Abstract:
:Twenty healthy men were asked to walk as straight as possible to a target 60 m away at normal speed. A series of footprints was recorded for each subject by having him wear socks soaked with red ink and walk on white paper fixed flat to the floor. Fourier analysis was applied to determine whether the subjects actually were able to walk straight, and the results revealed that all walked in a sinuous line rather than a straight line. Periodicity and amplitude of the meandering differed from subject to subject. These facts suggest that none of us can walk in a strictly straight line; rather, we meander, primarily due to a slight structural or functional imbalance of our limbs, which produces a gait asymmetry, and secondarily due to feedback from our sense of sight, which acts to correct the shifted walking course.
journal_name
Am J Phys Anthropoljournal_title
American journal of physical anthropologyauthors
Uetake Tdoi
10.1002/ajpa.1330890104subject
Has Abstractpub_date
1992-09-01 00:00:00pages
19-27issue
1eissn
0002-9483issn
1096-8644journal_volume
89pub_type
杂志文章abstract:OBJECTIVES:Although the evolution of the hominin masticatory apparatus has been linked to diet and food processing, the physical connection between neurocranium and lower jaw suggests a role of encephalization in the trend of dental and mandibular reduction. Here, the hypothesis that tooth size and mandibular robustici...
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.23606
更新日期:2018-09-01 00:00:00
abstract::Historical and anthropological data suggest that skeletons excavated from an 11th to 15th century mass grave in Bondy, France, may be those of victims of the Great Plague. Using high-throughput real-time PCR investigation of the dental pulp collected from 14 teeth from five such skeletons, we detected Bartonella quint...
journal_title:American journal of physical anthropology
pub_type: 历史文章,杂志文章
doi:10.1002/ajpa.21510
更新日期:2011-07-01 00:00:00
abstract:OBJECTIVES:The presence of Microchoerus in Sant Cugat de Gavadons (Late Eocene, Ebro Basin, Northeastern Spain) was first noted by M. Crusafont, who described a fragment of maxilla with two teeth that he interpreted as P(4) and M(1) and referred this specimen to the species Microchoerus ornatus. The objective of this w...
journal_title:American journal of physical anthropology
pub_type: 历史文章,杂志文章
doi:10.1002/ajpa.22940
更新日期:2016-05-01 00:00:00
abstract::Dental microwear researchers consider exogenous grit or dust to be an important cause of microscopic wear on primate teeth. No study to date has examined the accumulation of such abrasives on foods eaten by primates in the forest. This investigation introduces a method to collect dust at various heights in the canopy....
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.1330970202
更新日期:1995-06-01 00:00:00
abstract::Two sequences of nucleotides are homologous if they are descended through a chain of replication from a common precursor molecule. Since organs are not copies or transcriptions of organs, the concept of morphological homology has no such simple and unambiguous definition. The theoretical vagueness of morphological hom...
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.1330940109
更新日期:1994-05-01 00:00:00
abstract::A brief description of the exposed middle ear from two Swartkrans specimens demonstrates the feasibility of examining the inner auditory structures of existing fossil hominid material. These Swartkrans fossils provide the first clear view of the early hominid middle ear, and their structures appear to be morphological...
journal_title:American journal of physical anthropology
pub_type: 历史文章,杂志文章
doi:10.1002/ajpa.1330510320
更新日期:1979-09-01 00:00:00
abstract::The discovery that metabolically active brown fat is present in humans throughout ontogeny raises new questions about the interactions between thermoregulatory, metabolic, and skeletal homeostasis. Brown adipose tissue (BAT) is distinct from white adipose tissue (WAT) for its ability to burn, rather than store, energy...
journal_title:American journal of physical anthropology
pub_type: 杂志文章,评审
doi:10.1002/ajpa.22661
更新日期:2015-02-01 00:00:00
abstract::It is often suggested that the frontal sinus morphology of no two individuals is alike, and that the configuration of the frontal sinus is as unique to an individual as his or her fingerprints. However, no empirical, quantitative testing of the uniqueness of frontal sinus outlines has ever been performed. Such testing...
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.20116
更新日期:2005-07-01 00:00:00
abstract::Distribution and variation statistics of hominid endocranial volume (ECV) have been investigated. Within the interpretative constraints imposed by (very) small sample sizes, the requirements for normality are met, as are those for heteroscedasticity. A significant difference in means can be demonstrated for only two c...
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.1330680214
更新日期:1985-10-01 00:00:00
abstract::Mobility and migration patterns of groups and individuals have long been a topic of interest to archaeologists, used for broad explanatory models of cultural change as well as illustrations of historical particularism. The 14th century AD was a tumultuous period of history in Britain, with severely erratic weather pat...
journal_title:American journal of physical anthropology
pub_type: 历史文章,杂志文章
doi:10.1002/ajpa.22194
更新日期:2013-02-01 00:00:00
abstract:OBJECTIVES:Great apes show considerable diversity in socioecology and life history, but knowledge of their physical growth in natural settings is scarce. We characterized linear body size growth in wild mountain gorillas from Volcanoes National Park, Rwanda, a population distinguished by its extreme folivory and accele...
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.23232
更新日期:2017-07-01 00:00:00
abstract::Factors involved in the spread of hepatitis B virus (HBV) in the largely Melanesian population (N = 909) of Graciosa Bay, Ndeni, are examined. Based upon cultural information from Ndeni and ways in which HBV is spread in other populations, certain practices and interactions, predicted as effective routes of HBV infect...
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.1330640306
更新日期:1984-07-01 00:00:00
abstract::In comparing long-bone cross-sectional geometric properties between individuals, percentages of bone length are often used to identify equivalent locations along the diaphysis. In fragmentary specimens where bone lengths cannot be measured, however, these locations must be estimated more indirectly. In this study, we ...
journal_title:American journal of physical anthropology
pub_type: 历史文章,杂志文章
doi:10.1002/ajpa.21153
更新日期:2010-02-01 00:00:00
abstract::Additional fossil Theropithecus remains, recovered from mid to late Pleistocene deposits near Hopefield , South Africa, include portions of the jaws of at least five individuals. Extensive comparisons with fossil Theropithecus from other African sites, including Makapan , Swartkrans , Kanjera , Olorgesailie , and Oldu...
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.1330630408
更新日期:1984-04-01 00:00:00
abstract::A previous study of passive joint mobility in patas monkeys (Erythrocebus patas) showed that laboratory-caged animals had significantly greater mobility in most joints than age/sex matched free-ranging monkeys. Passive joint mobility on 27 of the same animals was measured 6 months after the caged animals were released...
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.1330670102
更新日期:1985-05-01 00:00:00
abstract::The Nariokotome Homo erectus has an apparent disjunction of inferred age as judged by dental maturity, by epiphyseal closure and by stature, when compared to modern human norms. On this basis, it has been suggested that this fossil hominin differed in its pattern of growth and development from modern humans. In partic...
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/(SICI)1096-8644(199909)110:1<81::AID-AJPA7
更新日期:1999-09-01 00:00:00
abstract:OBJECTIVES:Maximum ingested food size (Vb ) is an empirically tested performance variable that can shed light on feeding energetics and adaptation in the masticatory system. Until now, this variable had been tested in strepsirrhines alone among primates. Here, we present the first data on Vb in a broad sample of anthro...
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.22779
更新日期:2015-09-01 00:00:00
abstract::Unlike monozygotic (MZ) twins, dizygotic (DZ) twins develop from separate ova. The resulting twins can have different sires if the fertilizing sperm comes from different males. Routine paternity testing of a pair of same-sexed chimpanzee twins born to a female housed with two males indicated that the twins were sired ...
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.20310
更新日期:2006-05-01 00:00:00
abstract::Previous research has demonstrated that species and subspecies of extant chimpanzees and bonobos can be distinguished on the basis of the shape of their molar crowns. Thus, there is potential for fossil taxa, particularly fossil hominins, to be distinguished at similar taxonomic levels using molar crown morphology. Un...
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.21057
更新日期:2009-10-01 00:00:00
abstract::The anatomic distribution of the Stafne static mandibular bone defect (SSBD) is extended with a description of a cavitation defect on the buccal ramus of the mandible. The anatomical placement of SSBD thus correlates precisely with the submandibular and parotid salivary glands, and gives further evidence that an incre...
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/(SICI)1096-8644(200003)111:3<425::AID-AJPA
更新日期:2000-03-01 00:00:00
abstract::Pliopithecid remains from the Spanish locality of Torrent de Febulines (Late Vallesian, MN 10), consisting of right and left mandibular fragments with partial tooth rows and an isolated P(3) probably belonging to the same individual, are described and assigned to Egarapithecus narcisoi gen. et sp. nov. (Pliopithecidae...
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.1043
更新日期:2001-04-01 00:00:00
abstract::Members of the Cercocebus-Mandrillus clade are united by several morphological features, including expanded premolars which are argued to be associated with a preponderance of hard objects in the diet. We test the association between premolar expansion and hard object feeding by examining how different dental regions ...
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.21402
更新日期:2011-01-01 00:00:00
abstract::Various workers, including T. D. Stewart, claim that the aboriginal Americas were relatively disease-free because of the bering Strait cold-screen, eliminating many pathogens, and the paucity of zoonotic infections because of few domestic animals. Evidence of varying validity suggests that precontact Americns had thei...
journal_title:American journal of physical anthropology
pub_type: 历史文章,杂志文章
doi:10.1002/ajpa.1330450333
更新日期:1976-11-01 00:00:00
abstract::In order to reassess previous hypotheses concerning dental size reduction of the posterior teeth during Pleistocene human evolution, current fossil dental evidence is examined. This evidence includes the large sample of hominid teeth found in recent excavations (1984-1993) in the Sima de los Huesos Middle Pleistocene ...
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.1330960403
更新日期:1995-04-01 00:00:00
abstract::Red blood cell count (RBC), hemoglobin concentration ([Hb]) and hematocrit (Hct) were measured in 303 male Quechua children and adults, aged 6 to 57 years, living a lifestyle as traditional pastoralists and horticulturalists at a mean altitude of 4,200 m in the Southern Peruvian Andes. Values for RBC, [Hb], and Hct in...
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.1330610310
更新日期:1983-07-01 00:00:00
abstract::In placental mammals, pregnancy usually is associated with an increase in maternal androgens, which may significantly impact fetal growth and differentiation, and affect postnatal development and behavior. Owing to their slow life histories and challenging social conditions, determination of maternal androgens and pot...
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.21646
更新日期:2012-02-01 00:00:00
abstract::Since their first discovery, Neandertals have served as an out-group for interpreting human variation. Their out-group role has changed over the years because in spite of the fact that Neandertals are the most abundant of all fossil remains (or perhaps because of this) their interpretation is the most controversial of...
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.20930
更新日期:2009-05-01 00:00:00
abstract::It is well established that some observed patterns of force production in the primate masticatory system match those predicted by a simplified lever model. This model is also commonly invoked in adaptive explanations of craniodental diversity. However, systematic studies of the predictive power of this model are missi...
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/(SICI)1096-8644(199904)108:4<483::AID-AJPA
更新日期:1999-04-01 00:00:00
abstract::The techniques of dental histology provide a method for reconstructing much of the life history of an individual, as accentuated increments visible in polarized light microscopy record incidents of physiological stress during the formation of dental tissues. Combined with counts of the normal periodic growth increment...
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.10089
更新日期:2002-07-01 00:00:00
abstract::Hair slope, whorl, cross and field formation is expressible in a topological form. The mathematical description required suggests an origin for the patterns in a growth process occurring in the upper dermis which determines the patterns of the hair slope. The formulae proposed by Euler, Poincaré and Ludwig are adopted...
journal_title:American journal of physical anthropology
pub_type: 杂志文章
doi:10.1002/ajpa.1330460308
更新日期:1977-05-01 00:00:00