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Yıl:2013; Cilt: 24; Sayı: 2>> Özet
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Türk Psikiyatri Dergisi; 2013;24(2):94-100
Otistik Bireylerde Fenotipik Özellikler: 2D/4D Parmak Oranları,Saç Döneri ve El Baskınlığı Özellikleri
F Aksu, B Baykara, C Ergin, C Arman
Dokuz Eylül Üniv., İzmir.
Amaç: Otistik ve sağlıklı bireylerde el parmak oranları, saç döner yapısı ve el, ayak ve göz baskınlığının karşılaştırılması ve otizme özgü fenotipik özelliklerin belirlenmesidir. Yöntem: Otistik bozukluk tanısı almış 41 erkek hastada ve sağlıklı 121 erkek çocukta her iki elin işaret ve yüzük parmakları, metakarpofalangeal eklemin proksimal kıvrımından parmak ucuna kadar dijital kumpas ile ölçüldü, işaret parmağın uzunluğunun, yüzük parmağın uzunluğuna oranı belirlendi. Hasta ve kontrol grubunda, saç dönerlerinin aralarındaki mesafe, orta sagital hattan dik uzaklıkları ve saat yönüne göre dönüş yönleri hesaplandı. Her iki grupta el, ayak, göz baskınlıkları belirlendi. Sonuçlar SPSS 15.0 ile değerlendirildi. Bulgular: Otizm grubunda saç döneri sayısı kontrol grubuna göre daha fazla bulundu. Özellikle sol el ve sol göz baskınlığı olan otistik bireylerin saç dönerlerinin orta sagital hattan uzaklığı da daha fazlaydı. Otistik ve kontrol gruplarının sağ ve sol el parmak oranları karşılaştırıldığında, gruplar arasında istatistiksel olarak anlamlı farklılık yoktu. Sonuç: Otistik bireylerde saç döneri sayısının kontrol grubundan anlamlı olarak daha fazla olması, sol el ve sol göz baskınlığı olan otistik bireylerin saç dönerlerinin orta sagital hattan daha uzakta yerleşme eğilimi göstermesi çalışmanın özgün bulguları arasındadır ve bu sonuçların otizme özgü fenotiplerin belirlenmesine katkıda bulunacağı düşünülmektedir.
Phenotypic Features in Autistic Individuals: The Finger Length Ratio (2D:4D), Hair Whorl, and Hand Dominance
Objective: The aim of this study was to compare the finger length ratio (2D:4D), hair whorl direction, and hand, foot, and eye dominance in autistic and healthy individuals, and to investigate the phenotypic characteristics of autism. Materials and Methods: The study included 37 males diagnosed with autistic disorder and 121 healthy males, all aged 4-18 years. The length of the index and ring fingers of both hands ? from the proximal bend of the metacarpophalangeal joint to the fingertips ? was measured with digital calipers and the index-ring finger (2D:4D) ratio was determined. The distance between hair whorls, their perpendicular distance from the mid-sagittal line, and their direction of rotation were calculated in the autism and control groups. Hand, foot, and eye dominance were determined in both groups. The findings were evaluated using SPSS v.15.0. Results: The autism group had a greater number of hair whorls than the control group. The distance between hair whorls and the mid-sagittal line was longer in those with left hand and left eye dominance. A significant difference in the 2D:4D ratio of the right and left hands between the 2 groups was not observed. Conclusion: The autism group had more hair whorls than the control group and the hair whorls in the autistic individuals with left hand and left eye dominance were located further from the mid-saggital line. We think that these novel findings might contribute to the determination of the phenotypic features specific to autism.

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