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  • 1
    ISSN: 1279-8517
    Keywords: Infratemporal fossa ; Lateral pterygoid muscle ; Medial pterygoid muscle ; Maxillary artery ; Ultrasonography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé La fosse infra temporale et son contenu, en particulier les muscles ptérygoïdiens, est d'exploration difficile en dépit de son importance en pathologie odontostomatologique. Afin de réduire, pour des raisons d'économie de santé, les indications des examens tomodensitométrique et d'imagerie par résonnance magnétique aux malades dont l'état justifie le recours à ces investigations onéreuses, les auteurs précisent, en s'appuyant sur des coupes anatomiques orientées, les voies d'abord permettant la réalisation technique d'échographie ultrasonique. Seule la voie postérieure, entre la branche de la mandibule latéralement et le processus mastoïde médialement, a permis constamment l'exploration des muscles ptérygoïdiens et de la fosse infratemporale.
    Notes: Summary The infratemporal fossa and its contents (particularly the pterygoid muscles) is a region difficult to explore, in spite of its importance in odontostomatological pathology. In order to reduce the indications that justify examination by computed tomography and magnetic resonance imaging, for reasons of economy of health, the authors describe by application of orientated anatomical slices the way in which ultrasonography can be performed. Only the posterior approach between the mandible laterally and the mastoid process medially provided consistently adequate exploration of the infratemporal fossa and the pterygoid muscles.
    Type of Medium: Electronic Resource
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  • 2
    Publication Date: 2021-10-27
    Description: The emerged coral reef terrace sequence at Cape Laundi, on the north coast of Sumba Island (Indonesia), with at least 18 successive strandlines, remains poorly dated in spite of numerous previous data. The age discrepancies within these coral reef terraces (CRTs) were previously explained by their polycyclic nature, triggered by marine erosion and reoccupation of old coral colonies by new ones. This study aims at highlighting these processes, as well as the continental denudation that participates in the partial stripping of the thin superficial coral reef layer overlying the pre-existing surface, exhuming older coral colonies. For this purpose, we use a combined analysis of 36Cl cosmogenic concentrations, new 230Th/U ages, and previous dating in order to quantify denudation rates affecting the sequence and to highlight the role of marine erosion in reworking the lowest CRT surface. Our results demonstrate that 1) the lowermost CRT is composite, i.e., formed by different reefal limestone units constructed and eroded during successive highstands of the last interglacial, 2) following the last deglaciation, this CRT has been subjected again to coastal erosion and reoccupation during the Mid Holocene highstand, 3) its distal edge is affected by the current marine erosion and shows denudation rates higher by one to two orders of magnitude (from 279 ± 0.4 to 581 ± 0.4 mm ka−1) than the continental denudation values of higher CRTs (14.7 ± 8.3 mm ka−1 on average), 4) at the scale of a single CRT surface, variations in continental denudation rates are caused by epikarstification roughness, and 5) the distal edges have the highest continental denudation rate due to diffusion and regressive erosion produced by the runoff occurring along the steep downward cliff.
    Language: English
    Type: info:eu-repo/semantics/article
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