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Biomedical subjects

F Levy

Publications and source records attributed to F Levy.

At least 127 records · Page 7Linked to original sources
PubMed1987

Indomethacin pretreatment inhibits fever after anodal, but not cathodal, medial preoptic lesions in rats.

Pretreatment with indomethacin (15 mg/kg) prevented the fever occurring in unanesthetized rats immediately after unilateral anodal electrolytic lesions of the medial preoptic area. The drug had no effect on the fever if given before cathodal lesions. If given after the lesions, when the fever had begun to develop, indomethacin lowered anodal body temperature back to baseline for varied lengths of time and attenuated cathodal fever.

Animals↗
PubMed1987

Relation of attention deficit and conduct disorder to vigilance and reading lag.

The relationship between DSM-III Axis I diagnoses 'attention deficit disorder with hyperactivity' (ADDH), 'conduct disorder' (CD) and 'anxiety disorder' (AD) and measures of attention and reading were studied in 158 children. Children diagnosed as having severe or moderate ADDH were found to be younger at referral and to have a lower IQ than were children with CD and AD. When age, IQ, social class and sex were controlled, children with severe ADDH were found to perform significantly worse than other diagnostic groups on some tests of vigilance and reading age. The data suggest that children with severe ADDH form a distinct group, and those with mild ADDH overlap symptomatically and on tests of vigilance with children with CD.

Achievement↗
PubMed1985

[Confusional form of Chlamydia psittaci encephalitis. Diagnostic value of microimmunofluorescence. A case].

A rare case of Chlamydia psittaci encephalitis is reported. The disease started with anxiety, agitation and fever (38.5 degrees C) accompanied with hallucinations and regressed within 48 hours, but a confusional syndrome persisted for 9 days. Alterations in the blood-brain barrier with low CSF protein levels and signs of lateralization could be demonstrated. The inflammatory syndrome remained discrete. The cause of the disease was disclosed by serology and epidemiological investigations. The spontaneous outcome was favourable, thus confirming that neurological forms of psittacosis are benign. This case shows that microimmunofluorescence is more sensitive than the complement fixation test and that significant levels of antibodies directed against Chlamydia psittaci may persist for almost one year in the absence of treatment.

Adult↗
PubMed1985

Evaluation of sensory nerve conduction velocity testing of the superficial radial nerve.

The purposes of this study were to evaluate the methods for examining the superficial radial nerve and to compare velocities and amplitudes of responses based on electrode shape and placement and site of stimulation. We selected 51 subjects with a mean age of 37 years from a healthy group. Twenty additional subjects with a mean age of 28 were also examined. Nerve conduction was done by stimulating over the dorsal forearm and lateral arm and recording from the superficial radial nerve where its branches cross the extensor pollicis longus tendon. The second group of subjects were stimulated at the same site and also at the elbow. Recording was done with a rectangular-shaped electrode placed in the area between the extensor pollicis longus and the extensor pollicis brevis tendons. We found a mean conduction velocity of 61 m/sec +/- 4.91 in the first group with a mean amplitude of response of 36.7 microV +/- 11.7 when we stimulated at the forearm site and 4.06 microV +/- 6.75 when we stimulated at the lateral arm site. In the second group of subjects, conduction velocity from lateral arm to forearm site was 63 m/sec +/- 4.50; from the lateral arm to elbow, 66 m/sec +/- 10.4; and from the elbow to the forearm site, 64 m/sec +/- 9.71. Amplitudes of response were 43.8 microV +/- 14.45 at the forearm stimulation site, 18.06 +/- microV +/- 7.37 at the elbow site, and 6.7 microV +/- 4.25 at the lateral arm site. We compared the mean velocities from the two methods and found no significant differences.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗
PubMed1983

Vaginal stimulation: an important determinant of maternal bonding in sheep.

The immediate induction of the full complement of maternal behavior in nonpregnant ewes primed with estrogen and progesterone has been obtained after 5 minutes of vaginal-cervical stimulation. A similar period of such stimulation given to recently parturient ewes, after the development of selective bonding to their own lambs, reversed their rejection behavior of alien lambs and produced a state of plasticity in maternal behavior, such that ewes receiving vaginal stimulation would accept and adopt alien lambs. These findings implicate vaginal-cervical stimulation as playing a role in the onset of maternal behavior.

Animals↗
PubMed1983

Attraction and repulsion by amniotic fluids and their olfactory control in the ewe around parturition.

The reaction of ewes towards amniotic fluids was studied in intact multiparous ewes in various physiological states (oestrus, luteal phase, mid-pregnancy and around parturition), using a test of preference for food associated or not with the presence of amniotic fluids in the food. Fluids were collected on alien newborn lambs. Results indicate that ewes are strongly repelled by amniotic fluid at all of the times tested except for a short period around parturition. Immediately before expulsion of the foetus ewes become strongly attracted by amniotic fluids. This attraction persists just after parturition, but fades within 4 hours in most animals. This attraction-repulsion behavior appears to rely heavily on olfactory cues. Ewes made anosmic with zinc sulphate do not show repulsion or attraction towards amniotic fluids at any of the physiological states studied. These results are discussed in the light of our knowledge about the factors controlling the onset of maternal behavior in the ewe (hormones and genital stimulation).

Amniotic Fluid↗
PubMed1981

Talc dust pneumoconiosis.

Various types of mineral dust can induce interstitial pulmonary fibrosis, but there is no definite correlation between lung X-ray findings, tissue lesions and the type of dust. In this paper, we report on the post mortem verification of talcosis by lung tissue analysis, using light microscopy, scanning electron microscopy, energy dispersive x-ray microanalysis and x-ray diffractometry.

Aged↗