Comparison of manual dexterity in individuals with distinct laterality
DOI:
https://doi.org/10.36453/cefe.2021191.a26831Keywords:
Destreza manual, Laterality, Motor controlAbstract
BACKGROUND: A manual dexterity can be defined as the skill and ease of using the hands, such as writing, strumming a musical instrument, throwing and catching. Laterality can be conceptualized as the preference of use by one of the members over the other and it is confirmed, for example, in right-handed and left-handed individuals, influencing the different performances of the hands.
OBJECTIVE: To compare manual dexterity in right-handed and left-handed users by placing and removing pins in the Grooved Pegboard Test.
METHODS: The sample consisted of 20 healthy volunteers, of both sexes, aged between 18 and 40 years, divided into two groups: 5 men and 5 women from the right population and 5 men and 5 women from the population left-handed. Regarding the lateral dominance index, right-handed individuals had an average index of 97% and left-handed individuals, 91%, in the Edinburgh Lateral Dominance Inventory.
RESULTS: In the condition of placing the pins, differences were observed between the right-handed [t(df=9)=-7.16; p=0.01] and left-handed [t(df =9)=4.80; p=0.01], where the use of the preferred hand showed better performance related to the use of the non-preferred hand. As for the condition of removing the pins, no difference was observed between the right and left hands for the right-handed [t(df=9)=-1.96; p=0.08] and neither for the left-handed [t(df=9)=1.27; p=0.23]. Regarding the asymmetry index, no differences were observed between the groups, although it seems that the asymmetries stand out in tasks where the cognitive demand is greater than the energy demand.
CONCLUSION: The performance in the tasks of manual dexterity was different for the preferred hand for both right-handed and left-handed people, with the preferred hand presenting a better performance when compared to the non-preferred hand.
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