Articles tagged with Human Anatomy
A recent study has found that healthy emmetropic women have wider pupil diameters than men. The research analyzed anatomical indexes in a large sample of 379 emmetropic subjects, revealing differences between gender.
A recent study published in The Journal of Sexual Medicine has confirmed the anatomic existence of the G-spot, a previously elusive structure. The G-spot was found to be a well-delineated sac structure located on the dorsal perineal membrane, measuring 8.1mm x 3.6mm x 0.4mm in dimensions.
Researchers discovered genetic material from extinct archaic humans, including Denisovans, contributing to present-day African populations. The study suggests that contemporary Africans contain about 2 percent of archaic DNA, which may hold beneficial genes for human physiology and disease resistance.
A team of researchers led by Michael Hammer found evidence of hybridization between modern humans and archaic forms in Africa. Contemporary African populations contain small proportions of genetic material brought in by an archaic population that split from the ancestors of anatomically modern humans about 700,000 years ago.
Ralph Roskies, PSC's scientific co-director, has been appointed to the National Library of Medicine's Board of Regents for a four-year term. He brings expertise in bioinformatics and high-performance computing to the role.
The American Association for Anatomy's ASCES journal has secured the number one ranking in Education, Scientific Disciplines with its debut impact factor of 2.976. The journal provides an international forum for anatomy education research, attracting contributions from top researchers worldwide.
The Gray's Anatomy for Students App is a clinically-oriented textbook for human anatomy, featuring over 1,000-color illustrations and various interactive features. The app provides access to the latest edition of Gray's Anatomy for Students, Second Edition, with updates from a team of authors and an international advisory board.
Women show greater improvements in function and reduced pain than men at three and six months post-surgery. After a year, men recover as well as women, indicating that gender-specific knee implants may not be necessary.
A previously unknown fossil primate, Mescalerolemur horneri, has been discovered in West Texas, dating back to the Eocene Epoch. The species is closely related to Eurasian and African adapiforms, challenging current understanding of North American primates.
Bjorn R. Olsen, Richard Drake, and Gary C. Schoenwolf received the highest awards from the American Association of Anatomists for their outstanding contributions to anatomical sciences, with Olsen receiving the Scientific Achievement Award, Drake the Distinguished Educator Award, and Schoenwolf the Exemplary Service Award.
A study comparing pelvic anatomy after robotic-assisted radical prostatectomy (RARP) and open prostatectomy found significant differences in pelvic distances. These findings may impact post-operative radiation therapy for patients requiring this treatment.
Fossil discoveries from the last decade are being reevaluated by biological anthropologists who argue that some fossils may not be human ancestors. The authors propose a more nuanced explanation, considering alternative interpretations and shared characteristics with other species.
Joseph W. Sanger, T. Vidhya Persaud, and Richard B. Marchase received the highest honors from the American Association for Anatomy for their unique contributions to anatomical sciences. The awards recognize exceptional service and meritorious achievements in education, research, and scientific advancements.
A symposium at the American Association of Anatomists' Annual Meeting explores the evolution of human evolution through ancient mummies, skulls, and bones. Modern technology enables researchers to examine mummified remains without harming tissue, providing insights into disease evolution and death causes.
A newly analyzed 47-million-year-old Darwinius fossil was found to not be a human ancestor, contrary to previous claims. The fossil is now believed to be a forebearer of modern-day lemurs and lorises, according to two papers published in the Journal of Human Evolution.
A 30,000-year-old child's teeth found in Portugal provide insight into the evolution of modern humans and their relationship with Neanderthals. The analysis reveals that early modern humans had a different dental anatomy compared to recent humans, with greater volumes of dentin and pulp but less enamel.
The 4.4 million-year-old skeleton of Ardipithecus ramidus challenges previous understanding of early human evolution, showing the earliest hominids were bipedal but not as agile in trees as chimpanzees. The discovery also suggests a more amicable relationship among males, with potential for pair-bonded couples and shared food gathering.
A study published in BMC Family Practice found that most people lack basic knowledge of human anatomy. Approximately half of the participants correctly identified the location of major organs, highlighting potential problems in doctor-patient communication and diagnosis.
Researchers analyzed transtibial and anteromedial portal drilling techniques for ACL reconstruction, finding that anteromedial portal drilling allowed for better native ACL footprint restoration and knee stability. Re-reaming of the tibial tunnel was also a significant issue with conventional transtibial techniques.
The Ileret footprints, found in Kenya, display human-like arch and short toes associated with an upright bipedal stance. The prints are attributed to Homo ergaster or early Homo erectus, a hominid with body proportions similar to modern humans.
TheVisualMD.com offers interactive 3D visualizations of the cardiovascular system and various disease states. The platform provides a rich visual experience for professionals and patients to increase understanding and compliance.
A 28,000-year-old Cro-Magnoid individual from Southern Italy exhibits anatomical and genetic characteristics similar to those of modern Europeans. The study challenges the long-held assumption that Neandertals are the ancestors of modern Europeans.
A new rodent study finds exposure to diacetyl, a chemical in artificial butter flavoring, can cause respiratory issues in mice. The research suggests workplace exposure to diacetyl may contribute to the development of obstructive bronchiolitis (OB) in humans.
Men with bladder exstrophy report more robust sexual lives than women, with two-thirds of women experiencing moderate to severe dissatisfaction. Researchers aim to tweak surgical techniques to prevent sexual dysfunction in women.
The study found that the H5N1 virus not only affects the respiratory system but also spreads to the gastrointestinal tract, immune system, and central nervous system. In one case, the virus was transmitted from mother to fetus through the placenta.
The 2007 International Science and Engineering Visualization Challenge has selected its top winning entries, featuring visually striking images that showcase the beauty of science. The contest, sponsored by AAAS and NSF, honors artists who use visual media to promote scientific research.
Researchers study retinoic acid-induced craniofacial malformations in mouse embryos to uncover the underlying mechanisms. They observe that these defects can transform into jaw apparatus structures resembling those found in other species, suggesting a common regulatory signaling mechanism governing jaw development across evolution.
Researchers at Duke University found that music tones correspond to the same numerical ratios as human speech frequencies. The study suggests that our ears favor these relationships due to exposure through everyday speech. This discovery may explain why certain tuning schemes sound more natural, like just intonation.
A new study reveals that modern humans first arrived in Europe around 45,000 years ago, with evidence of stone, bone and ivory tools found in Russia. The discovery includes a carved piece of mammoth ivory believed to be the oldest figurative art ever discovered.
A recent study by Erik Trinkaus reveals that modern humans possess twice as many uniquely derived traits than Neandertals, challenging the conventional understanding of human evolution. The research focuses on examining genetic markers in fossil records to better comprehend human ancestry.
Researchers have discovered that beads date back between 100,000 to 135,000 years ago, indicating a sophisticated level of symbolic thinking in early humans. This finding has major implications for understanding the origins of behaviorally modern humans and their ability to use symbols.
A study published in Nature found that cells deep within the human respiratory system have surface molecules that allow the avian flu virus to enter and infect cells, but not easily transmit between humans. The discovery provides a possible explanation for why bird flu is rarely transmitted among humans.
Researchers found early humans started using supportive footwear around 26,000 years ago to reduce toe bone strength. This change was likely caused by the introduction of protective footwear, which reduced the roll of the little toes and weakened them over time.
A 2002 survey found that over 80% of medical school department chairs struggle to recruit faculty for teaching anatomy, citing research contributions as a major obstacle. However, the pipeline is qualified, and incentives can encourage new faculty members to teach gross anatomy.
Scientists have identified a positive feedback loop in rat whiskers that helps gather sensory information, potentially leading to new treatments for blepharospasm. The discovery could also deepen understanding of the human eyeblink circuit and its connection to neural circuits.
Researchers used 3D MDCT to evaluate patients before surgery and found that abnormal liver artery anatomy increases the risk of complications after a transplant. The study analyzed over 80 patients and found that those with variant anatomy were more likely to experience post-surgical complications.
Researchers argue that running played a key role in human evolution, favoring the survival of early humans who could cover long distances. The study identified 26 traits that enhanced running ability, such as leg and foot structure and skeletal features that make the body stronger and more stable.
A virtual reality-based surgery simulator will allow surgeons to practice manipulating 3-D models of human organs using their sense of touch and vision, reducing operating room errors and improving patient outcomes. The simulator uses a novel computational technique to model human tissue and provide realistic touch feedback.
Researchers discovered a myosin gene mutation that correlates with anatomical changes in early hominid fossil record, including smaller jaw muscles and larger brain size. The mutation, estimated at 2.5 million years ago, may have lifted an evolutionary constraint on brain growth in early humans.
A newly discovered fossil from Tanzania provides a key anatomical link between two other known specimens, H. rudolfensis and the original H. habilis type specimen. The discovery reshuffles our understanding of early human ancestry, suggesting that all three specimens are likely members of the same species - Homo habilis.
Excavations at Kostenki in Russia reveal that anatomically modern humans were developing new technologies for survival in the cold region around 30,000 to 40,000 years ago. The discoveries include bone and ivory needles with eyelets, as well as trapping techniques for obtaining furs.
The skeleton previously identified as King Philip II has been proven to be one of Alexander's half-brothers, specifically Philip III Arrhidaeus. Researchers used macrophotography and forensic analysis to rule out the original theory, citing normal anatomical features and incorrect reconstruction that led to the mistaken identity.
Researchers have mapped the functional organization of the hippocampus, a critical area for short-term memory, using microelectrodes to record electrical impulses from individual neurons. The study shows that different portions of the hippocampus are active at different times depending on the type of memory function required.