The Dalila effect: C57BL6 mice barber whiskers by plucking

  title={The Dalila effect: C57BL6 mice barber whiskers by plucking},
  author={Justyna Sarna and Richard H. Dyck and Ian Q. Whishaw},
  journal={Behavioural Brain Research},
Group-housed laboratory mice are frequently found with their whiskers and facial hair removed. [...] Key Method The animals were then placed together in an observation box and their social behavior was videorecorded. The videorecording was subjected to frame-by-frame analysis. Barbering was found to occur during acts of mutual grooming. During grooming, one member of a mouse pair removed the vibrissae of the conspecific and did so by grasping individual whiskers with the incisors and plucking them out. Although…Expand
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Neurobiology of Grooming Behavior: An ethological analysis of barbering behavior
Summary “Barbering” is an abnormal behavior in mice. Barbering mice pluck fur and/or whiskers from cage-mates and/or themselves, leaving idiosyncratic patches of hair loss. The behavior is a paradox:
Social and husbandry factors affecting the prevalence and severity of barbering (‘whisker trimming’) by laboratory mice
Abstract Barbering—the plucking of fur or whiskers from cagemates or oneself—is a common form of abnormal repetitive behavior in laboratory mice. It is often viewed as a ‘normal’ behavior of
Barbering in mice: a model for trichotillomania
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Barbering (fur and whisker trimming) by laboratory mice as a model of human trichotillomania and obsessive-compulsive spectrum disorders.
Barbering has excellent face validity as a model of trichotillomania, and may represent a refined and non-invasive model, especially for studies of the complex genetic/environmental etiologies of this disorder.
Social hair pulling in captive rhesus macaques (Macaca mulatta)
The results suggest that social hair pulling is a behavior distinct from either grooming or aggressive behavior, and that it may contribute to alopecia in socially housed macaques.
Whisker dependent responsiveness of C57BL/6J mice to different behavioral test paradigms
The results suggest that vibrissal desensitization in the mice may lead to changes in their affective and cognitive state, and careful inspection of the whisker status of C57BL/6J mice is recommended to increase the reproducibility and reliability of results obtained from behavioral assessments.
Social facial touch in rats.
Whisker trimming disrupted facial alignment and reduced the frequency of interactions, indicating that whisker use, and possibly whisker protraction, is important for rats to orient themselves with respect to one another.
Alopecia Scoring: The Quantitative Assessment of Hair Loss in Captive Macaques
Where hair loss due to hair pulling exists in captive primates, this scoring system provides an easy, rapid, and validated quantitative method, for use in assessing the success of attempts to reduce it via improved husbandry.
Hair pulling: a review
The preemptive correction of husbandry deficiencies causing long-term stress may prevent the development of this bizarre behaviour in healthy subjects.


Whisker trimming behaviour in A2G mice is not prevented by offering means of withdrawal from it
After five weeks, whiskers had regrown in mice separation by the double screen, whereas in the pairs separated by the single screen whiskers remained in part absent, suggesting that 2 mice involved in whisker trimming, either actively or passively, co-operate in this behaviour.
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  • Psychology, Medicine
    Animal behaviour
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Whisker-trimming and facial hair-trimmers were the activities of twenty-two C57BL and two C3H mice, while hair-nibbling was performed by eight C 57BL mice, which may be evidence of the establishment of a social hierarchy.
Whisker trimming by mother cats
Data presented suggest that its occurrence is not as infrequent as initially thought, and that whisker trimming might be associated with a demonstration of dominance.
Whisker trimming in mice
There was some evidence that when females became pregnant they were able to resist whisker trimming by their mates, and the number of animals per cage did not seem to influence this behaviour.
Varieties of paw and digit movement during spontaneous food handling in rats: Postures, bimanual coordination, preferences, and the effect of forelimb cortex lesions
A surprising complexity is revealed in the way in which rats use their paws and digits in manipulating food and the results show that rats have limb preferences in spontaneous food handling and manipulatory dexterity is dependent upon the integrity of the forelimb area of motor cortex.
Evidence for rodent-common and species-typical limb and digit use in eating, derived from a comparative analysis of ten rodent species
The existence of a core pattern of paw and digit use in rodents suggests that skilled limb and paw movements originate at least with the common ancestors of the rodent, and likely the common ancestor to rodent and primate lineages, while species-typical movements suggest specialization/regression of limb use has occurred in a number of mammalian orders.
Increased number and size of dendritic spines in ipsilateral barrel field cortex following unilateral whisker trimming in postnatal rat
The most likely explanation for ipsilateral changes was an increased use of the intact (contralateral) facial pad during postnatal life, in keeping with the notion that activation of a peripheral sensory apparatus during the early postnatal period may have profound effects on the neuronal morphology and structural design of the primary somatosensory cortex.
Vibrissaeless mutant rats with a modular representation of innervated sinus hair follicles in the cerebral cortex
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  • Medicine, Biology
    Experimental Neurology
  • 1992
The role of pre- and postnatal tactile experience is addressed in the development of the rat homologue of the mouse PMBSF using mutants that lack vibrissae to address the variables that result in seemingly different results in these two models.
Play fighting of rats in comparative perspective: a schema for neurobehavioral analyses
A review of the detailed structure of play fighting in rats and other mammals reveals that play fighting is not a unitary activity, but rather has distinct components with each having distinct regulatory mechanisms.
Increased cytochrome oxidase activity of mesencephalic neurons in developing rats displaying methylmercury-induced movement and postural disorders
Decortication on postnatal day 3 did not alter the course of motor impairment or the cytochrome oxidase histopathology, suggesting that the role of neocortex in the pathogenesis of methylmercury-induced movement and postural disorders is minimal.