Abstract:
:The cochlea of the inner ear is no longer regarded exclusively as a passive mechanical signal analyser. Active mechanical processes are thought to influence the vibration pattern of the basilar membrane. The source of these active mechanical processes is sought in the outer hair cells (OHC). These auditory sensory cells contain actin and actin-associated structural elements. Recently, isolated OHC have been demonstrated to be capable of reversible longitudinal contractions in vitro, whose molecular mechanism could not be documented, however. Furthermore, following an increase in the intracellular Ca2+ level, isolated OHC showed longitudinal motile responses in the presence of ATP. We now report that the observed Ca2+/ATP induced mechanical events in OHC are active processes, that are driven by the hydrolytic energy of ATP. Moreover, motile responses are frequently associated with a movement of the cuticular plate, including the stereociliary bundle. Cytochalasin B, inorganic bisphosphate, trifluoperazine and antiactin inhibit the motile response. Thus, our results show that outer hair cells possess actin-dependent Ca2+ and calmodulin-controlled motor properties, so that potentially they can actively adjust the mechanical properties of the basilar membrane during auditory stimulation.
journal_name
Acta Otolaryngoljournal_title
Acta oto-laryngologicaauthors
Zenner HPdoi
10.3109/00016488809119443subject
Has Abstractpub_date
1988-01-01 00:00:00pages
39-44issue
1-2eissn
0001-6489issn
1651-2251journal_volume
105pub_type
杂志文章abstract:CONCLUSIONS:The expression of phosphorylcholine (ChoP) in the surface of nontypeable Haemophilus influenzae (NTHi) is an important factor in the pathogenesis of persistent otitis media with effusion (OME) in humans. OBJECTIVES:Lipooligosaccharide (LOS) in NTHi undergoes phase variation in expression of the ChoP epitop...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.1080/00016480802468195
更新日期:2009-08-01 00:00:00
abstract::Angioneurotic edema is a non-pitting edema which is usually limited to the skin and the mucous membranes of the face and upper aerodigestive tract. The risk of acute upper airway obstruction makes angioneurotic edema a concern for emergency room physicians, internists and otolaryngologists because prompt recognition o...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.1080/00016480310005129
更新日期:2003-10-01 00:00:00
abstract:CONCLUSION:Endolymphatic hydrops could be a reversible inner ear pathological condition. After sac surgery, hydrops was reduced and symptoms went into remission in some cases, although vertigo suppression was not always a result of the reduced hydrops. OBJECTIVE:To examine the changes in endolymphatic hydrops detected...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016489.2013.795290
更新日期:2013-09-01 00:00:00
abstract:OBJECTIVES:This study was conducted to demonstrate the safety and efficacy of the Otologics Middle Ear Transducer (MET) Ossicular Stimulator and, in particular, to compare the audiologic benefits of this novel form of electromechanical stimulation with those of conventional acoustical amplification. MATERIAL AND METHO...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章,多中心研究
doi:10.1080/00016480410016298
更新日期:2004-05-01 00:00:00
abstract:CONCLUSIONS:In order to confirm these preliminary results, a prospective double-blind study has been instituted in Padova University ENT Section to compare the efficacy of sulphurous-arsenical-ferruginous thermal water nasal irrigations vs isotonic sodium chloride solution nasal irrigations after functional endoscopic ...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.1080/00016480600951525
更新日期:2007-06-01 00:00:00
abstract::Central origin of the vidian nerve in the dog was investigated using the retrograde tracing technique of horseradish peroxidase (HRP). After HRP was applied to the vidian nerve, labelled neurons were found in the medulla oblongata and the geniculate ganglion but could not be found in the trigeminal ganglion. Labelled ...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016488309132883
更新日期:1983-07-01 00:00:00
abstract:BACKGROUND:Li quick repositioning maneuver for treatment of geotropic horizontal canal benign paroxysmal positional vertigo (HC-BPPV) was reported in the literature. OBJECTIVE:The aim of this study is to observe the clinical efficacy of the Li quick repositioning maneuver for the treatment of geotropic HC-BPPV. METHO...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章,随机对照试验
doi:10.1080/00016489.2018.1476778
更新日期:2018-09-01 00:00:00
abstract::Metal intoxication (mercury and arsenic) in guinea pigs may cause damage to labyrinthine blood vessels by swelling of the endothelial cells, mitochondrial disintegration and sometimes protrusion of endothelial cell cytoplasm herniating into the blood vessel lumen. Chronic mercury intoxication resulted in distorted end...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016487709128869
更新日期:1977-05-01 00:00:00
abstract:CONCLUSION:Neck dissection (ND) may not be warranted for those patients with complete response in the neck. Human papillomavirus (HPV)-positive or -negative tumour does not affect this recommendation. OBJECTIVES:Treatment of tonsillar cancer varies considerably worldwide, although non-surgical treatment, e.g. radiothe...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016489.2014.920516
更新日期:2014-10-01 00:00:00
abstract:CONCLUSIONS:We conclude that the capsaicin inhalation test is useful to directly assess cough reflex and sensation around the larynx, while it indirectly reflects central nervous system function. OBJECTIVES:To understand the state of the cough reflex before patients with dysphagia start eating. METHODS:We studied the...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016489.2010.516013
更新日期:2011-01-01 00:00:00
abstract:CONCLUSIONS:The findings of this study demonstrated that the wait-and-watch strategy for neck metastasis from squamous cell carcinoma (SCC) of oral tongue is a reliable option and that salvage by surgical treatment is effective. However, younger patients should be closely monitored for recurrence. Adjuvant therapy may ...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016489.2012.748988
更新日期:2013-05-01 00:00:00
abstract::The trachea whole organ perfusion technique was used to study the effect of tumor necrosis factor alpha (TNF alpha) and interleukin-1 alpha (IL-1 alpha) on the adherence of otitis media pathogen Streptococcus pneumoniae (Spn) type 6A. Tracheas were removed from chinchillas and divided equally. One-half trachea was act...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.1080/00016489950181981
更新日期:1999-01-01 00:00:00
abstract:CONCLUSION:Each of eight patients with bilateral microtia and atresia underwent bilateral reconstruction of the auricles and external auditory canals and were fitted bilateral canal-type hearing aids in the operated ears to replace a bone conduction hearing aid. The ability to discriminate inter-aural intensity differe...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.1080/00016489.2016.1249947
更新日期:2017-04-01 00:00:00
abstract::By a careful ENT and oral examination of 111 patients with suspected chronic maxillary sinusitis, the diagnosis was verified in only 56% (62/111). In 29 of these 62 patients (47%) a relation to dental infections was found, periodontitis being as frequent as apical granulomas. In 61% of the patients, in whom the diagn...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016488209130865
更新日期:1982-01-01 00:00:00
abstract:CONCLUSION:This study demonstrated that five Cx26 mutations (R32H, S199F, 572delT, 631-632delGT, and Y155X) affect gap junction (GJ) functions by causing impaired membrane targeting and aberrant cellular localization, and one mutation (R165W) leads to a constriction of the channel pore with no dye coupling. OBJECTIVE:...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016489.2010.506885
更新日期:2011-01-01 00:00:00
abstract::Anaesthesia and sedation in electrocochleo-graphy are of paramount importance for the whole procedure, since restlessness of the patient during the measurements can invalidate the results of the test. The time needed for extensive electrocochleography amounts on average to two hours. The only pain experienced during t...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.1080/16512251.1974.11675745
更新日期:1974-01-01 00:00:00
abstract::In experimentally damaged inner ears the structural alterations were correlated to electrocochleographic responses of the ear. Sectioning of the cochlear nerve with degeneration of the type I neurons but intact sensory cells results in normal cochlear microphonics but very weak and atypical nerve responses. By contras...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016487709128822
更新日期:1977-01-01 00:00:00
abstract::We have developed a new technique for analyzing the rotation vector of eye movement in three dimensions with an infrared CCD camera based on the following four assumptions; i) the eye rotates on a point; ii) the pupil edge is a circle; iii) the distance from the center of eye rotation to pupil circle remains unchanged...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.1080/00016489950181882
更新日期:1999-01-01 00:00:00
abstract::The perilymphatic space of the guinea pig was perfused in situ with artificial perilymph containing [32P] orthophosphate and 3H-glycerol while cochlear microphonic potentials (CM) were monitored. The perfusion of 10 mM gentamicin suppressed CM by 62% within 30 min. 32P-incorporation into phosphatidylinositol bisphosph...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016488309132872
更新日期:1983-07-01 00:00:00
abstract::Laryngeal paragangliomas are rare submucosal lesions that arise from paraganglion cells located in the false vocal fold and subglottic larynx. To date, 76 recognized cases have been reported in the world literature. Symptoms arise when the lesions become large enough to impair function. Supraglottic paragangliomas cau...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章,评审
doi:10.1080/00016480410017576
更新日期:2004-11-01 00:00:00
abstract::In the last few years the use of ABR in the dysmetabolic encephalopathies has aroused considerable interest. Even though brainstem involvement in these syndromes is not yet entirely understood, ABR techniques have provided new and important insights. We studied 60 insulin-dependent diabetic subjects, 29 females and 31...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:
更新日期:1987-05-01 00:00:00
abstract:CONCLUSION:Reconstruction with a vascularized bone flap provided superior postoperative outcomes compared with reconstruction with a soft tissue free flap. However, patients obtained acceptable long-term functional outcomes even with a soft tissue free flap and this method is an option in selected patients. A multidisc...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016489.2013.824111
更新日期:2013-12-01 00:00:00
abstract::Dysphagia is a common presenting complaint in otolaryngology practice, and there are many causes. Forestier syndrome is a rare cause of dysphagia. It is also known as diffuse idiopathic skeletal hyperostosis (DISH) syndrome or vertebral ankylosing hyperostosis. Forestier syndrome consists of anterolateral perivertebra...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.1080/00016480500504192
更新日期:2006-07-01 00:00:00
abstract:CONCLUSION:Ear, nose and throat (ENT) involvement is common in Churg-Strauss syndrome (CSS), usually manifesting as allergic rhinitis and chronic rhinosinusitis with or without polyps. Otolaryngologists may play a pivotal role in making an early diagnosis of this disease. OBJECTIVES:CSS is a systemic vasculitic disord...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.1080/00016480500437435
更新日期:2006-05-01 00:00:00
abstract::This report shows the changes that occurred in consecutive audiograms of a patient who underwent chemotherapy and radiotherapy for nasopharyngeal cancer and the histopathological examination of the temporal bones. Both conductive and sensorineural hearing loss developed, but followed different modes of progression. In...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.1080/00016480601127026
更新日期:2007-10-01 00:00:00
abstract::This study was designed to assess the utility of otolith-ocular reflex testing in patients with complete unilateral peripheral vestibular deficits. Ten subjects were given a clinical vestibular test battery (ENG & vertical rotation) and research oriented tests of otolith function including dynamic posturography with h...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016489509139392
更新日期:1995-11-01 00:00:00
abstract:CONCLUSION:Use of the Meniett pressure generator in patients with active Ménière's disease (MD) did not affect labyrinthine function. OBJECTIVE:To investigate whether application of the Meniett pressure generator in patients with active MD significantly affects their labyrinthine function. MATERIAL AND METHODS:We mea...
journal_title:Acta oto-laryngologica
pub_type: 临床试验,杂志文章
doi:10.1080/00016480500388869
更新日期:2006-03-01 00:00:00
abstract:CONCLUSION:The visual outcomes of endoscopic treatment of optic neuropathy are favorable. However, no specific prognostic factor was associated with good outcome. OBJECTIVE:To investigate visual outcomes of patients with optic neuropathy caused by paranasal mucocele or sinusitis. METHODS:The clinical course in 38 pat...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016489.2011.557837
更新日期:2011-08-01 00:00:00
abstract::Negative membrane potentials from the stria vascularis of the guinea pig have been recorded in vivo. Stable negative membrane potentials from the stria cells have also been recorded for as long as 2 minutes in vitro. They varied from -20 mV to -49 mV, irrespective of whether the stria vascularis was immersed in Ring...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016487909137159
更新日期:1979-01-01 00:00:00
abstract::Experimental animals (cats) were exposed to tones of 125, 1000, 2000, and 4000 Hz at sound pressure levels in the range 120 to 157.5 dB, and for durations of one hour (1000, 2000, 4000 Hz) or four hours (125 Hz). Pure tone audiograms were obtained for each animal before and after exposure. Post-exposure tests were con...
journal_title:Acta oto-laryngologica
pub_type: 杂志文章
doi:10.3109/00016487509121336
更新日期:1975-11-01 00:00:00