RESULTS: In groups A and B, the normal modiolus was visualized in 90% and 100% of ears, respectively. In groups C and D, with a total of 39 ears with a large vestibular aqueduct and an otherwise normal cochlea, modiolar deficiency was demonstrated in 100% of ears. CONCLUSION: CT is an excellent technique for depicting the cochlear modiolus PURPOSE: To evaluate the cochlear modiolus with thin-section magnetic resonance (MR) imaging in healthy subjects and patients with a large endolymphatic duct and sac, and to assess whether the cochlea is normal or abnormal in patients with a large endolymphatic duct and sac. MATERIALS AND METHODS: MR images were obtained in 10 ears in five volunteers (group 1), 40 ears in 20 patients with. Normal modiolus: CT appearance in patients with a large vestibular aqueduct. Radiology 1997; 204:213-219. Link, Google Scholar; 9 Okumura T, Takahashi H, Honjo I, et al. Vestibular function in patients with a large vestibular aqueduct. Acta Otolaryngol Suppl (Stockh) 1995; 520:323-326. Medline, Google Scholar; 10 Phelps PD, Mahoney CF, Luxon LM
The osseous spiral lamina is a microanatomic structure that can be faintly discerned on thin-section temporal CT images; it extends from the modiolus, paralleling the interscalar septae . The lateral aspect of the basal turn of the cochlea bulges into the middle ear cavity, forming the cochlear promontory ( Fig 5 ) Epidemiology. Cochlear hypoplasia accounts for 15% of cochlear malformations 1.. Radiographic features. According to the classification of Sennaroglu, there are four radiographically defined types of cochlear hypoplasia 2.In each type, the cochlea is a structure located at the end of the internal auditory canal, lucent on CT and fluid signal on MRI, that is overall smaller than normal BACKGROUND AND PURPOSE: High-resolution T2-weighted fast spin-echo MR imaging provides excellent depiction of the cisternal and intracanalicular segments of the vestibulocochlear and facial nerves. Absence or reduction in caliber of the cochlear nerve (deficiency) has been described in association with congenital sensorineural hearing loss (SNHL) Mondini malformation is a historical term used to describe an incomplete partition type II anomaly with large vestibular aqueduct. Terminology The term is often used inappropriately to describe any cochlear abnormality, rather than a specific t..
The cochlea (plural: cochleae) is part of the inner ear osseous labyrinth found in the petrous temporal bone.It contains the cochlear duct, part of the membranous labyrinth which senses hearing.. Gross anatomy. The cochlea is a shell-shaped spiral that turns between two-and-a-half and two-and-three-quarters times around the modiolus (a central column of porous bone) The modiolus has a close functional and anatomical relationship with the cochlear nerve and membranous labyrinth and can be evaluated with MRI but no data exist on the modiolar size in MD.Purpose: Our purpose is to examine the following hypothesis. Radiology. (1997) 204:213-9. doi: 10.1148/radiology.204.1.9205250 Modiolus is a point at the corner of the mouth or the angle of mouth where 8 muscles meet. It is also called as the Fibromuscular condensation where the extrinsic and intrinsic muscles meet together. This point is important in movement of facial muscles, facial expressions and in a treatment point of view for a dentist. [&helli The strength of HRCT is the detailed visualization of the bony structures of the middle and inner ear. The cochlea is composed of the central modiolus with bony septa that separate the basal, middle, and apical turns (2.5-2.75 turns) (Fig. 1).Each turn contains the scala vestibuli, scala tympani, and the cochlea duct
Results: The contrast ratio (CR) between the cochlear modiolus and cerebellar white matter on the injected side was 1.09±1.23, and that on the non-injected side was −0.48±0.38 (P<0.01). In all subjects, the CR value was larger on the injected than non-injected side, and enhancement of the cochlear modiolus was also recognized visually The modiolus is visible in A as a hypointense triangular area. The VIIIth nerve and its cochlear and vestibular divisions are noted (arrowhead in A). The VIIIth (white thick arrow) and VIIth (thick black arrow) nerves in the cisternal portion are seen in B (slightly cranial to A). 3D, three-dimensional; T 2 WI, T 2 weighted imaging modiolus, diameter of the EED and EES, and signal intensity of the EES were also measured by drawing regions of interest manually. The signal intensity ratio of EES/CSF was calculated. ment of Radiology, Nagoya University School of Medicine, 65 Tsurumai-cho, Shouwa-ku, Nagoya 466-8550, Japan. q American Society of Neuroradiolog
M-Modiolus. Cochlea S S-Stapes Sinus Tympani Pyramidal process Anterior epitympanic recess Cog Cochleariform process Facial recess. Cochlea RW ME ME-middle ear RW-round window Stapedius M. Carotid Otopathology Laboratory, Department of Radiology, Massachusetts Eye and Ear Created Date The modiolus appeared hyperdense with a dysplastic, bulbous, and truncated left-sided vestibule and adjacent part of LCC. The rest of the left LCC was not appreciated ([ Fig. 5A-C ]). Also, an associated anomaly was seen in the visualized cervical vertebrae in C1 and C2 with nonappreciation of right C1 arch with suspicion of partial. Also, modiolus explants without hair cells were co-cultured with DCX-copGFP-transduced HFBSCs, which demonstrate copGFP upon doublecortin expression during neuronal differentiation. Velocity of HFBSC migration towards modiolus explants was calculated, and after two weeks, co-cultures were fixed and processed for immunohistochemical staining
Radiology 1999;213:819-823. PubMed CAS Google Scholar 18. Lemmerling MM, Mancuso AA, Antonelli PJ, Kubilis PS. Normal modiolus: CT appearance in patients with a large vestibular aqueduct. Radiology 1997;204:213-219. PubMed CAS Google Scholar 19. Bachor E, Byahatti S, Karmody CS Normal Modiolus: CT Appearance in Patients with a Large Vestibular Aqueduct. Radiol, Nr. 204, Pp. 213-219, 3 Figg., 1 Tab . Chicago author-date (all authors Cochlear size was found to have a significant influence on modiolus proximity and insertion depth of the electrode (p < 0.01). Cochlear size explained around 13% of the variance in electrode position. When cochlear size was combined with surgical insertion, more than 81% of the variance in insertion depth can be explained
Sir: Description of the orbicularis oris muscle being divided into the pars peripheralis and pars marginalis first appeared in Lightoller's article in 1925. 1 When discussing the anatomical characterization of the modiolus and pars marginalis of the orbicularis oris, it is unwise to ignore the results in this classic article. We thank Hwang for pointing this out The apical modiolus could be exposed in all cases by a cochleostomy (1.6 mm 2, standard deviation ±0.23 mm 2) in the lateral second turn. 3D reconstructions and analysis of CBCT revealed reliable positioning of the marker in the apical modiolus, deviating on average 0.9 mm (standard deviation ±0.49 mm) from the targeted center of the second. The modiolus advancement allows for reconstruction of two fifths of the upper lip and the lower lip simultaneously and that has not been demonstrated by any other flap to our knowledge. A potential microstomia must be anticipated as with the Karapandzic flap and would be solved in a similar manner with a lateral commissuroplasty. An alternative. Reduced cochlear modiolus area and inner area of the lateral semicircular canal (LSCC) may be associated with insufficient maturation of the inner ear. (EH) from our database of radiology. The risorius muscle is highly variable in size ranging from small and slender to being a broadly set muscle pulling superolaterally on the corner of the mouth during many facial expressions [4, 7].It originates in the superficial fascia above the masseter muscle and attaches to the central tendon region known as the modiolus .When the modiolus contracts, it retracts and elevates the labial.
Stem-cell-based repair of auditory neurons may represent an attractive therapeutic option to restore sensorineural hearing loss. Hair-follicle-bulge-derived stem cells (HFBSCs) are promising candidates for this type of therapy, because they (1) have migratory properties, enabling migration after transplantation, (2) can differentiate into sensory neurons and glial cells, and (3) can easily be. Platysma (Musculus platysma) The platysma is a thin sheet-like muscle that lies superficially within the anterior aspect of the neck.It arises in the upper thoracic and shoulder regions from a fascia that covers the pectoralis major and deltoid muscles.Its fibers ascend superomedially over the anterolateral aspect of the neck, to attach on the mandible and the skin and subcutaneous tissue of. The muscles of facial expression (also known as the mimetic muscles) can generally be divided into three main functional categories: orbital, nasal and oral. These muscles are all innervated by the facial nerve (CN VII).¹. These striated muscles broadly originate from the surface of the skull and insert onto facial skin
Because it is nondestructive, it can be repeated and used as a control after position-correcting maneuvers. CONCLUSION: Cross-sectional imaging based on radiography is a valuable tool for the analysis of the electrode-modiolus relationship after cochlear implantation in isolated temporal bones, which may confirm histologic analysis. PMID: 1177384 Importance The round window insertion (RWI) and cochleostomy approaches are the 2 most common surgical techniques used in cochlear implantation (CI). However, there is no consensus on which approach is ideal for electrode array insertion, in part because visualization of intracochlear electrode position is challenging, so postoperative assessment of intracochlear electrode contact is lacking ter and Karapandzic flaps preserve the modiolus, buccinator, zygomaticus major muscle, and buccal branches of the facial nerve. The Bernard-Webster flap allowed for a larger oral aperture despite a larger defect, but required transection of the lower lip depressors and orbicularis oris. For upper lip reconstruction, the reverse fan flap preserves the modiolus and its muscle attachments. The.