Repetitive traumatic dreams remain a curiosity in our working with patients. If dreams have a sleep protecting or problem solving function, the dream that does not resolve but repeats and that disturbs rather than protects sleep remains an important clinical problem. We see in individual patient experiences and in civilian disasters samples of individuals who are unable to return their dream life to a condition in which it no longer repeats or disturbs their sleep. Clearly the recent experience of combat survivors of Vietnam becomes a major concern.

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In 2 studies Gunn rats carrying 2 recessive alleles for jaundice (jj) were compared with their heterozygous littermates (Jj) under varied litter size (4 vs 12 pups) and handling conditions. Handling did not produce long-term effects. Litter size interacted with Genotype to increase the differential response of jj rats by 21, 23, and 50 days of age. A decrease in survival rates and weight gain was found in Jj and especially jj rats from large litters. For jj rats only, being reared in a large litter increased the severity of ataxia. Jaundiced rats from large litters showed less rearing and tended to enter fewer squares than those from small litters whereas Jj littermates showed an equivalent amount of rearing and number of squares entered in large as compared to small litter sizes. Differences between Jj and jj rats in frequency of pivoting were greater in those from large litters than in those from small litters.