Ordean J Oyen
Biographic Data
| ID | 4679558 |
|---|---|
| NAME | Ordean J Oyen |
| GIVEN NAMES | Ordean J |
| FAMILY NAME | Oyen |
| SIGNATURE | OYEN O J |
| AFFILIATIONS | Texas A&M University |
| VERIFIED | No |
| TOTAL WORKS | 9 |
| TOTAL CITATIONS | 170 |
| AUTHOR COUNT | 9 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1977 |
| LATEST PUBLICATION YEAR | 1989 |
| H-INDEX | 5 |
Live primates and dental replication: New problems and new techniques
Dental microwear analyses are beginning to provide new insights into the intricacies of jaw movement and tooth use in modern and extinct mammals. However, these analyses are also raising new questions that are best answered through studies of live animals with known diets. The process of taking dental impressions from live animals is a difficult one that presents problems different from those encountered in working with museum material. This repo…
In vivo and in vitro turnover in dental microwear
Given the potential usefulness of dental microwear analyses in interpretations of archaeological and paleontological material, it is surprising how little we know about changes in individual microwear features through time. The purpose of this study was to document the turnover in primate dental microwear through in vivo dental studies of monkeys raised on different diets, and through in vitro studies of the abrasive effects of monkey chow biscui…
The Supraorbital Torus: "A Most Remarkable Peculiarity" [and Comments and Replies]
The supraorbital torus is found only in some genera of the primate order. Because no muscles of consequence attach directly to it, it has been considered nonfunctional. However, invitro strain-gauge experiments demonstrate that when the anterior teeth are loaded, the supraorbital region acts as a bent beam, pulled downward on each end by masticatory muscle forces and pushed upward centrally by bite force. Clinical and experimental data indicate t…
Palatal growth in baboons (Papio cynocephalus anubis)
Cortical surface patterns in human and nonhuman primates
An analysis of skulls from several primate species shows that a “worm‐track” surface pattern, first identified in the brow region in fossil adult hominids and subsequently in olive baboons, chimpanzees, and macaques, is also present in numerous other species. Fine cancellous bone and its attendant vermiculate surface pattern have been observed in subadult and adult gelada baboons, gibbons, gorillas, and orangutans as well as in modern Homo sapien…
Sapienization and Speech [and Comments and Reply]
Middle Pleistocene erectus skulls differ from ours in fifteen discrete traits, primary among which are their smaller cranial capacities, flatter and more strongly constructed braincases, larger and more anteriorly projecting faces, and inflected mastoid processes. Back to 40,000 years ago all fossil hominids are of the sapiens desing, while all those clearly older show the erectus pattern. Except for their large brains, Neandertals are of the ere…
Tool-use in free-ranging baboons of Nairobi National Park
Browridge structure and function in extant primates and Neanderthals
The structural characteristics of the supraorbital ridge in three extent primate species and fossil Neanderthals are described in this study. Surface morphology and patterns of trabecular organization as observed in cross‐sectional collections of Papio, Macaca and Pan are compared with similar traits encountered in the Pech de l'Aze infant, Gibraltar child, and La Quina 5, La Chapelle‐aux‐Saints, Broken Hill, Skhul V, Skhul IX, Tabun I and Gibral…
Stereometric craniometry
A method is described whereby three‐dimensional co‐ordinates of points on a cranium can be recorded in terms of azimuth, elevation and radial distance from a selected point. These co‐ordinates can be used to create two‐dimensional representations of single crania, the differences between many crania or growth stages of individuals or series of individuals. The co‐ordinates can be used in more conventional analytic ways in the same way as cartesia…
In vivo and in vitro turnover in dental microwear
Given the potential usefulness of dental microwear analyses in interpretations of archaeological and paleontological material, it is surprising how little we know about changes in individual microwear features through time. The purpose of this study was to document the turnover in primate dental microwear through in vivo dental studies of monkeys raised on different diets, and through in vitro studies of the abrasive effects of monkey chow biscui…
The Supraorbital Torus: "A Most Remarkable Peculiarity" [and Comments and Replies]
The supraorbital torus is found only in some genera of the primate order. Because no muscles of consequence attach directly to it, it has been considered nonfunctional. However, invitro strain-gauge experiments demonstrate that when the anterior teeth are loaded, the supraorbital region acts as a bent beam, pulled downward on each end by masticatory muscle forces and pushed upward centrally by bite force. Clinical and experimental data indicate t…
Live primates and dental replication: New problems and new techniques
Dental microwear analyses are beginning to provide new insights into the intricacies of jaw movement and tooth use in modern and extinct mammals. However, these analyses are also raising new questions that are best answered through studies of live animals with known diets. The process of taking dental impressions from live animals is a difficult one that presents problems different from those encountered in working with museum material. This repo…
Browridge structure and function in extant primates and Neanderthals
The structural characteristics of the supraorbital ridge in three extent primate species and fossil Neanderthals are described in this study. Surface morphology and patterns of trabecular organization as observed in cross‐sectional collections of Papio, Macaca and Pan are compared with similar traits encountered in the Pech de l'Aze infant, Gibraltar child, and La Quina 5, La Chapelle‐aux‐Saints, Broken Hill, Skhul V, Skhul IX, Tabun I and Gibral…
Sapienization and Speech [and Comments and Reply]
Middle Pleistocene erectus skulls differ from ours in fifteen discrete traits, primary among which are their smaller cranial capacities, flatter and more strongly constructed braincases, larger and more anteriorly projecting faces, and inflected mastoid processes. Back to 40,000 years ago all fossil hominids are of the sapiens desing, while all those clearly older show the erectus pattern. Except for their large brains, Neandertals are of the ere…
Cortical surface patterns in human and nonhuman primates
An analysis of skulls from several primate species shows that a “worm‐track” surface pattern, first identified in the brow region in fossil adult hominids and subsequently in olive baboons, chimpanzees, and macaques, is also present in numerous other species. Fine cancellous bone and its attendant vermiculate surface pattern have been observed in subadult and adult gelada baboons, gibbons, gorillas, and orangutans as well as in modern Homo sapien…
Stereometric craniometry
A method is described whereby three‐dimensional co‐ordinates of points on a cranium can be recorded in terms of azimuth, elevation and radial distance from a selected point. These co‐ordinates can be used to create two‐dimensional representations of single crania, the differences between many crania or growth stages of individuals or series of individuals. The co‐ordinates can be used in more conventional analytic ways in the same way as cartesia…
Stereometric craniometry
A method is described whereby three‐dimensional co‐ordinates of points on a cranium can be recorded in terms of azimuth, elevation and radial distance from a selected point. These co‐ordinates can be used to create two‐dimensional representations of single crania, the differences between many crania or growth stages of individuals or series of individuals. The co‐ordinates can be used in more conventional analytic ways in the same way as cartesia…
Tool-use in free-ranging baboons of Nairobi National Park
Browridge structure and function in extant primates and Neanderthals
The structural characteristics of the supraorbital ridge in three extent primate species and fossil Neanderthals are described in this study. Surface morphology and patterns of trabecular organization as observed in cross‐sectional collections of Papio, Macaca and Pan are compared with similar traits encountered in the Pech de l'Aze infant, Gibraltar child, and La Quina 5, La Chapelle‐aux‐Saints, Broken Hill, Skhul V, Skhul IX, Tabun I and Gibral…
Sapienization and Speech [and Comments and Reply]
Middle Pleistocene erectus skulls differ from ours in fifteen discrete traits, primary among which are their smaller cranial capacities, flatter and more strongly constructed braincases, larger and more anteriorly projecting faces, and inflected mastoid processes. Back to 40,000 years ago all fossil hominids are of the sapiens desing, while all those clearly older show the erectus pattern. Except for their large brains, Neandertals are of the ere…
Cortical surface patterns in human and nonhuman primates
An analysis of skulls from several primate species shows that a “worm‐track” surface pattern, first identified in the brow region in fossil adult hominids and subsequently in olive baboons, chimpanzees, and macaques, is also present in numerous other species. Fine cancellous bone and its attendant vermiculate surface pattern have been observed in subadult and adult gelada baboons, gibbons, gorillas, and orangutans as well as in modern Homo sapien…
Palatal growth in baboons (Papio cynocephalus anubis)
The Supraorbital Torus: "A Most Remarkable Peculiarity" [and Comments and Replies]
The supraorbital torus is found only in some genera of the primate order. Because no muscles of consequence attach directly to it, it has been considered nonfunctional. However, invitro strain-gauge experiments demonstrate that when the anterior teeth are loaded, the supraorbital region acts as a bent beam, pulled downward on each end by masticatory muscle forces and pushed upward centrally by bite force. Clinical and experimental data indicate t…
Live primates and dental replication: New problems and new techniques
Dental microwear analyses are beginning to provide new insights into the intricacies of jaw movement and tooth use in modern and extinct mammals. However, these analyses are also raising new questions that are best answered through studies of live animals with known diets. The process of taking dental impressions from live animals is a difficult one that presents problems different from those encountered in working with museum material. This repo…
In vivo and in vitro turnover in dental microwear
Given the potential usefulness of dental microwear analyses in interpretations of archaeological and paleontological material, it is surprising how little we know about changes in individual microwear features through time. The purpose of this study was to document the turnover in primate dental microwear through in vivo dental studies of monkeys raised on different diets, and through in vitro studies of the abrasive effects of monkey chow biscui…
Biology (7 works) · Primate Behavior and Ecology (6 works) · Anatomy (4 works) · Geography (4 works) · Paleontology (4 works) · Paleontology (4 works) · Anatomy (3 works) · Archaeology (3 works) · Ecology (3 works) · Evolutionary biology (3 works)