule about the fifth or sixth month. This ring expands to form the tympanic part, and is ossified in membrane from a single center which appears about the third month.

This extension does not, however, take place at an equal rate all around the circumference of the ring, but occurs more at its anterior and posterior portions. As these outgrowths meet, they create a foramen in the floor of the meatus, the foramen of Huschke. This foramen is usually closed about the fifth year, but may persist throughout life. The part of the squama which forms the fossa lies at first below the level of the zygomatic process. The mastoid portion is at first flat, with the stylomastoid foramen and rudimentary styloid immediately behind the tympanic ring.

With air cell development, the outer part of the mastoid component grows anteroinferiorly to form the mastoid process, with the styloid and stylomastoid foramen now on the under surface. The descent of the foramen is accompanied by a requisite lengthening of the facial canal. Outer surface of petromastoid part. Outer surface of tympanic ring. The auditory bulla is homologous with the tympanic part of the temporal bone. Its exact etymology is unknown.

Temporal bones are situated on the sides of the skull, where grey hairs usually appear early on. Or it may relate to the pulsations of the underlying superficial temporal artery, marking the time we have left here. The skull is thin in this area and presents a vulnerable area for a blow from a battle axe. A glomus jugulare tumor is a tumor of the part of the temporal bone in the skull that involves the middle and inner ear structures. This tumor can affect the ear, upper neck, base of the skull, and the surrounding blood vessels and nerves. A glomus jugulare tumor grows in the temporal bone of the skull, in an area called the jugular foramen. The jugular foramen is also where the jugular vein and several important nerves exit the skull.