Objectives: This study examines the relationship of finger ridge-counts to second to fourth digit ratio, which has not yet been definitively demonstrated. The related question of sex dimorphism in finger ridge-counts is further elucidated.
Methods: A sample of Germans, including 1134 males and 1031 females, was examined for sex dimorphism in the finger ridge-counts. Second and fourth digit lengths were measured in a sub-sample of 91 males and 100 females to compute second to fourth digit ratio. Principal component scores were obtained to investigate sex dimorphism and the correlation between ridge-counts and digit ratio. Regression and analysis of covariance were used to investigate relationships.
Results: Males generally have higher ridge-counts than females but subtle dimorphic features emerge from the principal components, such as a contrast between digits 2 and 4, suggesting a ratio analogous to the digit ratio. The most dimorphic feature is digit 1 directional asymmetry, males exhibiting a stronger right bias than females. Digit ratio is significantly related to four principal components, expressing various contrasts among digits. Other relationships involve contrasts between digits 3 and 5 and asymmetry on digit 2.
Conclusions: This paper provides definitive evidence that finger ridge-counts correlate with second to fourth digit ratio. The most important finding is that associations of ridge-counts with digit ratio do not involve commonly used summary counts over all digits. Rather, associations act more locally, in ways paralleling the digit ratio, in others reflecting asymmetry. The results support the idea that prenatal sex hormones affect finger ridge-counts.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/ajhb.23625 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Gait Speed Modifies Efficacy of Home-Based Exercise for Falls in Older Adults with a Previous Fall: Secondary Analysis of a Randomized Controlled Trial.
Phys Ther
January 2025
Aging, Mobility, and Cognitive Neuroscience Laboratory, Department of Physical Therapy, The University of British Columbia, Vancouver, BC, Canada.
Objective: Exercise is an evidence-based strategy for preventing falls. However, its efficacy may vary based on individual characteristics, like gait speed. The study examined whether baseline gait speed modified the effects of home-based exercise on subsequent falls among older adults.
View Article and Find Full Text PDFSpecialty-specific Evaluation of Virtual care Outcomes: A retrospective QUality and safety analysis (S-EVOQUe).
PLOS Digit Health
January 2025
ICES, Toronto, Ontario, Canada.
The objective was to compare specialty-specific 7- and 30-day outcomes between virtual care visits and in-person visits which occurred during the SARS-CoV-2 pandemic. Using administrative data from provincial databases in Ontario, ambulatory care visits occurring virtually and in-person during specific timeframes within the pandemic were analyzed. Virtual care visits were matched with corresponding in-person visits based on multiple baseline patient characteristics.
View Article and Find Full Text PDFMultiscale Analysis of Alzheimer's Disease Using Feature Fusion in Cognitive and Sensory Brain Regions.
Digit Biomark
December 2024
Electrical and Computer Engineering, Western Michigan University, Kalamazoo, MI, USA.
Introduction: This research is focused on early detection of Alzheimer's disease (AD) using a multiscale feature fusion framework, combining biomarkers from memory, vision, and speech regions extracted from magnetic resonance imaging and positron emission tomography images.
Methods: Using 2D gray level co-occurrence matrix (2D-GLCM) texture features, volume, standardized uptake value ratios (SUVR), and obesity from different neuroimaging modalities, the study applies various classifiers, demonstrating a feature importance analysis in each region of interest. The research employs four classifiers, namely linear support vector machine, linear discriminant analysis, logistic regression (LR), and logistic regression with stochastic gradient descent (LRSGD) classifiers, to determine feature importance, leading to subsequent validation using a probabilistic neural network classifier.
Development of 1,2,3-triazole hybrids as multi-faced anticancer agents co-targeting EGFR/mTOR pathway and tubulin depolymerization.
Bioorg Chem
January 2025
Medicinal Chemistry Department, Faculty of Pharmacy, Suez Canal University, Ismailia 41522 Egypt. Electronic address:
Novel 1,2,3-triazole hybrids bearing various substituents have been synthesized as potential anticancer agents. Ligand-based approach has been adopted to design these compounds relying on the hybridization of 1,2,3-triazole with α,β-unsaturated carbonyl, 5- and 6-membered heterocyclic scaffolds. All synthesized members were investigated for their cytotoxic potency against nine types comprising 60 panels of human cancerous cells by the US National Cancer Institute: Development Therapeutic Program (US_NCI_DTP).
View Article and Find Full Text PDFThe 2D:4D ratios in the mothers of children with attention deficit hyperactivity disorder.
Early Hum Dev
January 2025
Department of Psychiatry, Alanya Education and Research Hospital, Antalya 07425, Turkey.
Background: Prenatal exposure to high levels of testosterone affects the development of the brain. The purpose of this study was to compare the mothers of children with attention deficit hyperactivity disorder (ADHD) and those of healthy children in terms of the digit ratio (2D:4D). It also examines the relationship between ADHD symptoms and the 2D:4D in mothers.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!