micro-MRI images in (a) wt and in (b) Gbx-2-CKO mice. Regions of the cochlea and semicircular canals can be seen in detail in the context of the Cb. Figure 1. Examples of 2D coronal sections in anterior to posterior direction (A-P) through 3D T1-weighted gradient echo (GRE) micro-MRI image of isotropic resolution of 50μm used for anatomical phenotyping illustrating contrast in the cerebellum (C...

A CT study was performed on 8 foetuses aged between 20 and 38 weeks. In foetuses at the 20th week the semicircular canals, the spiral canal of the cochlea and the initial (labyrinthine) part of the facial canal are visible. At week 24 the tympanic part of the facial canal is observed. In the 31st week the cochlea is divided into 2 compartments, and in the 38th week the vestibular aqueduct and o...

Rotatory chair testing of the horizontal semicircular canals is an important but specialized tool in vestibular examinations. This review summarizes stimulus protocols, basic physiology and the current knowledge. It will be shown that the value of rotatory testing in clinical practice is part of a vestibular test battery in high end vestibular and balance centers but not in a general clinical p...

The adult human temporal bone was investigated using micro-CT scans. Various aspects of the osseous labyrinth were presented in figures which are effect of the volume rendering. The 3D reconstructions were performed to visualize the cochlea and the semicircular canals embedded in the petrous bone. The final product of this study was a digital three-dimensional model of the entire osseous labyri...

This paper presents the preliminary design of the integrated stimulator and telemetry subsystems for a vestibular prosthesis to restore balance function. The work is part of the European project CLONS. The stimulator is designed to provide biphasic current pulses at specified amplitude, duration and rate to stimulate the semicircular canals in the vestibular system. Power and data transfer is p...

The interaction between the magnetic field of a magnetic resonance imaging (MRI) machine and ion currents within the inner-ear endolymph results in a Lorentz force. This force produces a pressure that pushes on the cupula within the semicircular canals causing nystagmus and vertigo. Here I discuss several implications of this unique and noninvasive way to stimulate the vestibular system in expe...

The Tullio phenomenon consists of vestibular symptoms on exposure to high-intensity acoustic stimuli, reflecting pathological stimulation of semicircular canals or otoliths. We report a patient with posttraumatic Tullio phenomenon to illustrate how precise measurement of eye movements during auditory stimulation, using the magnetic search coil technique, may characterize movements that are not ...

The retrolabyrinthine approach is classified among the posterior petrosectomies. Its goal to achieve an enlarged mastoidectomy while sparing intrapetrous neurotologic structures in order offer maximal exposure of cerebellopontine angle compound. stages procedure are subsequently skeletonization sigmoid sinus, wide opening mastoid antrum and semicircular canals. We present herein technique, indi...