Hair pulling: a review

Reinhardt, Viktor

doi:10.1258/002367705774286448

Cited by 56 publications

(48 citation statements)

References 41 publications

(28 reference statements)

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“…Beyond that, self-patting became more widespread in the whole study population in the two years following re-socialization, possibly by social transmission. Hair pulling is triggered by long-term exposure to anxiety- and boredom-inducing environments in diverse animal species, from mice to non-human and human primates (reviewed in [41]). Accordingly, hair pulling was the most prevalent self-directed behavior in our study population and did not differ between ED and LD chimpanzees, as all of them spent decades in similar adverse environments.…”

Section: Resultsmentioning

confidence: 99%

Long-Term Evaluation of Abnormal Behavior in Adult Ex-laboratory Chimpanzees (Pan troglodytes) Following Re-socialization

Kalcher-Sommersguter

Franz-Schaider

Preuschoft³

2013

Behavioral Sciences

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Adverse rearing conditions are considered a major factor in the development of abnormal behavior. We investigated the overall levels, the prevalence and the diversity of abnormal behavior of 18 adult former laboratory chimpanzees, who spent about 20 years single caged, over a two-year period following re-socialization. According to the onset of deprivation, the individuals were classified as early deprived (EDs, mean: 1.2 years) or late deprived (LDs, mean: 3.6 years). The results are based on 187.5 hours of scan sampling distributed over three sample periods: subsequent to re-socialization and during the first and second year of group-living. While the overall levels and the diversity of abnormal behavior remained stable over time in this study population, the amplifying effects of age at onset of deprivation became apparent as the overall levels of abnormal behavior of EDs were far above those of LDs in the first and second year of group-living, but not immediately after re-socialization. The most prevalent abnormal behaviors, including eating disorders and self-directed behaviors, however, varied in their occurrence within subjects across the periods. Most important, the significance of social companionship became obvious as the most severe forms of abnormal behavior, such as dissociative and self-injurious behaviors declined.

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Section: Resultsmentioning

confidence: 99%

Long-Term Evaluation of Abnormal Behavior in Adult Ex-laboratory Chimpanzees (Pan troglodytes) Following Re-socialization

Kalcher-Sommersguter

Franz-Schaider

Preuschoft³

2013

Behavioral Sciences

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“…Behavior-associated hair loss has been described in many species including nonhuman primates, sheep, dogs, cats, rabbits, guinea pigs, and laboratory rats and mice (Bresnahan et al , 1983; Honess et al , 2005; Reinhardt, 2005). This behavior has been considered abnormal because it is observed almost exclusively in confined animals.…”

Section: Spontaneous Modelsmentioning

confidence: 99%

Assessing the validity of current mouse genetic models of obsessive–compulsive disorder

Wang

Simpson

Dulawa

2009

Behavioural Pharmacology

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Obsessive–compulsive disorder (OCD) is a disorder characterized by unwanted and intrusive thoughts, images, or impulses and/or repetitive behavior. OCD is a major cause of disability; however, the genetic factors and pathophysiological mechanisms underlying this complex, heterogeneous disorder remain largely unknown. During the past decade, a number of putative mouse genetic models of OCD have been developed for the purpose of studying the neural mechanisms underlying this disorder and developing novel treatments. This review presents and evaluates these experimental preparations to date. Models using knockout or transgenic approaches, as well as those examining variation in genetically diverse populations, are evaluated and discussed.

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“…Nutritional deficiency and exposure to environmental stressors are considered the most common causes of hair pulling and trichophagia in laboratory animals [8,11,12]. However, as all baboons were fed a nutritionally balanced ration with supplemental grains, vegetables and fruits, a nutritional deficiency is unlikely to be responsible for these cases.…”

Section: Discussionmentioning

confidence: 99%

“…Generalized Linear Model analyses were performed using the function 'glm', which is part of the stats package that comes with R (R Development Core Team, Vienna, Austria) [11].…”

Section: Statistical Evaluationmentioning

confidence: 99%

Trichobezoars in baboons

Mejido¹,

Dick²,

Williams³

et al. 2009

Journal of Medical Primatology

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Background There is little information available concerning trichobezoars in the nonhuman primate literature. Methods We evaluated 118 cases of trichobezoar in baboons over a 29 year period at the Southwest National Primate Research Center. Results The anatomic locations affected in decreasing order were the stomach, small intestine, cecum, esophagus, and colon. The most common clinical history was weight loss. The most frequent associated pathology included gastrointestinal inflammation and ulceration, emaciation, peritonitis, intussusception, pneumonia, and aspiration. Trichobezoars were the cause of death in 9 baboons and the reason for euthanasia in 12. Females were 2.14 times more likely than males to be affected. The greater the percentage of group housing time, the more likely the baboon was to develop trichobezoars. Conclusions The baboon may present a useful model to evaluate the etiology, genetic predisposition, physiopathology, neurobiology, and treatment response of trichobezoars.

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Hair pulling: a review

Abstract: PapersThe role of hair in swimming of laboratory mice: implications for behavioural studies in animals with abnormal hair 370 A V Kalueff and P Tuohimaa A novel model for the investigation of orthotopically growing primary and secondary bone tumours using intravital microscopy

Cited by 56 publications

References 41 publications

Long-Term Evaluation of Abnormal Behavior in Adult Ex-laboratory Chimpanzees (Pan troglodytes) Following Re-socialization

Long-Term Evaluation of Abnormal Behavior in Adult Ex-laboratory Chimpanzees (Pan troglodytes) Following Re-socialization

Assessing the validity of current mouse genetic models of obsessive–compulsive disorder

Trichobezoars in baboons

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