+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Morphological adaptation to climate in modern Homo sapiens crania: the importance of basicranial breadth

, : Morphological adaptation to climate in modern Homo sapiens crania: the importance of basicranial breadth. Collegium Antropologicum 35(3): 625-636

The aim of this study is to investigate whether the variation in breadth of the cranial base among modern human populations that inhabit different regions of the world is linked with climatic adaptation. This work provides an examination of two hypotheses. The first hypothesis is that the correlation between basicranial breadth and ambient temperature is stronger than the correlation between temperature and other neurocranial variables, such as maximum cranial breadth, maximum neurocranial length, and the endocranial volume. The second hypothesis is that the correlation between the breadth of the cranial base and the ambient temperature is significant even when other neurocranial features used in this study (including the size of the neurocranium) are constant. For the sake of this research, the necessary neurocranial variables for fourteen human populations living in diverse environments were obtained from Howells' data (except for endocranial volume which was obtained by means of estimation). The ambient temperature (more precisely, the mean yearly temperature) of the environments inhabited by these populations was used as a major climatic factor. Data were analysed using Pearson correlation coefficients, linear regression and partial correlation analyses. The results supported the two hypotheses, thus suggesting that ambient temperature may contribute to the observed differences in the breadth of the cranial base in the studied modern humans.


PMID: 22053534

Other references

Mizgajska, H.; Rejmenciak, A., 1997: Differentiation of eggs of Toxocara canis and Toxocara cati - parasites of dog and cat Rozroznianie jaj Toxocara canis i Toxocara cati - pasozytow psa i kota. The differentiation of T. canis and T. cati eggs is an important problem in epidemiology. It has been demonstrated that it is possible to differentiate the species of Toxocara spp. eggs using light microscope and evaluating the morphological featu...

Fletcher, L., 1996: Palliative care. Where there's a will. Nursing Times 92(51): 40-41

Raynor, G.S.; Ogden, E.C.; Hayes, J.V., 1968: Effect of a local source on ragweed pollen concentrations from background sources. Journal of Allergy 41(4): 217-225

Swann, D.R., 1988: Re: "Free alcohol policy". Canadian Journal of Public Health 79(5): 396-397

Gow, N.A.R.; Brown, A.J.P.; Buurman, E.T.; Haeusler, A.; Hube, B.; Gooday, G.W.; Perera, T.H.S.; Westwater, C., 1995: Molecular and cellular determinants for the recognition, attachment and penetration of epithelia by Candida albicans. Journal of Cellular Biochemistry Supplement 0(19B): 152

Gescinskaja, M.A., 1960: Digestive function of the pancreas in sheep. 2. Part 1 was published in Trudy Novocerkassk. zooteh.-vet. Inst., 1958, 11. In it the preparation of a pancreatic fistula in the sheep was described. 2. Pancreatic secretion was continuous but was increased during eating and was abolished by atropin...

Otroshchenko, V.A.; Surkov YuA, 1974: The possibility of organic molecule formation in the Venus atmosphere. Origins of Life 5(3): 487-490

Rimkiene, S., 1984: Accumulation of ascorbic acid in Petasites hybridus and Petasites spurius growing naturally in the Lithuanian SSR. Darbai Lietuvos TSR Mokslu Akademijos Serija C = Trudy Akademiia Nauk Litovskoi SSR Seriia V(4): 48-52

Lybeck, B.R., 1959: Winter Freezing in Relation to the Rise of Sap in Tall Trees. Freezing of water under tension in a fine glass capillary resulted in bubble formation and breaking of the cohesion. Gas bubbles were formed also in tracheids of spruce wood when frozen and thawed. Supercooling in cut twigs of gymnosperms was prod...

Karunasena, E.; Markham, N.; Brasel, T.; Cooley, J.D.nny; Straus, D.C., 2001: Evaluation of fungal growth on cellulose-containing and inorganic ceiling tile. Buildings with poor indoor air quality (IAQ) frequently have many areas with surface fungal contamination. Studies have demonstrated that certain fungal genera (e.g., Cladosporium, Penicillium, and Stachybotrys) are able to grow on building materi...