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Biomedical subjects

D Elliott

Publications and source records attributed to D Elliott.

At least 163 records · Page 9Linked to original sources

Community coverage in a rural, church-based, hypertension screening program in Edgecombe County, North Carolina.

In a rural, church-based hypertension program in Edgecombe County, North Carolina, screening of the congregations was complemented by a community outreach component targeted at 18-60 year old males, a group at higher risk for untreated hypertension. Compared with its estimated frequency in the community, untreated hypertension was as common in the church congregations and somewhat less prevalent than expected among outreach screenees.

Adolescent↗

Manual asymmetries in the performance of sequential movement by adolescents and adults with Down syndrome.

Movement-sequencing deficits and possible manual-performance asymmetries in right-handed adolescents and adults with Down syndrome were examined. In Experiment 1, subjects with Down syndrome and retarded and nonretarded control subjects finger-tapped with both hands. Although both retarded groups finger-tapped more slowly than did nonretarded subjects, the two retarded groups did not differ. Subjects with Down syndrome, however, failed to show a manual performance asymmetry in favor of the right hand. In Experiment 2, a finger-tapping task and a cross-hand transfer of training paradigm were used to examine hemispheric dominance for movement sequencing. Although subjects with Down syndrome again showed no hand differences in tapping performance, they evidenced the same transfer of training asymmetries as did subjects without Down syndrome, suggesting that both the subjects with Down syndrome and the control subjects had a left-hemisphere dominance for movement sequencing.

Adult↗

Short-term memory for duration of movement.

This study examined the short-term retention characteristics of temporal information about visually guided movements. Subjects attempted to recall a preselected movement of a particular duration either immediately or after an unfilled or filled retention interval. Subjects did not benefit from an opportunity to rehearse information about duration of movement over the interval. This finding supports a decay model of forgetting for temporal information about visually guided movements.

Adult↗

Postoperative residual ovary syndrome: an uncommon cause of pelvic mass.

We report two patients with an ovarian mass following hysterectomy. These represent part of the spectrum of the "residual ovary syndrome." The retroperitoneal incarceration of a residual ovary and the presence of adhesions, preventing free access to the peritoneal cavity, result in an accumulation of follicular products locally and, thus, a mass with cystic and solid components. Differential diagnostic considerations include functional and dysfunctional ovaries, benign and malignant ovarian tumors, and endometriosis.

Diagnosis, Differential↗

A new look at the multifactoral etiology of gallbladder disease in children.

The etiology of gallbladder disease in children is multifactoral. Seven of these factors are fairly well known: obstruction of biliary ductal system, hemolytic disease, estrogen effect, obesity, familial, metabolic, and stress related. Our biggest group of patients, 19 out of the total 61 or 31 per cent, were found to have had prior abdominal/renal surgery or partial bowel obstruction. It has been shown that ileal resections result in gallstones due to loss of bile salt absorption; however, volvulus and partial obstruction from adhesive bands have never been incriminated before. A number of teenagers appear to develop acalculous cholecystitis and have symptoms a good many months before stones develop. These patients who have delayed (greater than 36 hours) excretion of oral cholecystogram dye also have positive duodenal drainage studies after cholecystokinin. Gallbladder disease in children is not a rarity as surgical textbooks would lead one to believe.

Abdomen↗

Gender differences in prism adaptation as influenced by a secondary task.

This experiment investigated prism adaptation as influenced by performing a secondary task during the adapting and by the gender of the subject. Experimental subjects (10 males and 10 females) performed a secondary force-production task with the left hand, while adapting to prismatic displacement with the right (target-pointing). Control subjects (n = 20) were not required to perform the force-production task. While male subjects were not influenced by the secondary task manipulation, female subjects exhibited less adaptation. Since males' and females' performance did not differ on the secondary force-production task, it is unlikely that this finding can be explained by differential primary vs secondary task tradeoffs.

Adult↗

The Oxfordshire mental handicap register.

A total of 2027 moderately or severely mentally handicapped people in Oxfordshire considered likely to require special services at some time have been identified for the Oxfordshire Mental Handicap Register. Prevalence rates for those aged 5 to 14 years are estimated to be 3.9 per 1000 home population and 4.14 per 1000 total population when hospital residents are included. Entry criteria are less strict than in other registers, however, and people are identified by general practitioners, health visitors, and hospital staff as well as through the more usual sources. The register is already proving useful when planning and providing services to those in need.

Adolescent↗

Randomized study of 5-FU and CCNU in pancreatic cancer: report of the Veterans Administration Surgical Adjuvant Cancer Chemotherapy Study Group.

Between the years 1973-1977, 152 male patients from 28 participating Veterans Hospitals with histologically proven nonresectable cancer of the pancreas were randomized in a two-arm study. The treated group was to receive combination chemotherapy with 5-FU and CCNU, and the controls were to receive no chemotherapy. Both groups were comparable with respect to age, amount of weight loss, extent of histologically proved metastases, and operation performed. In the treatment group, drug therapy was begun between 10 and 60 days postoperatively. Intravenous 5-FU, 9 mg/kg, was administered on five consecutive days, and CCNU, 70 mg/m2, was given orally on the first day of each course. In the absence of toxicity, the course was repeated every six weeks for life; 146 drug courses were given. The incidence of toxicity was not great. One or more toxic reactions were reported for one-third of the drug courses administered, but for the most part, these were mild. The most frequent toxic reaction was vomiting in 17% of the courses, and hematologic toxicity-primarily leukopenia-in 15% of the drug courses. There was no evidence of a beneficial effect on survival from drug treatment in the group as a whole or in any subgroup analyzed. The median survival of the control group was 3.9 months, and of the drug-treated group, 3.0 months.

Adenocarcinoma↗

Interlimb transfer after adaptation to visual displacement: patterns predicted from the functional closeness of limb neural control centres.

Two experiments were designed to determine whether interlimb transfer of prism adaptation follows a pattern predicted by the functional closeness of limb control centres. Subjects were adapted to a lateral displacing prism with their right arm in conditions known to facilitate interlimb transfer. Negative aftereffect measures of target-pointing shift were taken for all limbs. If transfer to the unadapted limbs is primarily the result of some sort of visual change, scores for those limbs should not differ. However, if the functional cerebral closeness of limb control centres is a factor, the greatest shift should be evidenced in the homologous contralateral limb (left arm), followed by the ipsilateral limb (right leg), with the least shift to the diagonally opposite limb (left leg). No differences in shift among the three unadapted limbs was found in the two experiments.

Adaptation, Ocular↗

Alternative pathway activation of complement in fetal lamb serum by Trichostrongylus vitrinus larvae.

Fetal lamb serum (FLS) complement activated by incubation with Trichostrongylus vitrinus larvae was deposited on the larval surface and its presence was demonstrated by leucocyte and erythrocyte adherence reactions and by analysis of antisera from guinea-pig immunized with the larvae. The complement activation proceeded in the apparent absence of antibody and in the presence of ethylene glycol tetracetic acid (EGTA) or Mg++-EGTA but not ethylenediamine tetracetic acid (EDTA). FLS heated to 50 degrees C for 30 min was inactive, but activity was restored by addition of FLS factor B alone or factor B plus Mg++-EGTA. FLS treated with zymosan or inulin was inactive. These results suggest that this non-immune activation of sheep complement by T. vitrinus takes place via the alternative pathway.

Animals↗

Visual and kinesthetic memory and integration of mentally retarded and nonretarded adults.

The verbal short-term memory finding (Brown, 1974) that retarded individuals often fail to adopt rehearsal strategies spontaneously was extended to situations involving visual and kinesthetic short-term memory. Subjects were presented with a distance either visually or kinesthetically and after either a filled or unfilled retention interval were asked to reproduce the distance either visually or kinesthetically. Both retarded and nonretarded subjects seemed to benefit from the opportunity to rehearse information over the unfilled retention interval. The performance of cultural-familial retarded subjects mirrored that of nonretarded subjects, but brain-damaged subjects did particularly poorly in crossmodal situations. In conditions involving kinesthetic reproduction, brain-damaged subjects systematically overestimated distances.

Adult↗