The relationship between digit ratio and circadian typology among medical students

İŞMAN, Çağla; GÜLEN, Şebnem; GÜNDOĞAN, Nimet

The relationship between digit ratio and circadian typology among medical students

Çağla İŞMAN, (Başkent Üniversitesi, Tıp Fakültesi, Fizyoloji Anabilim Dalı, Ankara, Türkiye)

Şebnem GÜLEN, (Başkent Üniversitesi, Tıp Fakültesi, Fizyoloji Anabilim Dalı, Ankara, Türkiye)

Nimet GÜNDOĞAN (Başkent Üniversitesi, Tıp Fakültesi, Fizyoloji Anabilim Dalı, Ankara, Türkiye)

Trakya Üniversitesi Tıp Fakültesi Dergisi

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Yıl: 2010 Cilt: 27 Sayı: 1 Sayfa Aralığı: 68 - 73 Metin Dili: Türkçe İndeks Tarihi: 29-07-2022

The relationship between digit ratio and circadian typology among medical students

Öz:

Amaç: Sabahçıl-akşamcıl tercihi bireyler arasında gözlenen belirgin kronobiyolojik farklılıkların temel dayanağıdır. Bu çalışma fetal testosteron maruziyetinin sirkadyen tiopolojiye özgü seksüel dimorfizmdeki olası nedensel rolünü araştırmak üzere tasarlandı.Gereçler ve Yöntemler: Çalışmaya toplam 183 öğrenci (111 kadın, 72 erkek; ort. yaş 20.7) dahil edildi. Sirkadyen tip dağılımları Horne-Ostberg Sabahçıl-Akşamcıl Anketi'nin Türkçe versiyonu kullanılarak belirlendi. El parmak oranı (2D/4D) ise 0.01 mm hassasiyeti olan dijital kaliper kullanılarak elde edilen 2. ve 4. parmak uzunlukları oranlanarak hesaplandı.Bulgular: Sirkadyen tipoloji değerlendirildiğinde, ara tipin %54.6 (n=100), sabahçıl tipin %29.5 (n=54) ve akşamcıl tipin %15.8 (n=29) oranında temsil edildiği belirlendi. 2D/4D oranı her iki elde de, erkek öğrencilerde kadın öğrencilere göre belirgin şekilde daha düşük bulundu (p<0.001). Benzer şekilde her iki el için saptanan 2D/4D oranları, sabahçıl öğrencilerde; ara-tipte olan (p<0.001) ve akşamcıl (sol elde p<0.05 ve sağ elde p<0.01) öğrencilere göre anlamlı şekilde daha yüksek bulundu. Sabahçıl tip kadınlar arasında daha yaygındı (%35.1 ile %20.8; p<0.05). Her iki cinste de daha yüksek 2D/4D oranı sabahçıl tipoloji ile uyumlu bulundu.Sonuç: Fizyolojik olarak el parmak oranı (2D/4D) ile temsil edilen fetal hayatta maruz kalınan testosteron düzeyinin, sirkadyen tipolojiye özgü seksüel dimorfizmde belirleyici rolü olabileceği düşünüldü.

Anahtar Kelime:

Konular: Genel ve Dahili Tıp

Tıp fakültesi öğrencilerinde el-parmak oranı (2D/4D) ve sirkadyen tipoloji arasındaki ilişki

Öz:

Objectives: Morningness-eveningness preference stands for interindividual chronobiological differences. This study was designed to investigate if prenatal testosterone exposure is a candidate for having a causal role in sexual dimorphism observed in circadian typology.Materials and Methods: A total of 183 students (111 females, 72 males; mean age 20.7 years) were involved in the study. Circadian typology was assessed using the Horne-Ostberg Morningness-Eveningness Questionnaire. Digit lenghts were measured with digital calipers and digit ratio (2D/4D) was calculated by dividing the length of the second digit by that of the fourth digit.Results: Circadian typology assessment revealed 54 morning-(29.5%), 100 intermediate-(54.6%) and 29 evening-(15.8%) type students. Digit ratio of both hands in males were significantly lower than females (p<0.001). Digit ratio for both hands in morningness trait were significantly higher than intermediate (p<0.001) and eveningness (p<0.05 for the left and p<0.01 for the right hand) traits. Morning type was more common among females (35.1% vs 20.8%; p<0.05). Higher digit ratio was significantly associated with the morning type for both of the hands in both genders.Conclusion: Prenatal testosterone exposure, represented by digit ratio (2D/4D) as a proxy marker, seems to have a causal role in sexual dimorphism observed in the circadian typology preferences.

Anahtar Kelime:

Konular: Genel ve Dahili Tıp

Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık

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APA	İŞMAN Ç, GÜLEN Ş, GÜNDOĞAN N (2010). The relationship between digit ratio and circadian typology among medical students. , 68 - 73.
Chicago	İŞMAN Çağla,GÜLEN Şebnem,GÜNDOĞAN Nimet The relationship between digit ratio and circadian typology among medical students. (2010): 68 - 73.
MLA	İŞMAN Çağla,GÜLEN Şebnem,GÜNDOĞAN Nimet The relationship between digit ratio and circadian typology among medical students. , 2010, ss.68 - 73.
AMA	İŞMAN Ç,GÜLEN Ş,GÜNDOĞAN N The relationship between digit ratio and circadian typology among medical students. . 2010; 68 - 73.
Vancouver	İŞMAN Ç,GÜLEN Ş,GÜNDOĞAN N The relationship between digit ratio and circadian typology among medical students. . 2010; 68 - 73.
IEEE	İŞMAN Ç,GÜLEN Ş,GÜNDOĞAN N "The relationship between digit ratio and circadian typology among medical students." , ss.68 - 73, 2010.
ISNAD	İŞMAN, Çağla vd. "The relationship between digit ratio and circadian typology among medical students". (2010), 68-73.

APA	İŞMAN Ç, GÜLEN Ş, GÜNDOĞAN N (2010). The relationship between digit ratio and circadian typology among medical students. Trakya Üniversitesi Tıp Fakültesi Dergisi, 27(1), 68 - 73.
Chicago	İŞMAN Çağla,GÜLEN Şebnem,GÜNDOĞAN Nimet The relationship between digit ratio and circadian typology among medical students. Trakya Üniversitesi Tıp Fakültesi Dergisi 27, no.1 (2010): 68 - 73.
MLA	İŞMAN Çağla,GÜLEN Şebnem,GÜNDOĞAN Nimet The relationship between digit ratio and circadian typology among medical students. Trakya Üniversitesi Tıp Fakültesi Dergisi, vol.27, no.1, 2010, ss.68 - 73.
AMA	İŞMAN Ç,GÜLEN Ş,GÜNDOĞAN N The relationship between digit ratio and circadian typology among medical students. Trakya Üniversitesi Tıp Fakültesi Dergisi. 2010; 27(1): 68 - 73.
Vancouver	İŞMAN Ç,GÜLEN Ş,GÜNDOĞAN N The relationship between digit ratio and circadian typology among medical students. Trakya Üniversitesi Tıp Fakültesi Dergisi. 2010; 27(1): 68 - 73.
IEEE	İŞMAN Ç,GÜLEN Ş,GÜNDOĞAN N "The relationship between digit ratio and circadian typology among medical students." Trakya Üniversitesi Tıp Fakültesi Dergisi, 27, ss.68 - 73, 2010.
ISNAD	İŞMAN, Çağla vd. "The relationship between digit ratio and circadian typology among medical students". Trakya Üniversitesi Tıp Fakültesi Dergisi 27/1 (2010), 68-73.