نتایج جستجو برای: ossicle
تعداد نتایج: 437 فیلتر نتایج به سال:
The aim of our study was to determine the prevalence and anatomical variations posterolateral tubercle talus in relation sex on CT imaging. A total 1478 ankle scans retrospectively reviewed for different variants talus, type size os trigonum. Normal sized lateral found 46.1 %, an enlarged (Stiedaâ??s process) 26.1 trigonum 20.5 % almost absent 7.3 %. statistically higher Stiedaâ??s process male...
The effects of a conductive or mixed (conductive and sensorineural) hearing loss on anatomical and physiological properties of the chicken auditory system were examined. Animals used in the anatomical studies underwent either a columella (ossicle) removal, which produced a moderate conductive hearing loss, or an oval window puncture, which produced a severe mixed hearing loss, at 4 days posthat...
Drug targeting of adult stem cells has been proposed as a strategy for regenerative medicine, but very few drugs are known to target stem cell populations in vivo. Mesenchymal stem/progenitor cells (MSCs) are a multipotent population of cells that can differentiate into muscle, bone, fat, and other cell types in context-specific manners. Bortezomib (Bzb) is a clinically available proteasome inh...
Os odontoideum is a rare atlantoaxial abnormality that affects the odontoid process. It has been proposed to be a congenital anomaly due to lack of chondral tissue or failed ossification along the growth line of the proatlas and the first spinal sclerotome, which are the precursors for the future odontoid process [1]. Some authors have argued against this theory and believe that os odontoideum ...
This paper presents the results of non-contact measurements of the human ear round window (RW) membrane motion in freshly harvested human cadaver temporal bone specimens. A PSV 400 Scanning Laser Vibrometer system (Polytec, Waldbronn, Germany) was used to determine the effect of stapedotomy on the sound-induced displacement amplitude of the RW membrane. The vibration patterns were measured in t...
Os calcaneus secundarius is one of several accessory ossicles of the foot that have been identified as normal variants of skeletal development. It may cause ankle pain and may mimic an avulsion fracture of the anterior calcaneal process. A twenty-year-old male was admitted to our institution with right ankle pain following an inversion injury. An axial CT image of the patient's right ankle reve...
PURPOSE To determine CT findings in the external, middle, and inner ear of patients with microtia and external auditory canal dysplasia. METHODS We used high-resolution CT, with multiplanar or axial 1-mm continuous sections, coronal or sagittal reformations, or low-dose spiral acquisitions, to examine 184 temporal bones of children with microtia. RESULTS In cases of minor microtia, auditory...
The accessory navicular is occasionally the source of pain and local tenderness over the instep. If conservative measures fail, surgical treatment may be required and the results of 62 operations to one or both feet in 47 patients are reported. Twenty-six patients were treated by the Kidner operation, in which the main insertion of the tibialis posterior is re-routed; in the remaining 21 the os...
Os odontoideum is a rare atlantoaxial abnormality that affects the odontoid process. It has been proposed to be a congenital anomaly due to lack of chondral tissue or failed ossification along the growth line of the proatlas and the first spinal sclerotome, which are the precursors for the future odontoid process [1]. Some authors have argued against this theory and believe that os odontoideum ...
CHARGE syndrome is a rare human disorder caused by mutations in the gene encoding chromodomain helicase DNA binding protein 7 (CHD7). Characteristics of CHARGE are varied and include developmental ear and hearing anomalies. Here we report a novel mouse model of CHD7 dysfunction, termed Looper. The Looper strain harbours a nonsense mutation (c.5690C>A, p.S1897X) within the Chd7 gene. Looper mice...
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