• Endoscopic radial artery harvesting for U-clip EC-IC bypass in the treatment of a giant petrous internal carotid artery aneurysm: technical case report. (biomedsearch.com)
  • A passage through the petrous part of the temporal bone that transmits the internal carotid artery. (dictionary.com)
  • If the anterior clinoid process of the lesser wing of the sphenoid bone is pneumatized, there might be a deep recess (infraoptic recess) in the superior and lateral corner of the sphenoid sinus (Figure, A & B). (1,2) Such a recess can clearly separate the optic nerve from the internal carotid artery (Figure, A & B). If the anterior clinoid process is not pneumatized, the optic nerve is sometimes difficult to identify. (thefreelibrary.com)
  • The internal carotid artery enters the carotid canal in the petrous portion of the temporal bone. (thefreelibrary.com)
  • Dr Jackler has authored over 150 peer reviewed papers, over 35 textbook chapters, numerous editorials, published three books Neurotology (1994, 2004), Atlas of Neurotology & Skull Base Surgery -(1996, 2008), and Tumors of the Ear and Temporal Bone - 2000). (stanford.edu)
  • By targeting the inner ear region of the petrous bone for extraction [Pinhasi et al. (gnxp.com)
  • For a human hand this is a very difficult proposition due to the extremely critical structures hidden in the petrous bone. (tue.nl)
  • Bone abnormalities (eg, brain atrophy, hyperostosis around the cerebral convexities, changes in the tuberculum sellae) may be seen incidentally on CT or plain x-rays. (merckmanuals.com)
  • High-resolution CT of the temporal bone revealed opacification of most of the right mastoid air cells. (ajnr.org)
  • The existence of air cells at the petrous apex, as well as fluid collection in the mastoid antrum detected by a postoperative CT scan, were possible risk factors for CSF leakage. (thejns.org)
  • 1) The posterosuperior cell tract connecting to the attic directly from the petrous apex, rather than through the mastoid antrum. (thejns.org)
  • Magnetic Resonance Imaging (MRI) was performed and showed a voluminous tumoural mass in the right mastoid with bone destruction. (eurorad.org)
  • Additional CT examination of the petrous bone showed a permeative destructive process in the right mastoid bone with invasion of the superior and posterior semicircular canals (Fig. 4). (eurorad.org)
  • During the Rinne test, a tuning fork is struck and placed on the mastoid bone behind the ear and the patient signals when he can no longer hear the tone. (hear.com)
  • In cases of normal hearing, the mastoid bone conduction sound is heard for half the amount of time as the second sound. (hear.com)
  • If a patient has conductive hearing loss, mastoid bone conduction sound is heard for a longer or equal amount of time than the second sound. (hear.com)
  • Pure-tone audiometry distinguishes thresholds between impaired bone and air conduction, and differentiates between sensorineural and labyrinthine hearing loss. (hear.com)
  • In other words, aid conduction requires a significantly louder tone to achieve a degree of perception comparable with bone conduction. (hear.com)
  • The difference comes from a number of small bones that fuse together during growth, such as the sacrum and coccyx of the vertebral column . (wikidoc.org)
  • The sacrum (the bone at the base of the spine ) consists of five bones which are separate at birth but fuse together into a solid structure in later years. (wikidoc.org)
  • The human skeleton consists of 208 bones, exclusive of the teeth, which are in reality parts of the digestive apparatus, and are developed from the mucous membrane . (chestofbooks.com)
  • the Kaiparowits Plateau in Utah contains fine details of bones , teeth , eggshells , and even tracks of Late Cretaceous dinosaurs and other animals? (thefullwiki.org)
  • Alveolar bone is the bone that surrounds the roots of the teeth forming bone sockets. (rug.nl)
  • Just above the inner angles of the eyebrows are two marked prominences called the superciliary ridges, at which points the two tables of the bone separate considerably, enclosing cavities called the frontal sinuses which communicate with the nasal passages. (chestofbooks.com)
  • A curved ridge traverses both frontal and parietal bones at each side, which marks the origin of the fibres of the temporal muscle , lying in a depression behind and below the ridge, called the temporal fossae. (chestofbooks.com)
  • The experimental use of flat-panel high-resolution CT in temporal bone specimens was evaluated with regard to position of electrode array and with special concern on documentation of the highest possible accuracy in cranial base navigation [ 3 , 6 , 7 ]. (hindawi.com)
  • The international team of researchers headed by Marcelo Sánchez-Villagra especially studied cranial formation and discovered that the individual cranial bones develop in different phases that are characteristic for the individual species. (eurekalert.org)
  • According to the study, which was published in the journal Nature communications , how the cranial bones develop in mammals also depends on brain size. (eurekalert.org)
  • As Daisuke Koyabu, now at University of Tokyo, who conducted the studies while he was a post-doc under Sánchez-Villagra, was able to demonstrate, the different bone types do not develop synchronously: Dermal cranial bones form before the endochondrals. (eurekalert.org)
  • There are 8 cranial bones, viz. (chestofbooks.com)
  • The influence of the place of residence, smoking and alcohol consumption on bone mineral content in the facial skeleton. (nih.gov)
  • The spectrum of temporal bone trauma is extremely varied, ranging from minor concussion without functional deficits to severe blunt or penetrating trauma with multifunctional deficits that involve the auditory and vestibular nerves, the facial nerve, and the intracranial contents. (medscape.com)
  • The clinical presentations specifically related to temporal bone trauma include facial nerve paralysis (partial or complete), hearing loss (conductive, sensorineural, or mixed), vertigo , dizziness , otorrhagia, cerebrospinal fluid (CSF) otorrhea , tympanic membrane perforation , and hemotympanum and canal laceration. (medscape.com)
  • Removal of the bone from over the enlarged proximal tympanic segment of the facial nerve revealed it to be filled with CSF. (ajnr.org)
  • Bone tissue (osseous tissue) is a hard tissue , a type of dense connective tissue . (wikipedia.org)
  • One of the types of tissue that makes up bone is the mineralized osseous tissue , also called bone tissue, that gives it rigidity and a honeycomb-like three-dimensional internal structure. (thefullwiki.org)
  • The primary tissue of bone, osseous tissue , is a relatively hard and lightweight composite material , formed mostly of calcium phosphate in the chemical arrangement termed calcium hydroxylapatite (this is the osseous tissue that gives bones their rigidity). (thefullwiki.org)
  • Growing is usually completed between ages 13 and 18, at which time the epiphyseal plates of long bones close allowing no further growth. (wikidoc.org)
  • Further investigation of this region, aided by the use of cadaveric specimens, led to the identification of normal anatomic variability in the amount of fat in the substantia spongiosa of the petrous temporal bone. (avmi.net)
  • According to Sánchez-Villagra, this indicates that the individual bones form based on a precisely defined, coordinated schedule that is characteristic for every species of animal and enables conclusions to be drawn regarding their evolutionary relationships in the tree of animal life. (eurekalert.org)