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Related Experiment Videos

Vision influences paw-preference in mice

P Barnéoud1, G Bronchti, H Van der Loos

  • 1Institute of Anatomy, University of Lausanne, Switzerland.

Behavioural Brain Research
|June 30, 1994
PubMed
Summary
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Vision influences paw preference in mice during learning. Neonatal eye removal, however, does not affect established handedness, suggesting visual system reorganization.

Area of Science:

  • Neuroscience
  • Animal Behavior
  • Ophthalmology

Background:

  • Handedness, or paw preference, is a well-documented phenomenon in many animal species.
  • The role of sensory input, particularly vision, in the development and expression of motor asymmetries like handedness is not fully understood.

Purpose of the Study:

  • To investigate the influence of vision on the development and expression of handedness in mice.
  • To determine if early-life visual deprivation affects established paw preference.

Main Methods:

  • Adult mice were subjected to a paw-preference test with one eye occluded by a contact lens.
  • A separate group of mice underwent unilateral eye removal at birth and were later tested for paw preference.

Main Results:

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  • Mice with one eye occluded before training showed a preference for the paw ipsilateral to the open eye.
  • Occluding the eye contralateral to the naturally preferred paw did not alter existing paw preference.
  • Neonatal enucleation did not significantly influence the direction or strength of handedness.

Conclusions:

  • Vision plays a role in the learning phase of paw-preference determination.
  • The visual system may reorganize in response to early-life visual deprivation, compensating for the lack of input and preserving established handedness.