Immediate Effects of 33 to 180 Rad/Min (60)Co Exposure on Performance and Blood Pressure in Monkeys

Abstract

Four groups of monkeys received 1000 rads (60)Co at 33, 50, 75, or 180 rad/min wholebody irradiation while performing a delayed matching-to-sample task. Systematic dose rate effects were observed on performance and blood pressure within the initial 20 min postirradiation. The incidence and severity of performance decrement (PD) increased with higher dose rate. The appearance of postirradiation hypotension was systematically delayed and its rate of fall prolonged as dose rate was lower. The hypotension likewise appeared less deep with lower dose rate exposure. Based on the calculated cumulative dose absorbed at the time of symptom appearance two coactive thresholds were proposed to exist: a total dose threshold of approximately 300 rads (midbody measurement), and a dose rate threshold of about 25 rad/min.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1976
Accession Number
ADA038470

Entities

People

  • A. Bruner

Organizations

  • Lovelace Foundation

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Aerospace Medicine
  • Air Force
  • Animals
  • Blood
  • Cardiovascular Physiological Phenomena
  • Classification
  • Dose Rate
  • Education
  • Heart Rate
  • Incapacitation
  • Materials
  • Plastic Explosives
  • Primates
  • Radiation
  • Rhesus Monkeys
  • Weapons
  • Weapons Effects

Readers

  • Brain and Cognitive Science; Experimental Psychology; Cognitive Neuroscience
  • Cardiovascular Physiology
  • Nuclear and Radiation Engineering.