NECİP KUTLU, TURAN ONUR BAYAZIT, Fahriye MUTLU

Distribution of paw preference in female and male rats: Assessed by a modified version food-reachıng test

Biz, modifiye bir besine uzanma testi kullanarak, erkek ve dişi sıçanlarda pençe tercihi dağılımını çalıştık. Modifiye besine uzanma testi sıçanlarda dört ayaklı pozisyonda besine uzanması sağlayarak pençe tercihi dağılımını yeniden değerlendirildi. Toplam örneklemin (N=165) 86 (%52.12) sağlak, 72 (%43.64) solak ve 7 (%4.24) iki elli olduğu belirlendi. Erkek sıçanların (N=74) 36 (%48.65) sağlak, 35 (%47.30) solak ve 3 (%4.05) iki elli olduğu belirlendi. Dişilerin ise (N=91) 50 (%54.94) sağlak, 37 (%40.66) solak ve 4 (%4.40) iki elli olduğu belirlendi. Sağ eksi sol pençe normal dağılımı sağ ve sol tarafta pik yaparak gaus eğrisine uyuyordu. Dişilerde, erkeklere göre sağlaklığın daha baskın olduğu gözlendi. Erkekler sol pençe tercih dağılımının dişilerdeki sol pençe tercihine göre daha fazla olduğu saptandı. Sağ eksi sol pençe dağılımı U-dağılımı şeklinde değil de insanlarda olduğu gibi J-dağılımı şeklindeydi. Çalışılan sıçanlarda pençe tercihi dağılımının sonuçları, diğer hayvan ve insan el tercihi dağılımıyla benzerdi. Dişi sıçanlarda sağlaklığın baskın olma nedeni olarak hormonal faktörlerin olduğu sonucuna varıldı. Erkeklerde sağ pençe tercihi erkek sol pençe tercihi ve dişilerde sağ ve sol pençe tercihi göre daha az lateralizedir. Genelde erkek beyni dişi beyninden daha çok laterizedir.

Anahtar Kelimeler:

kemirgenler, Muridae, hayvan modelleri, gıdalar, test

Erkek ve dişi sıçanlarda modifiye besine uzanma test yöntemi ile pençe tercih dağılımı

We re-studied the distribution of paw preference in male and female rats using a new food-reaching test. Paw preference was assessed using a modified new version of food reaching task in quadrupedal position. Of the total sample (N=165). Of 165 rats, 86 (52.12%) were right-handed, 72 (43.64%) were left-handed, and 7 (4.24%) were mixed-handed. Of the in male (N=74) 36 (48.65%) were right-handed, 35 (47.30%) were left-handed, and 3 (4.05%) were mixed-handed. The right-minus left paw reaches fitted to gaussian data with two prominent peaks due to right–and left preference. In female (N=91) 50 (54.94%) were right-handed, 37 (40.66%) were left-handed, and 4 (4.40%) were mixed-handed. The female right-preference showed a right-bais compared to males. The males left-preference were more than female left-preference.The distribution of right minus left paw reach was not U-shaped, it was J-shaped like in humans. The results indicate that the distribution of paw preference in rats is similar to that of other animals and to human handedness. It was concluded that there is a right-bias in paw rats, which is caused by the female right-preference under the influence of a biological factor. The right-pawed males were found to be least lateralized than the male left-preference, and female right-and left preference. The brain is in general more lateralized than the female brain.

Keywords:

rodents, Muridae, animal models, foods, tests,

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