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PubMed1992

[The long-term evaluation of a project for the primary prevention of coronary cardiopathy at 10 years from the stopping of treatment. The second phase of the Roman Project to Prevent Coronary Cardiopathy (PPCC II Phase)].

At the end of the Rome Project of Coronary Heart Disease (CHD) Prevention (PPCC) lasted 6 years and involving 3131 treated and 2896 control men aged 40-59 belonging to occupational groups, the mean values of some coronary risk factors (systolic blood pressure, serum cholesterol, smoking habits, body mass index) were favourably reduced in treated men as compared to controls. Incidence (-25.4%) and mortality (-26.8%) from CHD were also lower, in 6 years, in treated vs control groups. Ten years after the end of the project and of the treatment procedures in "treated men", a subgroup of 1013 former treated men and one of 843 former controls could be re-examined, whereas mortality data could be collected in those 3395 men who were examined at the end of the 6-year project. The 16 year examination showed that serum cholesterol, blood pressure, body mass index and cigarette consumption are now lower, on the average, in former control men, as compared to that of former treated ones. The finding is largely justified by different behaviours of eating, smoking and motion habits and by the motivation and behaviour toward health problems. Coronary mortality, during the last 10 years, was higher among the former treated men as compared to that of former control men (+50.0%; p less than 0.05%). The reverse trend observed in these 10 years is likely explained by a psychological "rebound" phenomenon occurred in the former treated men and to some beneficial effects, in the former control men, bound to the secular trend which presently characterizes some living habits of the Italian population.

Cause of Death↗
PubMed1991

Familial insulin-dependent diabetes mellitus (IDDM) epidemiology: standardization of data for the DIAMOND Project. The WHO Multinational Project for Childhood Diabetes Group.

The WHO Multinational Project for Childhood Diabetes, known as the DIAMOND Project, has been responsible for establishing insulin-dependent diabetes mellitus (IDDM) registries and for carrying out diabetes incidence studies, descriptive epidemiological research, and analytical investigations which are being used to test specific hypotheses regarding the etiology of the disease. Standardized epidemiological data are being collected from countries around the world, permitting international comparisons between registries. Multinational studies are also beginning to investigate the potential genetic determinants of the disease, and are contributing to the development of familial IDDM epidemiology worldwide. The development of standards for data collection of IDDM family histories is important for multinational studies of IDDM recurrence risks in families, descriptive analyses of patterns of familial aggregation, and comparative analytical investigations of specific etiological determinants of IDDM in relatives. These activities are being implemented through the DIAMOND Project.

Child↗
PubMed1992

The Canadian Physiotherapy Quality of Care Project. Analysis of a derailed project.

The Physiotherapy Quality of Care Project was a project of the Canadian Physiotherapy Association, sponsored by the Canadian government to ensure the quality of physiotherapy. A consensus committee of physiotherapy educators and managers developed and tested an instrument to measure changes in patients' functional status during physiotherapy. Despite scientific development and wide distribution, this technology was not adopted. Alternative methods, which were heavily marketed, gained nationwide use instead.

Canada↗
PubMed1976

Autoradiographic studies of the projections of the midbrain reticular formation: ascending projections of nucleus cuneiformis.

The ascending projections of the cuneiform nucleus in the cat were traced by autoradiography in the transverse and sagittal planes following stereotaxically placed injections of (3)H-leucine. The ascending fibers are almost exclusively ipsilateral and enter the diencephalon as a wide radiation. At the mesodiencephalic junction fibers enter the nucleus of the posterior commissure and pretectal nuclei, and others cross in the posterior commissure to distribute to these structures on the contralateral side. More ventrally directed fibers distribute to the fields of Forel and then spread into the posterior hypothalamus and zona incerta. At the caudal level of the ventral thalamic group, the ascending fibers diverge and follow two separate courses. One division of fibers continues forward beneath the ventral thalamic group and distributes to the zpna incerta and dorsal hypothalamic area. It rapidly diminishes in size as it attains more rostral levels where it is found in the bed nuclei of the stria terminalis and the anterior commissure. Other fibers of this division spread laterally to innervate the ventral lateral geniculate nucleus, the lateral hypothalamus, and preoptic area, and still others follow the entire confirmation of the thalamic reticular nucleus. The second division of fiber ascends through midline and intralaminar nuclei, completely encircling the mediodorsal nucleus, which is uninnervated except for a small ventral region. The distribution of this division is heaviest to the paraventricular, parafascicular, and central dorsal nuclei. Neither division is conspicuous rostral to the anterior commissure. No projections to neostriatum or specific thalamic nuclei were evident.

Afferent Pathways↗
PubMed1976

The olivocerebellar projection in the cat as studied with the method of retrograde axonal transport of horseradish peroxidase. II. The projection to the uvula.

Following injections of small quantities of horseradish peroxidase (HRP) suspension in the uvula of the cat, the distribution of labeled cells in the inferior olive has been mapped. The findings confirm the conclusion made on the basis of studies of retrograde cell loss in the olive following ablations of the uvula (Brodal, '40b) that two small olivary subdivisions, the nucleus beta and the dorsomedial cell column project heavily to the uvula. In addition the HRP-study shows that the uvula receives a smaller number of fibers from two circumscribed areas of the contralateral medial accessory olive. These areas appear to project to the lateralmost parts of the uvula (fig. 4). The findings thus support the presence of a longitudinal zonal subdivision in the uvula. Labeled cells are found in the nucleus beta and the dorsomedial cell column also following injections of the fastigial nucleus and to a lesser degree of lobulus VII of the vermis (Hoddevik et al. 76). This may be due to collateral branching of olivary efferents. There is some evidence for a topographical correlation between dorsal and ventral parts of the uvula and rostral and caudal parts, respectively, of the nucleus beta and the dorsomedial cell column. This may be related to functional differences between the two parts of the uvula.

Animals↗
PubMed1977

The olivocerebellar projection studied with the method of retrograde axonal transport of horseradish peroxidase. V. The projections to the flocculonodular lobe and the paraflocculus in the rabbit.

HRP was injected in the flocculonodular lobe and the paraflocculus in the rabbit to determine the areas of the inferior olive which project onto these cerebellar regions. Following injections in the flocculus labeled cells occurred in the dorsal cap and the rostralmost tip of the medial accessory olive. Following injections in the nodulus labeled cells were likewise found in the dorsal cap, but in addition in the rostralmost part of the dorsomedial cell column and the adjoining part of the medial accessory olive. Injections in the dorsal paraflocculus gave rise to labeling in the rostrolateral part of the medial accessory olive, while injections in the ventral paraflocculus resulted in labeling in the principal olive, mainly in the lateral part of the ventral lamella. Injections in the lateral third of the dentate nucleus gave rise to labeling mainly in the dorsal lamella of the principal olive. The results are discussed with reference to those obtained by previous authors. There are both similarities and discrepancies. It appears from what is known of afferents from areas mediating visual impulses to the inferior olive that the olivary areas projecting onto the flocculonodular lobe, and possibly the dorsal paraflocculus, may mediate visual impulses to these lobules.

Afferent Pathways↗
PubMed1979

The Ottawa County project: a report of a tuberculosis screening project in a small mining community.

Following a retrospective review of tuberculosis cases reported from Ottawa County, Oklahoma, from 1969 through 1973, a selective tuberculosis screening project was implemented. Screening of a "target group" of the population, 519 former miners, greater than or equal to 50 years of age, resulted in the discovery of abnormal chest X-rays in 182; (103 with silicosis, 36 with silicotuberculosis, 12 with inactive tuberculosis, and 31 with other abnormalities). Eighty-five of these persons had positive tuberculin skin tests. Preventive therapy was recommended for 50, and 36 completed the prescribed course of treatment. Eight new bacteriologically confirmed cases of tuberculosis were found and treated. A large number of persons (1,904) residing in the same area who were not part of the target group were also screened for tuberculosis. This group contained a large number of positive tuberculin reactors but very few were candidates for isoniazid preventive therapy. Thirteen persons in this group had abnormal chest X-rays consistent with inactive tuberculosis but 12 had been identified and given preventive therapy before the project began. These data suggest that selective approaches to screening for tuberculosis in a community which are based on an in-depth retrospective review of the tuberculosis case register can be highly successful.

Aged↗
PubMedDate not supplied

[The influence of recognition of a visual stimulus on evoked potentials of the projection and non-projection areas of the cerebral cortex].

Evoked potentials (EP) were recorded in the projection and non-projection areas of the cerebral cortex in juveniles in response to exposures of structured visual stimuli with subthreshold and supraliminal durations. The data obtained have shown that recognition of the presented stimulus is attended with intensification of the EP late complex. This effect is most pronouned in the central and frontal parts of the cortex. The Nv component with a 240 to 300 msec latency has a more regular connection with recognition as compared with other components.

Brain Mapping↗
PubMed1990

Claustro-neocortical projections in the rhesus monkey (projections to area 6).

The distribution of claustral neurons projecting to area 6 on the convexity and medial wall of the hemisphere was studied in four macaque monkeys. In all cases, HRP-positive neurons were found almost throughout the antero-posterior extent of the claustrum in its dorsal half. Following HRP injections in area 6 on the medial wall of the hemisphere most of the labelled neurons were found in the dorsal and dorsolateral portions of the claustrum. After injections in area 6 on the hemispheral convexity, labelled neurons predominated in about the middle third of the vertical extent of the claustrum. Perikaryal polymorphism and considerable differences in perikaryal size are features characteristic of claustral neurons projecting to area 6. There is a preponderance of labelled neurons whose perikarya are noted for their multipolar or pyramidal (triangular) shape. Oval and spindle-shaped neurons were found less frequently. The size of the perikarya ranged from 11 to 26 microns while most of the labelled neurons had perikarya ranging form 14 to 18 microns in size.

Animals↗
PubMedDate not supplied

[Evaluation of a project of primary prevention of smoking: the Barcelona PASE project].

The results of the short-term evaluation of a program to prevent the use of tobacco and other substances among schoolchildren of sixth and seventh grade are presented. Schoolchildren who participated in the project show significant differences when compared to a reference group through a matched analysis in the regular use of tobacco and having bought tobacco, but not in the experimentation nor in the intention to smoke. The results suggest the program is useful to prevent the onset of smoking, although longer term evaluation data are needed. The results and their implications for a comprehensive smoking prevention approach in schools are discussed.

Age Factors↗
PubMed1975

Autoradiographic studies of the projections of the midbrain reticular formation: descending projections of nucleus cuneiformis.

The descending projections of nucleus cuneiformis in the cat were traced by autoradiography in the transverse and sagittal planes following stereotaxically placed injections of 3H-leucine. Many descending axons are organized into distinct fiber systems, of which the largest and most well-defined crosses directly in the midbrain and descends through the ventromedial tegmentum of the brain stem. This fiber system first terminates profusely in n. reticularis tegmenti pontis and then proceeds through the rhombencephalic tegmentum emitting transversely oriented branches to n. reticularis pontis caudalis and gigantocellularis, the raphe magnus and the facial nucleus...

Animals↗
PubMed1991

Gracile projection to the cat medial accessory olive: ultrastructural termination patterns and convergence with spino-olivary projection.

The caudal medial accessory subdivision of the inferior olive (cMAO) receives information from the hindlimb from both the gracile nucleus and the lumbosacral spinal cord. This study determined which elements in cMAO serve as the postsynaptic targets of the gracile projection and whether these elements also receive input from the lumbosacral spinal cord. Gracile axons were labeled in cats by anterograde transport of wheat germ agglutinin conjugated to horseradish peroxidase (WGA-HRP), visualized with tetramethylbenzidine. Convergence of gracile and lumbosacral axons was evaluated by labeling in the same animal, one pathway by WGA-HRP and the other by degeneration. In cMAO, gracile axons synapse with equal probability on dendritic spines and distal dendritic shafts. This termination pattern contrasts markedly with that of other somatosensory inputs to the inferior olive and may account for the greater heterogeneity in responses to somatosensory stimuli displayed by neurons in cMAO. The distal dendritic shafts receiving gracile input were more likely than dendritic spines to receive convergent input from putative inhibitory synapses. The most likely source of these inhibitory synapses is the parasolitary nucleus, a structure that has been shown by others to receive input from the cerebellum. Thus the parasolitary nucleus may serve as an inhibitory relay between the cerebellum and cMAO. The dendritic spines in cMAO that receive input from the gracile nucleus often receive additional input from the lumbosacral spinal cord. This convergence of somatosensory axons on dendritic spines may provide a mechanism through which the unusually complex receptive fields of neurons in cMAO are generated.

Animals↗
PubMed1978

Natural history of myocardial infarction in the coronary drug project: long-term prognostic importance of serum lipid levels. Coronary Drug Project Research Group.

The relation between baseline fasting serum lipid levels (serum cholesterol and triglycerides) and 5 year rates for four end points--mortality from all causes, mortality from coronary heart disease, sudden death due to coronary heart disease and incidence of nonfatal myocardial infarction plus coronary death--was studied in 2,789 men. These were patients in the Coronary Drug Project placebo group who were 30 to 64 years old on entry and had recovered from one or more previous documented myocardial infarctions. Serum cholesterol was significantly related to all four end points, in both univariate and multivariate regression analyses (with control of 38 or 39 other factors in the latter). This significant relation of cholesterol to these end points was shown at low, medium and high levels of serum triglycerides. In contrast, baseline fasting serum triglyceride levels were not positively related to any of these end points. In these postmyocardial infarction patients, findings indicative of cardiovascular status at baseline evaluation, particularly the state of the myocardium, were more powerful prognosticators than serum cholesterol. These findings underscore the importance of efforts to prevent the first coronary episode. They also indicate the possibility after recovery from acute myocardial infarction of improving long-term prognosis through reduction of serum cholesterol.

Adult↗
PubMed1992

Nigrostriatal projections in the rat as demonstrated by retrograde transport of horseradish peroxidase. II. Projection to the caudal striatum.

The distribution of nigral neurons projecting to the caudal and basal parts of the striatum was studied in 9 rats by means of the horseradish peroxidase labelling technique. Labelled neurons localized in the substantia nigra pars compacta were demonstrated throughout the antero-posterior extent of the nucleus. Most of them were found in the lateral half of the SNc. Labelled neurons localized in the substantia nigra part reticulata predominated in the caudolateral part of the SNr. Characteristic features included major perikaryal polymorphism and size range of the nigrostriatal neurons.

Animals↗
PubMed1992

[Cardiologic emergencies: mortality and treatment. An analysis of 500 consecutive coronary events within the framework of the WHO-MONICA Project--Brianza Area. The Research Group of the WHO-MONICA Project--Brianza Area].

Recently, a decreasing trend in cardiovascular mortality, starting from 1976-78, has been observed in Italy, particularly in northern regions. In order to explore one possible cause of the phenomenon, a survey of acute coronary care has been performed in a sample area, with about one tenth of the population of Lombardy, the largest and most developed northern Italian region. The survey has been carried out within the framework of the WHO-MONICA project: the treatment of 500 consecutive suspected coronary events in the age group 25-64 years, has been examined according to the international protocol. The following items have been investigated: time between onset of symptoms and medical intervention; characteristics of initial care; cardiac arrest and cardiopulmonary resuscitation in or outside the hospital; intensive care unit admission and length of stay; type of treatment before, during and after the event. Marked improvements have been accomplished in managing cardiac emergency. They have reduced in-hospital coronary mortality by more than 50%. However, several problems were still present at the time of the study, 1986-87: a) only 52% of patients obtained assistance within 4 hours (Tab III); b) cardiac arrest was practically always fatal outside the hospital and in 75% of the cases inside (Tab V); c) essential drugs, e.g. beta-blockers, were not so widespread and substantially absent were angioplasty and coronary bypass surgery (Tab IX). It has been estimated that improving adherence to optimal therapeutic standards might save more than 700 lives a year in Lombardy in the age group 25-65 years.

Adult↗
PubMed1979

[Responses of the vibrissal projection zone of the cat somatosensory projection zone to afferent activation].

Responses of 375 neurons of SI cortex region in the vibrissae projection zone were recorded in unanesthetized cats: responses to electrical stimulation of infraorbital nerve and mechanical stimulation of vibrissae were studied. Nerve and vibrissae stimulation evoked complex synaptic potentials (short EPSPs followed by IPSPs) in most neurons primary IPSPs were found in other units. The corresponding changes of impulse activity could be recorded in many neurons extracellularly. Initial inhibition was evoked by vibrissae stimulation more frequently (in 45% units comparing to 16% when the nerve was stimulated). Difference of minimal EPSP and IPSP latencies during intraorbital nerve stimulation was 0.8 ms, difference of mean values--1.4 ms. Directional sensitivity of cortical neurons (to the changes in direction of vibrissae deflection) is demonstrated. Neurons located in the close proximity may possess different pattern of directional sensitivity. It is supposed that short latency neuronal inhibition in SI cortical zone is mainly afferent (not recurrent). Probable mechanisms of directional sensitivity of the studied neurons are discussed.

Afferent Pathways↗