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Biomedical subjects

G Martin

Publications and source records attributed to G Martin.

At least 415 records · Page 23Linked to original sources
PubMed1979

Ultrastructural development of the neurohemal organ joined to the ecdysial gland after imaginal moulting in the male isopod Sphaeroma serratum Fab. (Crustacea Flabellifera).

The present ultrastructural study deals with the lateral cephalic nerve plexus of Sphaeroma serratum, a neurohemal organ joined to the Y organ (ecdysial gland). This plexus acts as a storage centre for neurosecretory products from two sources: the two autochtonous cells (plexus cells) within the plexus itself, and the neurosecretory cells in various parts of the central nervous system, particulary the "mandibular ganglion" (A-cells). In prepuberal animals, plexus cells and subesophageal A-cells produce neurosecretory granules of two types measuring 1550 +/- 50 A and 1570 +/- 40 A respectively. Five categories of axon terminals were distinguished in the plexus. The granules found in two of these terminal types are believed to come from the plexus cells and from the "mandibular ganglion" A-cells. Cessation of production of neurosee plexus with concomitant depletion and disappearance of different granule categories. The first axon terminals affected by this process are the two categories containing granules originating in the plexus and "mandibular ganglion" A-cells. Degeneration of the ecdysial gland in male Sphaeroma serratum might be connected with the cessation of granule formation in these two types of cell.

Animals↗
PubMed1979

Some physical principles of intracranial pressure measurement.

The general formula for the pressure difference across a curved flexible membrane has been applied to a number of intracranial pressure (I.C.P.) measuring systems and certain criteria deduced for the accurate measurement of I.C.P. The Numoto bag, the implanted extradural transducer and the intracerebral bag have been shown to be acceptable providing these criteria have been met. Some deductions about the magnitude sign and constancy of the zero error have been made. Some other I.C.P. measuring systems have been shown to have serious and unknown zero errors which vary from hour to hour. Because of the curved surface of the ventricle itas been shown that ventricular fluid pressure cannot equal the tissue pressure (though it may closely approximate it) and the difference between the two increases as hydrocephalus progresses.

Brain↗
PubMed1979

[A fatal syndrome associating a micromelic dwarfism, an ichthyosiform skin disorder and a severe combined immunologic deficiency. Report of a case and survey of the literature (author's transl)].

Congenital immunologic deficiencies and congenital dwarfisms represent two seemingly unrelated disorders. Here is reported the tenth case of a definite congenital and fatal syndrome associating a severe combined immunologic deficiency and a micromelic dwarfism, affecting mainly the proximal limbs, as well as an ichtyosiform and furrowed skin disorder. Although the adenosine deaminase activity has not been determined in this patient, a 4-month old boy, this syndrome seems to be different from cases of ADA negative SCID. The associated impairment of growth and immunity emphasizes once more the close genetic linkage existing between the development of the skeleton and the lymphoid tissue.

Adenosine Deaminase↗
PubMed1979

[Ionising rays and laryngeal carcinomas (author's transl)].

Review of the literature and report of a new care of laryngeal cancer after irradiation of a benign lesion of the neck. These cases obviously become rare since benign lesions are no longer irradiated. Today the risk of inducing a second carcinoma by a successful irradiation of the first tumor becomes more important. A study of 109 patients, irradiated for laryngeal carcinoma and surviving with no evidence of disease for a period of at least 5 years has been performed. 8 of these patients developed a second primary in the previously irradiated area after 7-15 years. These second carcinomas are not rare if one considers that most patients with laryngeal carcinoma are 60-70 years old and therefore the life expectance on an average is low. These facts should be taken into consideration when deciding between surgical or radiation therapy in younger patients with high life expectance.

Aged↗
PubMed1979

[Multiple malignant tumours in patients with laryngeal cancers (author's transl)].

Of 496 patients with laryngeal cancer, 45 developed second primary cancers in other organs. In 7 patients triple primary tumours were detected. Multiple malignant tumours in the region of the upper respiratory and alimentary tracts were frequent; especially noticeable was the combination of larynx- and lung tumours. The prognosis of the second cancers is bad, since these tumours are diagnosed late and the patients are usually very old. Of patients, who were cured of the first cancers, one in five developed a new cancer after the five year limit. The follow up examinations must therefore be continued beyond the five year limit.

Adult↗
PubMed1978

Skull X-ray policy.

Explore the source record for details and available documents.

Cost-Benefit Analysis↗
PubMed1978

The role of trauma in disc protrusion.

An analysis of the carefully taken histories of 68 patients whose disc lesion was verified at operation showed that 72% of them gave a history of trauma at the onset of backache. The forces involved varied from very great to minimal and 28% had no history of trauma at all. Therefore it is concluded that trauma may be a precipitating but not a primary factor. It is suggested that the primary factor is a painless nuclear herniation into the inner layers of the annulus, which are painless because they have no innervation. Trauma causes the nucleus to rupture into or through the outer five or so innervated layers, precipitating pain and symptoms.

Back Pain↗
PubMed1978

GLC assay of fenclorac in human plasma.

A simple, sensitive GLC assay for fenclorac is described. Plasma proteins were precipitated with methanol, and the methanolic extract was refluxed with hydrochloric acid to form the methyl esters of fenclorac and the internal standard. The esters were purified by partitioning into benzene. Aliquots of 1 microliter of the concentrated benzene phase were injected into the gas chromatograph and quantitated by a 63Ni-electron-capture detector. Recovery of fenclorac from plasma averaged 82 +/- 1.6%.

Adult↗
PubMed1978

Selective tomography of the TMJ and the myofacial pain-dysfunction syndrome.

Tomography is the only technique that gives a precise representation of the temporomandibular articulation. To delineate a discrete impingement upon the articular space and compare before-and-after treatment modalities it is essential to strictly respect the angular criteria. Selective tomography can be accomplished only if three criteria are met: 1. To make an axial cephalogram perpendicular to the submental-vertical film and to measure the angle of the grand axis of each condyle with the median sagittal plane; 2. To orient the incident ray perpendicular to this axis for the sagittal sections and parallel for the frontal sections; 3. To be sure of the exact position of the head on the tomograph. The teeth also must be placed in maximum occlusal contact.

Diagnosis, Differential↗
PubMed1978

Pure tone thresholds for the rhesus monkey.

Auditory thresholds were measured for 18 ears from 13 rhesus monkeys using a simple reaction-time procedure. The threshold contour was a smooth W-shaped function with rises at the extreme frequencies and around 4 kHz and was comparable in shape with previously reported thresholds for this animal. Standard deviations averaged 5.3 dB.

Animals↗
PubMed1978

[Correlation between the presence of a bacterial symbiont in oocytes of Parcellio dilatatus petiti, and the sterility of the cross: P.d. petiti male x P.d. dilatatus female].

A symbiotic bacteroid matroclinously transmitted is present in the ovocytes and the follicular cells of the sub-species Porcellio dilatatus petiti of the Saint-Honorat island, as well as in all hybrid females born from a petiti mother. It is absent in the Porfellio dilatatus dilatatus females (population of Poitiers) and this seems to cause the lithality in the periblastula stage -- as a result of abnormal anaphases--of practically all the embryos of the crossing : male petiti x female dilatatus.

Crosses, Genetic↗
PubMed1978

[The therapy of tinnitus resulting from blast injury (author's transl)].

In a prospective study aimed at the cure of tinnitus due to blast injury, oral treatment of 172 patients with the mono-substances Betahistine, Pentoxifyllin and Xantinol-nicotinate were compared with those of control patients who received no medications. Patients treated with Pentoxifyllin and Xantinol-nicotinate improved better than the comparative group without therapy although the differences were not considerable. Betahistine as compared with the other groups produced significantly better therapeutic results.

Adolescent↗
PubMed1977

Cervical spondylotic myelopathy in wide canals.

The anteroposterior diameters of the cervical spinal canal in 21 patients with cervical spondylotic myelopathy were measured. In more than one-third (eight) of these it was found that this diameter of the canal was more than 14 mm, despite a widely held belief that this myelopathy is unlikely if the cervical spinal canal is wider than 14 mm in the AP diameter.

Humans↗