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    Öğe
    Evaluation of Hand Asymmetry in Relation to Hand Preference
    (Collegium Antropologicum, 2011) Barut, Cagatay; Sevinc, Ozdemir; Sumbuloglu, Vildan
    We evaluated the asymmetric hand measurements in right- and left-handed individuals. 343 men and 290 women aged 18-42 years (22.11 +/- 2.07) participated in the study. There were no statistically significant differences when right left differences in hand length, third finger length, pal mar length, and the digit index value were evaluated according to hand preference and sex. Statistically significant differences were found for right left differences in hand width, hand-shape index, and the pal mar length/width according to hand preference. The strong left-handers, weak left-handers, and ambidextrous individuals in the study group all exhibited asymmetry favoring the left and were considered together. Similarly, the strong and weak right-handers exhibited asymmetry favoring the right hand and were considered together. The difference between these two groups was significant. When the data were evaluated according to sex, significant differences were found between the subgroups. In particular, right left differences in the hand-shape index and palmar length/width values of the strong left-handers, weak left-handers, and ambidextrous individuals were found to be statistically significant according to sex; in contrast, the strong and weak right-handers showed no significant differences according to sex. These results suggest a relation of hand asymmetry to hand preference in a Turkish population.
  • [ X ]
    Öğe
    Hand-grip strenghts in right- and left-handers with different degrees of hand preferences
    (2008) Barut, Cagatay; Sevinc, Ozdemir; Ozer, Cenk Murat; Sumbuloglu, Vildan
    We evaluated hand grip- strength in right- and left-handed individuals with different degrees of preferences. Six hundred and thirty-three individuals (343 men, 290 women) aged between 18 and 42 years (22.11±2,07) participated. Hand preference was determined using the Edinburgh Handedness Inventory. A hydraulic hand dynamometer was used to measure the grip-strengths, while sitting with the elbow in 90° flexion and the forearm in semi-pronation, lying on an arm rest. The mean value of three trials was recorded. Statistically significant differences were observed among strongly right-handed men, weakly right-handed men, ambidextrous men, weakly left-handed men, and strongly left-handed men for right-hand grip strength. The differences between strong left- and strong right-handed men, weak right-handed and strong left-handed men, ambidextrous, and strong left-handed men were the primary reasons for the significance. No statistically significant difference was found among the different hand preference groups of men for the left hand, and no statistically significant difference was detected among different hand preference groups of women for either hand. Our study provides insight into the relationship between handedness and hand performance based on grip strength in a Turkish population. © Universitätsverlag Ulm GmbH 2008.
  • [ X ]
    Öğe
    Hand-grip Strengths in Right- and Left-handers with Different Degrees of Hand Preferences
    (Universitatsverlag Ulm Gmbh, 2008) Barut, Cagatay; Sevinc, Ozdemir; Ozer, Cenk Murat; Sumbuloglu, Vildan
    We evaluated hand grip- strength in right- and left-handed individuals with different degrees of preferences. Six hundred and thirty-three individuals (343 men, 290 women) aged between 18 and 42 years (22.11 +/- 2.07) participated. Hand preference was determined using the Edinburgh Handedness Inventory. A hydraulic hand dynamometer was used to measure the grip-strengths, while sitting with the elbow in 90 degrees flexion and the Forearm in semi-pronation, lying on ail arm rest. The mean value of three trials was recorded. Statistically significant differences were observed among strongly right-handed men, weakly right-handed men, ambidextrous men, weakly left-handed men, and strongly left-handed men for right-hand grip strength. The differences between strong left- and strong right-handed men, weak right-handed and strong left-handed men, ambidextrous, and strong left-handed men were the primary reasons for the significance. No statistically significant difference was found among the different hand preference groups of men for the left hand, and no statistically significant difference was detected among different hand preference,groups of women for either hand. Our study provides insight into the relationship between handedness and hand performance based on grip strength in a Turkish population.