Vascularization of the endochondral layer with respect to the otic capsule

1979 ◽  
Vol 105 (3) ◽  
pp. 233-241 ◽  
Author(s):  
Alexander Rauchfuss
Keyword(s):  
Otic Capsule ◽  
Endochondral Layer

scholarly journals Tomographic diagnosis and relevant aspects of otosclerosis

2013 ◽  
Vol 46 (5) ◽  
pp. 307-312 ◽  
Author(s):  
Juliana Oggioni Gaiotti ◽  
Natália Delage Gomes ◽  
Ana Maria Doffémond Costa ◽  
Caroline Laurita Batista Couto Villela ◽  
Wanderval Moreira ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Hearing Loss ◽  
Differential Diagnosis ◽  
Multidetector Computed Tomography ◽  
Surgical Planning ◽  
Otic Capsule ◽  
Metabolic Derangement ◽  
Pictorial Essay ◽  
Temporal Bone Anatomy ◽  
Endochondral Layer

A literature review and pictorial essay were developed to discuss the importance of knowing the main findings and locations of otosclerosis at multidetector computed tomography (MDCT). The authors performed a retrospective review of cases of otosclerosis diagnosed in their institution by means of high resolution multidetector computed tomography. Otosclerosis corresponds to otic capsule dysplasia characterized by metabolic derangement of its endochondral layer. Such condition constitutes a relevant cause of sensorineural hearing loss, affecting about 7% to 10% of the general population. The diagnosis is usually clinical, but imaging methods play a significant role in the anatomical detailing, differential diagnosis, surgical planning and evaluation of postoperative complications. Among such methods, the relevance of MDCT is highlighted. Radiologists should be familiar with the MDCT findings of otosclerosis, as well as with the temporal bone anatomy to assist in the appropriate clinical management of this disease.

Etiopathogenesis of Otosclerosis: A Hypothesis

1984 ◽  
Vol 93 (1) ◽  
pp. 28-33 ◽  
Author(s):  
T. J. Yoo
Keyword(s):  
Experimental Data ◽  
Autoimmune Disease ◽  
Human Antibody ◽  
Otic Capsule ◽  
Type Ii ◽  
Endochondral Layer

It is hypothesized that otosclerosis is an autoimmune disease in response to native type II collagens of cartilage rests associated with globular ossei in the endochondral layer of the otic capsule. To support this hypothesis animal experimental data and human antibody data are shown.

Early ossification within the human fetal otic capsule: morphological and microanalytical findings

1989 ◽  
Vol 103 (12) ◽  
pp. 1113-1121
Author(s):  
F. Declau ◽  
W. Jacob ◽  
W. Dorrine ◽  
B. Appel ◽  
J. Marquet
Keyword(s):  
Human Fetus ◽  
Polarization Microscopy ◽  
Otic Capsule ◽  
Microchemical Analysis ◽  
Calcified Cartilage ◽  
Transmission Electron ◽  
Combined Use ◽  
Backscattered Electron ◽  
Electron Imaging ◽  
Endochondral Layer

AbstractBesides the use of conventional techniques such as light and polarization microscopy, the present paper proposes the combined use of transmission electron microscopy, secondary and backscattered electron imaging, energy dispersive X-ray analysis and computed tomography for the diagnostic evaluation of ear pathology in the human fetus. These methods were used to revisit the primary calcification front of the fetal otic capsule between 16 and 23 weeks gestational age. Ultramicroscopic evaluation demonstrates similar fetal bone formation to that found in other bones of the human fetus. The formation of the endosteal and periosteal layers is a typical example of early intra-membranous ossification. The enchondral layer is made up of fibrillar bone, laid down around the calcified cartilage remnants. Microchemical analysis indicates a significantly higher Ca/P ratio in the endochondral layer with respect to the endosteum and periosteum. The consequences of a lower Ca/P ratio in the endosteal layer are discussed in view of calcium homeostasis and inner ear function.

LXXX The Fissula Ante Fenestram of the Human Otic Capsule

1947 ◽  
Vol 56 (4) ◽  
pp. 957-985 ◽  
Author(s):  
Barry J. Anson ◽  
Earl W. Cauldwell ◽  
Theodore H. Bast
Keyword(s):  
Otic Capsule

Radiologic Comparison of Density of Mastoid Obliteration vs. Cortical Bone and Otic Capsule

2010 ◽  
Vol 120 (S4) ◽  
pp. S219-S219 ◽  
Author(s):  
RN Samy ◽  
NM Shoman ◽  
RS Cornelius ◽  
ML Pensak
Keyword(s):  
Cortical Bone ◽  
Otic Capsule ◽  
Mastoid Obliteration

EFFECTS OF DEXTRAN SULFATE ON BONE OF THE OTIC CAPSULE

1968 ◽  
Vol 78 (10) ◽  
pp. 1768-1776 ◽  
Author(s):  
Orozimbo A. Costa
Keyword(s):  
Dextran Sulfate ◽  
Otic Capsule

VII The Fissula Ante Fenestram of the Human Otic Capsule

1948 ◽  
Vol 57 (1) ◽  
pp. 103-128 ◽  
Author(s):  
Barry J. Anson ◽  
Earl W. Cauldwell ◽  
Theodore H. Bast
Keyword(s):  
Otic Capsule

Anatomical Characteristics of Facial Nerve and Cochlea Interaction

2017 ◽  
Vol 22 (1) ◽  
pp. 41-49 ◽  
Author(s):  
Nadine Schart-Morén ◽  
Sune Larsson ◽  
Helge Rask-Andersen ◽  
Hao Li
Keyword(s):  
Facial Nerve ◽  
Semicircular Canal ◽  
Otic Capsule ◽  
Micro Ct ◽  
Superior Semicircular Canal Dehiscence ◽  
Topographic Anatomy ◽  
3D Rendering ◽  
Superior Semicircular Canal ◽  
Archival Collection ◽  
Temporal Bones

Objective: The aim was to study the relationship between the labyrinthine portion (LP) of the facial canal and the cochlea in human inner ear molds and temporal bones using micro-CT and 3D rendering. A reduced cochlea-facial distance may spread electric currents from the cochlear implant to the LP and cause facial nerve stimulation. Influencing factors may be the topographic anatomy and otic capsule properties. Methods: An archival collection of human temporal bones underwent micro-CT and 3D reconstruction. In addition, cochlea-facial distance was assessed in silicone and polyester resin molds, and the association between the LP and upper basal turn of the cochlea was analyzed. Results: Local thinning of the otic capsule and local anatomy may explain the development of cochlea-facial dehiscence, which was found in 1.4%. A reduced cochlea-facial distance was noted in 1 bone with a superior semicircular canal dehiscence but not in bones with superior semicircular canal “blue line.” The otic capsule often impinged upon the LP and caused narrowing. Conclusion: Micro-CT with 3D rendering offers new possibilities to study the topographic anatomy of the human temporal bone. The varied shape of the cross-section of the LP could often be explained by an “intruding” cochlea.

Distribution of Bone Remodeling Units in the Otic Capsule of the Rabbit: a Semiquantitative Morphometric Study

1992 ◽  
Vol 112 (3) ◽  
pp. 462-469 ◽  
Author(s):  
M. Sølvsten Sørensen ◽  
M. Balslev Jørgensen ◽  
P. Bretlau
Keyword(s):  
Bone Remodeling ◽  
Morphometric Study ◽  
Otic Capsule
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