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PubMed1975

Chronic MPD, group therapy and psychodynamics.

Three groups of patients with myofascial pain-dysfunction syndrome received 12 eclectic group psychotherapy sessions. The principal reason for selecting this mode of treatment was to observe the group dynamics for the operation of intra and interpersonal variables that might support the psychophysiologic hypothesis for myofascial pain-dysfunction syndrome and validate the existence of personality characteristics that are associated with patients who have myofascial pain-dysfunction.

Attitude↗
PubMed1985

"Glucose effect" and rate limiting function of uroporphyrinogen synthase on porphyrin metabolism in hepatocyte culture: relationship with human acute hepatic porphyrias.

The effect of glucose on drug-promoted induction of porphyrin synthesis was studied in chick embryo liver cell culture with and without the addition of exogenous delta-aminolaevulinic acid (ALA). Induction of ALA synthase was abolished by haemin or glucose. Less than 10% of porphobilinogen is converted into protoporphyrin. Protoporphyrin synthesis cannot be enhanced by high ALA concentrations. The conversion of exogenous ALA into porphyrins decreases with increasing concentrations of ALA from 0.1 to 2.0 mmol/l, whereas porphobilinogen accumulates, thus reflecting the rate limiting function of uroporphyrinogen synthase, which is not influenced by glucose. This needle-eye-like function of uroporphyrinogen synthase within the porphyrin biosynthetic chain explains the urinary increase of ALA and porphobilinogen in the acute phase of variegate and coproporphyria, similar to that in acute intermittent porphyria. The "glucose effect" was also investigated in vivo in humans in 32 courses of hereditary acute hepatic porphyrias (acute intermittent porphyria, variegate porphyria, coproporphyria and porphobilinogen synthase defect porphyria). Patients were treated with high carbohydrate intake (approximately 500 g/24 h), mainly in the form of glucose infusions. There was a resulting consistent and highly significant decrease of porphyrin biosynthesis metabolites, accompanied by clinical improvement in most of the patients.

5-Aminolevulinate Synthetase↗
PubMed1973

Drugs and punished responding. I. Rate-dependent effects under multiple schedules.

The effects of drugs were studied in pigeons whose responses were punished with electric shock during one component of a multiple fixed-interval 5-min fixed-interval 5-min schedule of food presentation. Most of the drugs analyzed for rate-dependent effects increased low rates of both punished and unpunished responding, while increasing higher rates less, or decreasing them; however, low rates of punished responding sometimes were increased more by pentobarbital, diazepam, and chlordiazepoxide than were matched rates of unpunished responding. In contrast, d-amphetamine and chlorpromazine usually increased low rates of unpunished responding more than matched rates of punished responding. These two drugs also decreased high rates of unpunished responding less than they decreased high rates of punished responding. Thus, the effects of drugs on punished responding depend on the control rate of punished responding; however, the rate-dependent effects of drugs on punished responding are not always the same as they are for unpunished responding.

Animals↗
PubMed1976

Effects of set, setting, and sedatives, on reaction time.

The effects of sessions, individual characteristics, group behavior, sedative medications, and pharmacological anticipation, on simple visual and auditory reaction time were evaluated with a randomized block design. The project involved 4 separate small groups of 5 to 9 healthy young adults who met 4 times for 9 hr. over 4 mo. and received 4 drug regimens under controlled conditions. Attitudes toward the experiment, which were mainly related to an early fear of potent drugs and late feelings of weariness, markedly affected reaction time. This effect decreased the test-retest reliability of the instrument, hence its sensitivity. Group behavior, subjective feelings attributable to the medications, and pharmacological anticipation, on the other hand, did not seem to have affected psychomotor performance. The effects of sedatives were much more marked and consistent with reaction time than with subjective responses, which primarily represented the influence of anticipation. This dissociation between objective and subjective behavior indicates that the subjects acted according to the drugs which they had taken but felt according to what they believed they had received.

Anxiety↗
PubMed1976

A prospective study of drugs and pregnancy. I. Psychopharmaca.

A prospective study has been performed on the use of psychopharmaca during 6 376 pregnancies and its correlation to certain socio-medical variables and pregnancy outcome. An association between drug use and later miscarriage or legal abortion was demonstrated and is conceivably due to an increased use of such drugs in unwanted pregnancies. No indication of an association between drug use and birth of a dead or defective infant was found. Pregnancies where psychopharmaca were used during the first trimester had, on average, a longer duration than pregnancies where such drugs were not used, but birth weight of full-term infants was not affected.

Abnormalities, Drug-Induced↗
PubMed1973

Drug screening.

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Amphetamine↗

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