Emmanuel Igho ODOKUMA, Forae GERALD, Clement VHRITERHİRE

Pattern of brain weight in three West African populations

AMAÇ: Beyin ağırlığının kullanımı, üzerinde çalışılan grubun iskelet kalıntılarının kimliklendirilmesinde ve nüfusun ortak kökeninin vurgulanmasında kullanılmaktadır. METOD: Bu çalışmaya yaşları 18 ve üzerine olan 699 kişi (361 erkek, 338 kadın) katılmıştır. Katılımcılar üç farklı halktan Urhobo (erkek 156; kadın 147), Ibo (erkek 141 kadın 145) ve Edo (erkek 64; kadın 46) tabakalı örnekleme yöntemi kullanılarak seçilmiştir. BULGULAR: Beyin ağırlığı standart teknik kullanılarak ölçülmüş, 1318g±139.71g arasında değerler aldığı, en yüksek değerin 1711.00g ve en düşük değerin 958.42g olduğu saptanmıştır. Cinsiyet beyin ağırlılığı üzerinde anlamlı bir etkiye sahiptir (p

Üç Batı Afrika halkının beyin ağırlığı örnekleri

AIM: The usefulness of brain weight in facilitating proper identification of skeletal remains and in emphasizing a common origin of studied populations is far reaching. METHODS: This study involved 699 (male 361; female 338) volunteers whose age ranged 18 years and over. Respondents were selected along three ethnic groups including Urhobo (male 156; female 147), Ibo (male 141 female 145) and Edo (male 64; female 46) and it was ensured that population for the study was collected using a random stratified method. RESULTS: The brain weight was measured using standard techniques and the mean weight was observed to be 1318g±139.71g with maximum value of 1711.00g and minimum value of 958.42g. Gender had a significant effect on brain weight (p<0.05).Male and female values were significantly different (p<0.05). Mean male values were 1386.18g and mean female values were 1251.62g. Brain weight exhibited strong sexual dimorphism and was useful in differentiating inter and intra population groups. In spite of these observations, differences which enabled intracultural differentiation commonly occurred. CONCLUSION: Inevitably therefore, craniometric studies are most essential in the study of population dynamics especially with respect to quantitative variables.

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1. Haack, DC, Meihoff EC. A method for estimation of cranial capacity from cephalometric Roentgnograms. American Journal of Physical Anthropology. 1971; 34: 447-452.
2. Jerrison HJ. The evolution of diversity in brain size. Eds: Hahn, Jensen, Brududec: Development and Evolution of Brain Size. New York. Academic Press, 1979.
3. Howells WW. Skull shapes and the map: craniometric analyses in the dispersion of modern homo. Papers of the Peabody Museum of Archaeology and Ethnology. Cambridge. MA Peabody Museum, 1989, p. 79.
4. Froment A. La différenciation morphologique de l’homme moderne : congruence entre forme du crâne et répartition géographique du peuplement, Comptes Rendus de l’Académie des Sciences. 1992; 315(Série III): 323-329.
5. Lahr MM. The evolution of modern human diversity, a study of cranial variation. Cambridge. Cambridge University Press, 1996.
6. Hiernaux J. Physical anthropology of the living populations of sub-Saharan Africa. Annual Review of Anthropology. 1976; 5: 149-168.
7. Leakey LSB.The stone age races of Kenya. London. Oxford University Press, 1935, p. 150.
8. Coon, CSA. Fossilised human mandibular fragment from Kangatotha, Kenya, East Africa. American Journal of Physical Anthropology. 1971; 34: 157-163.
9. Froment A. Le peuplement de l’Afrique Centrale: contribution de la paléoanthropologie. Eds: Delneuf M, Essomba JM, Froment A: Paléoanthropologie en Afrique centrale: Un Bilan de l’Archéologie au Cameroun. Paris. L’Harmattan, 1998, p. 13–90.
10. Hiernaux J. Peoples of Africa from 22o N to the Equator. Eds: Weiner PT: The biology of human adaptability. Oxford. Oxford University Press, 1966, p. 91-110.
11. Hiernaux J. Bantu expansion: the evidence from physical anthropology confronted with linguistic and archaeological evidence. Journal of African History. 1968; 9: 505–515.
12. Hiernaux J. The People of Africa. London. Weidenfeld and Nicolson Scribners Sons, 1974.
13. Andy IJ. Fundamental statistics for Education and Behavioral Sciences. Oyo State, Nigeria. Kraft Books Limited, 1992.
14. Tyebkhan G. Declaration of Helsinki: The ethical cornerstone of human clinical research. Indian J Dermatol Venereol Leprol. 2003; 69: 245-7.
15. Rushton JP. Cranial capacity related to sex, rank, and race in a stratified random sample of 6,325 U.S. military personnel. Intelligence. 1992; 16, 401-413.
16. Ankney CD. Sex differences in relative brain size: The mismeasure of woman, too? Intelligence. 1992; 16, 329-336.