scholarly journals Infrared photostimulation of the crista ampullaris

2011 ◽  
Vol 589 (6) ◽  
pp. 1283-1294 ◽  
Author(s):  
Suhrud M. Rajguru ◽  
Claus-Peter Richter ◽  
Agnella I. Matic ◽  
Gay R. Holstein ◽  
Stephen M. Highstein ◽  
...  
Keyword(s):  
Crista Ampullaris

Cytoplasmic Organization in the Receptor Cells of the Crista Ampullaris

1972 ◽  
Vol 30 ◽  
pp. 60-61 ◽  
Author(s):  
Robert F. Dunn
Keyword(s):  
Fine Particles ◽  
Apical Cell ◽  
Apical Region ◽  
Receptor Cells ◽  
Cuticular Plate ◽  
Morphological Organization ◽  
Crista Ampullaris ◽  
Cytoplasmic Organization ◽  
High Degree ◽  
General Appearance

Receptor cells of the cristae in the vestibular labyrinth of the bullfrog, Rana catesbiana, show a high degree of morphological organization. Four specialized regions may be distinguished: the apical region, the supranuclear region, the paranuclear region, and the basilar region.The apical region includes a single kinocilium, approximately 40 stereocilia, and many small microvilli all projecting from the apical cell surface into the lumen of the ampulla. A cuticular plate, located at the base of the stereocilia, contains filamentous attachments of the stereocilia, and has the general appearance of a homogeneous aggregation of fine particles (Fig. 1). An accumulation of mitochondria is located within the cytoplasm basal to the cuticular plate.

scholarly journals Design and Analysis of Posterior Semicircular Canal BPPV Diagnostic Test Based on Physical Simulation

2021 ◽  
Author(s):  
Xiaokai Yang ◽  
Qiancheng Yang ◽  
Zhaobang Liu
Keyword(s):  
Diagnostic Test ◽  
Semicircular Canal ◽  
Physical Simulation ◽  
Normal Vector ◽  
Forward Angle ◽  
Unit Normal Vector ◽  
Posterior Semicircular Canal ◽  
Average Value ◽  
Crista Ampullaris ◽  
Unit Normal

Abstract To discusses and analyzes how to realize the design of posterior semicircular canal BPPV diagnostic maneuver. First, measure the spatial attitude of the human semicircular canal, establish a BPPV virtual simulation platform, then analyze the key positions of the maneuver, and finally design a new diagnostic maneuver according to the demand, and perform physical simulation verification. The average value of the unit normal vector of the right posterior semicircular plane is [ 0.660, 0.702, 0.266], after rotate -46.8 ° around Z axis and 15.4 ° around Y axis, it parallel to the X axis. After that, when the tilt back angle reaches 70 °, the free otoconia in the left utricle will fall into the common crus; when bend forward 53.3°, the unit normal vector of the crista ampullaris plane of the posterior semicircular canal to the XY plane; when bend forward angle reaches 30°, the otoconia slides to the opening of the ampulla; when bend forward angle reaches 70°, the otoconia slides to the bottom of the crista ampullaris. The shallow pitching Yang maneuver is designed as turn head 45° to the one side, bend forward 45°, tilt back 90°, and bend forward 90°. The deep pitching Yang maneuver is designed as bend forward 90°, turn head 45° to one side, tilt back 135°, and bend forward 90°. A new posterior semicircular BPPV diagnostic test is designed to make the induced nystagmus have the characteristics of long latency, reversal, and repeatability, will not cause the inhibitory stimulation of the contralateral superior semicircular canal, and has good operation fault tolerance, which is of great value for clinical and scientific research.

scholarly journals Developmental GAD2 Expression Reveals Progenitor-like Cells with Calcium Waves in Mammalian Crista Ampullaris

iScience ◽  
2020 ◽  
Vol 23 (8) ◽  
pp. 101407
Author(s):  
Holly A. Holman ◽  
Yong Wan ◽  
Richard D. Rabbitt
Keyword(s):  
Calcium Waves ◽  
Crista Ampullaris

scholarly journals Histopathologic Evaluation of Intralabyrinthine Schwannoma

2020 ◽  
pp. 1-8
Author(s):  
Michael Bagattini ◽  
Alicia M. Quesnel ◽  
Christof Röösli
Keyword(s):  
Slow Growth ◽  
Complete Removal ◽  
Complete Resection ◽  
Lateral Semicircular Canal ◽  
Partial Removal ◽  
Intralabyrinthine Schwannoma ◽  
Crista Ampullaris ◽  
Histopathologic Evaluation ◽  
Histopathologic Analysis ◽  
Temporal Bones

<b><i>Objectives:</i></b> The aim of this study is to perform a histopathologic analysis of temporal bones with an intralabyrinthine schwannoma (ILS) in order to characterize its extension. <b><i>Methods:</i></b> Archival temporal bones with a diagnosis of sporadic schwannoma were identified. Both symptomatic and occult nonoperated ILS were included for further analysis. <b><i>Results:</i></b> A total of 6 ILS were identified, with 4 intracochlear and 2 intravestibular schwannomas. All intracochlear schwannomas involved the osseous spiral lamina, with 2 extending into the modiolus. The intravestibular schwannomas were limited to the vestibule, but growth into the bone next to the crista of the lateral semicircular canal was observed in 1 patient. <b><i>Conclusions:</i></b> Complete removal of an ILS may require partial removal of the modiolus or bone surrounding the crista ampullaris as an ILS may extend into these structures, risking damage of the neuronal structures. Due to the slow growth of the ILS, it remains unclear if a complete resection is required with the risk of destroying neural structures hindering hearing rehabilitation with a cochlear implant.

scholarly journals Morphological Features of Different Regions in Frog Crista Ampullaris(Rana esculenta).

1995 ◽  
Vol 58 (1) ◽  
pp. 1-16 ◽  
Author(s):  
Luciana GIOGLIO ◽  
Terenzio CONGIU ◽  
Daniela QUACCI ◽  
Ivo PRIGIONI
Keyword(s):  
Rana Esculenta ◽  
Morphological Features ◽  
Crista Ampullaris
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