Search results for "gnomon"

External hernia of the supravesical fossa: Rare or simply misidentified?

2017

Abstract Background External hernias of the supravesical fossa are considered rare, perhaps wrongly. Highlighting clinical and anatomical features could be useful for correct, preoperative diagnosis, thus avoiding the risk of complications such as incarceration. The study aims to demonstrate that the incidence of external protrusions of the supravesical fossa is higher that supposed. Probably, being mistaken for direct hernias, these hernia types are misidentified and not included in current classifications. This issue deserves attention due to the elevated risk of incarceration related to its distinctive structure. Material and methods 249 consecutive open anterior inguinal hernia procedur…

Klinische Aspekte der "argyrophilic grain disease"

2000

Argyrophilic grain disease (AGD) is a frequently occurring degenerative illness of the aging human brain. It is accompanied by progressive pathological alterations of the cytsokeleton which are traceable to an abnormal phosphorylation of the microtubule associated tau protein. Histologically, it is possible with the help of suitable staining techniques to identify pathognomonic spindle-shaped cellular inclusions (argyrophilic grains). These cellular inclusions display a typical cortical as well as subcortical distribution pattern. The goal of the present study is the retrospective evaluation of the clinical findings from 53 individuals with neuropathologically demonstrable AGD-related chang…

Granular nuclear inclusion body disease: Fine structure of tibial muscle and sural nerve

1985

Fine granular (hyaline) intranuclear inclusion bodies were found in perivascular cells of a muscle and a sural nerve biopsy from a 32-year-old woman with slowly progressive motor disturbances. The hyaline nuclear inclusion bodies could be distinguished from other intranuclear hyaline inclusions by their granularity, the size of the granules (approximately 5-15 nm), and the positive iron staining reaction. They were not seen in muscle fibers or Schwann cells. Because of these apparently pathognomonic structural features the patient appears to present a condition that has not been described before.

Review: Neuroradiological aspects of infantile spasms

1987

With the modern noninvasive brain imaging methods, cerebral lesions of different types and degrees can frequently be determined in infants with West syndrome. In CT examinations preceding the spasms and the ACTH therapy, "idiopathic" forms of infantile spasms were rare. The CT findings consistent with perinatal or postnatal encephalopathy were more frequent than those found with embryonic or fetal lesions alone. The fact that pathognomonic changes cannot be determined, may reflect the low specificity of CT diagnosis in infants with chronic CNS diseases. A slight and mostly transient enlargement of CSF spaces during ACTH therapy is a probable side-effect of the medication. In infants with pe…

Uomini e technai nell'ambiente: tra Arie, acque, luoghi e il Prometeo incatenato

2021

Al centro dell'attenzione di questo studio è la relazione tra uomini e ambiente così come delineata nello scritto ippocratico Arie, acque, luoghi. In effetti, la valutazione di alcuni termini chiave presenti nell'opera ippocratica permette di individuare una relazione complessa, basata sulla reciproca osmosi e interazione tra l'essere umano e l'ambiente in cui vive, una relazione segnata da una terminologia che ne mette in luce il rapporto di somiglianza e di adattamento reciproco. Una particolare riflessione, in tal senso, merita la parte conclusiva del trattato ippocratico (considerato qui come unitario), in cui è descritta l'attitudine sociale (ethos) dell'essere umano, relativamente più…

Infantile spasms—A multidisciplinary challenge

1987

Is it not surpnsmg that we are unaware of an earlier description of infantile spasms (IS) than that of Dr West from 1841 [1] , though this is hardly a new disease? May be, it needed an experienced observer to delineate these paroxysmal behavioral patterns against the background of abnormal psychomotor development. Up to now , we are by no means less puzzled by this manifestation of seizures than our professional forefather. It was only recently that we realized that the West syndrome consists not only of more or less typical serial seizures, usually a pathognomonic EEG pattern, and developmental arrest [2] , but has to be regarded as an encephalopathy [3-5] interfering with virtually all hi…

Pedestrian Tracking in 360 Video by Virtual PTZ Cameras

2018

Since the data acquired by a PTZ camera change while adjusting the pan, tilt and zoom parameters, the results of tracking algorithms are difficult to reproduce; such diffi- culty limits the development and the comparison of tracking algorithms with PTZ cameras. The recently introduced 360- degree cameras acquire spherical views of the environment, generally stored as equirectangular images. Each pixel of an equirectangular image corresponds to a point on the spherical surface. A gnomonic projection can be used to project the points on the spherical surface onto a plane tangent to the sphere. Such tangent plane can be interpreted as the image plane of a virtual PTZ camera oriented towards th…

Acanthocytes in urinary sediment--a pathognomonic marker?

1998

Enseñanza de las ciencias : revista de investigación y experiencias didácticas

2021

Son frecuentes las aproximaciones cualitativas e intuitivas que se hacen en la escuela sobre el movimiento aparente del Sol por el firmamento que tratan de proporcionar al alumnado observaciones para que construya un modelo del sistema Sol-Tierra. El presente trabajo muestra la forma de obtener datos con mayor exactitud de manera que faciliten al alumnado una visión más amplia y profunda de dicho modelo, que lo capacite para enfrentarse y resolver problemas cotidianos y los pueda aplicar a diferentes contextos, como el cuestionamiento de situaciones sociales en las que interviene la luz solar. There are common the intuitive and qualitative approaches made in the School on the apparent movem…

Histology of the Oral Mucosa in Patients With BRONJ at III Stage: A Microscopic Study Proves the Unsuitability of Local Mucosal Flaps.

2012

Background: Bisphosphonate Osteonecrosis of the Jaw (BRONJ) is a newly recognized condition reported in patients treated with aminobisphosphonates (BF). BRONJ is defined as the presence of exposed necrotic alveolar bone that does not resolve over a period of 8 weeks in a patient taking bisphosphonates who has not had radiotherapy to the jaw. Treatment protocols have been outlined, but trials and outcomes of treatment and long-term follow-up data are not yet available. In 2004 an expert panel outlined recommendations for the management of bisphosphonate-associated osteonecrosis of the jaws. Through the histological study of the oral mucosa over the bone necrosis and around the osteonecrosis …