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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Surgical and radiologic anatomy 17 (1995), S. 307-310 
    ISSN: 1279-8517
    Keywords: Cricoarytenoid ligament ; Vocal cord ; Voice disturbance ; Larynx ; Plastination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Le ligament crico-arythénoïdien a été étudié à partir de coupes plastinées de dix larynx humains adultes. Les fibres de collagène qui constituent le ligament s'insèrent sur une petite zone du bord supérieur de l'arc du cartilage thyroïde et sur le périchondre cricoïdien dorsal adjacent. Les fibres renforcent la partie dorsale et médiane de la capsule de l'articulation crico-arythénoïdienne. Elles sont disposées en plusieurs couches séparées par du tissue adipeux. La couche la plus médiale des fibres de collagène est insérée sur le versant médial du processus vocal, alors que la corde vocale, elle-même, est amarrée plus latéralement. Contrairement aux descriptions de la littérature, aucune fibre du ligament crico-arythénoïdien ne rejoint le pli vocal [corde vocale]. Tout particulièrement, la partie médiale du ligament est importante pour le contrôle des mouvements d'abduction et d'adduction cordage. Une dysphonie peut résulter d'une asymétrie de structure du ligament crico-arythénïdien.
    Notes: Summary The cricoarytenoid ligament was studied in sections of ten plastinated adult human larynges. The collagenous fibres forming the ligament originate from a small area at the upper rim of the cricoid lamina and from the adjacent dorsal cricoid perichondrium. The fibres strengthen the dorsal and medial part of the capsule of the cricoarytenoid joint. They are arranged in several layers separated by adipose tissue. The most medial layer of the collagenous fibres is attached to the medial aspect of the vocal process, whereas the vocal cord is anchored more laterally. Contrary to the descriptions in the literature, no fibres of the cricoarytenoid ligament join the vocal cord. Especially, the medial part of the ligament is important for controlling abduction and adduction of the vocal cords. Voice disturbance may result from structural asymmetry of the cricoarytenoid ligament.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European archives of oto-rhino-laryngology and head & neck 255 (1998), S. 365-367 
    ISSN: 1434-4726
    Keywords: Key words Supraglottic anatomy ; Voice production ; Superior laryngeal nerve ; Recurrent laryngeal nerve ; lesions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The muscular tissue of the vestibular folds was investigated in plastinated serial sections of 32 normal adult larynges. Three muscular systems could be distinguished. A posterolateral muscle layer was found to be developed at the lateral margin of the posterior part of the vestibular fold. Its fibers extended in a sagittal direction, and their contraction probably resulted in an adduction of the entire tissue of the vestibular fold towards the midline. Within the anterior part of the vestibular fold, an anterolateral muscle sheet was seen to attach to the thyroid cartilage. An anteromedial muscular system consisted of scattered groups of muscle fibers situated medially and dorsally to the laryngeal ventricle and saccule. These fibers were presumed to exert a downward pressure on the vestibular folds, in addition to an adductor function. According to clinical experience, adductor movements of the vestibular folds can be trained, even in cases with a recurrent laryngeal nerve lesion, in order to produce a compensatory voice. Thus, the muscles of the vestibular folds are probably innervated by the superior laryngeal nerve.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    European archives of oto-rhino-laryngology and head & neck 254 (1997), S. 410-412 
    ISSN: 1434-4726
    Keywords: Supraglottic larynx ; Anatomy ; Physiology ; Deglutition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Morphologic correlates of physiologic closure mechanisms of the laryngeal vestibule were investigated in plastinated serial sections of 25 normal adult larynges. The anterior part of the laryngeal vestibule was seen to be bounded by the epiglottis and the thyroepiglottic ligament medially, and by lateral extensions of the periepiglottic adipose tissue laterally. The posterior part of the laryngeal vestibule was bordered by the aryepiglottic folds. Morphologically, the periepiglottic space and the aryepiglottic folds were completely separated by several transversely oriented collagenous fiber layers attached to the thyroid perichondrium laterally. This may suggest a corresponding functional separation, as described previously in the literature. Closure of the anterior part of the laryngeal vestibule during swallowing is probably related to the lowering of the epiglottis, with both depending on pressure exerted onto the periepiglottic adipose tissue. Closure of the posterior part of the laryngeal vestibule is most likely related to closure of the rima glottidis, with both depending on adduction of the arytenoid cartilage.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    European archives of oto-rhino-laryngology and head & neck 255 (1998), S. 140-142 
    ISSN: 1434-4726
    Keywords: Key words Laryngeal anatomy ; Arytenoid cartilage ; Cancer extensions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The normal topographic relationships of the anterolateral surface of the arytenoid cartilage (ALSAC) were reinvestigated with special regard to possible implications involving the extensions of local cancer. Serial plastinated whole-organ sections of 34 normal adult larynges were examined. A cartilaginous crest subdivided the ALSAC into a cranial triangular fossa and a caudal oblong fossa and provided attachment to the lateral fibers of the vocal cord. The thyroarytenoid muscle was mainly anchored within the oblong fossa, but a few lateral muscle fibers extended further cranial ward along the ALSAC. The triangular fossa was the area of fixation of the vestibular ligament and was filled with adipose tissue as well as mucous glands grouped together by strong collagenous fiber septa. These septa revealed a craniocaudal orientation medially and a horizontal anteroposterior orientation laterally. These findings suggest that the septa guide early local cancer extension parallel to their own arrangement, acting as barriers that cannot be easily crossed. Correspondingly, cranial and horizontal-lateral cancer spread along the ALSAC has been reported in the clinical literature.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    European archives of oto-rhino-laryngology and head & neck 254 (1997), S. 193-195 
    ISSN: 1434-4726
    Keywords: Larynx ; Anatomy ; Paraglottic space ; Cancer extensions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The precise topographic relationships of the paraglottic space (PGS) were investigated in serial plastinated or frozen whole-organ sections of 46 normal adult larynges. Laterally, the PGS was bordered by the thyroid cartilage. Superomedially, the PGS in some specimens was only separated from the periepiglottic space by a coherent collagenous fiber septum. The paraglottic adipose tissue extended between the caudal fibers of the thyroarytenoid muscle. Inferomedially, the PGS was bordered by the conus elasticus. The anteroinferior portion of the PGS extended beyond the larynx beneath the inferior rim of the thyroid cartilage. Posteroinferiorly, the paraglottic adipose tissue extended towards the cricoarytenoid joint. Dorsally, the PGS was bordered by the mucosal lining of the piriform sinus. Due to the intimate topographic and histologic relationships present, cancer involving the PGS may rapidly infiltrate all adjacent anatomic structures.
    Type of Medium: Electronic Resource
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