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Biomedical subjects

L J Bloom

Publications and source records attributed to L J Bloom.

23 records · Page 2Linked to original sources
PubMed1975

An experimental investigation of the effectiveness of complementary projection for reducing anxiety.

The present study was designed to determine whether complementary projection is effective to reduce anxiety. To test this, Ss in two experimental groups were threatened with electric shocks. Ss in one threat group then were encouraged to project malevolence onto E. Ss' subjective reports, pulse rates, and skin resistances indicated that the threat of shock significantly increased the anxiety levels of threat as compared to control Ss. Neither the subjective reports nor physiological measures revealed a differential decrease in anxiety in threat Ss as a function of whether Ss projected a justifiable cause for anxiety, i.e., malevolence, onto E. These results raise serious questions as to whether complementary projection serves an anxiety-reducing or defensive function.

Anxiety↗
PubMed1975

Selective autonomic blockade of conditioned and unconditioned cardiovascular changes in rhesus monkeys (Macaca mulatta).

Changes in heart rate and in systolic and diastolic blood pressures were examined in eight rhesus monkeys during six sessions of differential classical conditioning. The conditioned stimuli consisted of tones differing in frequency and the unconditioned stimuli consisted of tail shock. Both the conditioned responses (CRS) and unconditioned responses (UCRs) consisted of increases in heart rate and in systolic and diastolic pressures, but blood pressure CRs sometimes occurred in the absence of heart rate CRs. Graded doses of the selective blocking agents propranolol, phentolamine, and atropine methylnitrate were systemically administered to four of the monkeys prior to additional conditioning sessions. The results suggested that the CRs and UCRs were mediated by both sympathetic and parasympathetic influences.

Adrenergic alpha-Antagonists↗