Search results for " fossa"

Accidental migration of dental implant into the nasal cavity: Spontaneous expulsion through the nose

2021

Implant migration into the nasal fossa is a rare complication and it requires extraction by anterior rhinoscopy. We report a clinical case of placement of short dental implants, fixed or intruded in the nasal fossa floor, which was aspirated by the patient and spontaneously expelled a few days later. To the best of our knowledge, there have been no reports of spontaneously expulsion through the nasal cavity. Key words:Dental implant, nasal cavity, accidental migration.

Neurilemoma of the tibial nerve in the popliteal fossa A case report

1993

We report a case of a 61 year old man who had a history of 4 years right leg pain. Clinical and radiological examination and MRI revealed a soft tissue mass in the popliteal fossa. A neurilemoma of the tibial nerve was confirmed after removal of the tumor and histological examination. To our knowledge this is the first case of a neurilemoma located in the tibial nerve reported in the literature.

Origin of the natural variation in the storage of dietary carotenoids in freshwater amphipod crustaceans

2020

16 pages; International audience; Carotenoids are diverse lipophilic natural pigments which are stored in variable amounts by animals. Given the multiple biological functions of carotenoids, such variation may have strong implications in evolutionary biology. Crustaceans such as Gammarus amphipods store large amounts of these pigments and inter-population variation occurs. While differences in parasite selective pressure have been proposed to explain this variation, the contribution of other factors such as genetic differences in the gammarid ability to assimilate and/or store pigments, and the environmental availability of carotenoids cannot be dismissed. This study investigates the relati…

Head and Neck Cancers

2005

Central dislocation of the jaw-joint into the middle cranial fossa

1981

Summary The authors' case of central dislocation of the jaw-joint is used to discuss the incidence, mechanism of causation and the problems of clinical diagnosis, and the possible lines of treatment are listed. The management of the central dislocation in our case consisted of surgical reduction of the articular process by means of traction with hooked retractors over a fulcrum in the molar region.

Head and Neck Blocks

1988

Continuous SO2 flux measurements for Vulcano Island, Italy

2012

<p>The La Fossa cone of Vulcano Island (Aeolian Archipelago, Italy) is a closed conduit volcano. Today, Vulcano Island is characterized by sulfataric activity, with a large fumarolic field that is mainly located in the summit area. A scanning differential optical absorption spectroscopy instrument designed by the Optical Sensing Group of Chalmers University of Technology in Göteborg, Sweden, was installed in the framework of the European project "Network for Observation of Volcanic and Atmospheric Change", in March 2008. This study presents the first dataset of SO<sub>2</sub> plume fluxes recorded for a closed volcanic system. Between 2008 and 2010, the SO<sub>2</…

Confrontation of cryptic diversity and mate discrimination within Gammarus pulex and Gammarus fossarum species complexes.

2014

16 pages; International audience; Freshwater amphipods Gammarus fossarum and Gammarus pulex are widespread in Europe, with some evidence of cryptic diversity in the former. We used DNA barcoding to assess genetic diversity within and among amphipod populations and examined mate discrimination and pre-copulatory pair formation between genetically divergent individuals. Eight distinct G. fossarum and four distinct G. pulex molecular operational taxonomic units (MOTUs) were detected. Among the 33 amphipod populations sampled, 11 contained a single MOTU, 11 had two and 11 were composed of three sympatric MOTUs. Genetic divergences between sympatric MOTUs (G. fossarum and G. pulex MOTUs combined…

Shaping the antipredator strategy: flexibility, consistency, and behavioral correlations under varying predation threat

2014

9 pages; International audience; Recent ecological and evolutionary research emphasizes the importance of adaptive trait integration. For instance, antipredator defenses are built up of several morphological and behavioral components in many species, yet their functional relationships are still poorly documented. Using field-collected freshwater crustaceans Gammarus fossarum in a within-subject design, we investigated the flexibility and consistency of refuge use, photophobia, and exploration behavior as well as their associations, quantified both when predation risk was absent or artificially simulated. In agreement with the "threat-sensitivity" hypothesis, both refuge use and photophobia …

Opening New Window in Upper Clival Region: Results from Anatomic Study.

2018

Considering its position located anteriorly to the brainstem, the retrosellar area, in particular the upper clival region and the interpeduncular cistern, is one of the most difficult regions to surgically approach. To date, many different operative solutions have been described, given that this region is attainable by both lateral and median approaches. Lateral routes include the frontolateral, subtemporal, and frontotemporozygomatic approaches with relative variants that have been extensively reported. Among the lateral approaches, the frontotemporozygomatic one is considered particularly useful because it allows better visualization of the retrosellar and suprasellar areas minimizing the…