This paper reports on an analytical study of the intrinsic shapes of 523 whiskers from 15 rats. We show that the variety of whiskers on a rat's cheek, each of which has different lengths and shapes, can be described by a simple mathematical equation such that each whisker is represented as an interval on the Euler spiral. When all the representative curves of mystacial vibrissae for a single rat are assembled together, they span an interval extending from one coiled domain of the Euler spiral to the other. We additionally find that each whisker makes nearly the same angle of 47 with the normal to the spherical virtual surface formed by the tips of whiskers, which constitutes the rat's tactile sensory shroud or "search space." The implications of the linear curvature model for gaining insight into relationships between growth, form, and function are discussed.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6962041 | PMC |
| http://dx.doi.org/10.1126/sciadv.aax5145 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Disruption of maternal vascular remodeling by a fetal endoretrovirus-derived gene in preeclampsia.
Genome Biol
May 2024
Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China.
Article Synopsis
- Preeclampsia is a serious pregnancy-related condition linked to improper remodeling of blood vessels in the uterus, but its early molecular causes are still not fully understood.
- Research shows that preeclampsia is caused by underdeveloped trophoblasts and endothelial cells due to delayed epigenetic changes, leading to an excessive amount of immature trophoblast cells.
- The study finds that high levels of a gene called PEG10, transferred from trophoblasts to maternal cells, disrupt normal blood vessel development by interfering with TGF-beta signaling, highlighting complex genetic interactions during pregnancy.
Three-dimensional architecture of ESCRT-III flat spirals on the membrane.
Proc Natl Acad Sci U S A
May 2024
School of Life Sciences, Department of Chemical Biology, Southern University of Science and Technology, Shenzhen 518055, China.
The endosomal sorting complexes required for transport (ESCRTs) are responsible for membrane remodeling in many cellular processes, such as multivesicular body biogenesis, viral budding, and cytokinetic abscission. ESCRT-III, the most abundant ESCRT subunit, assembles into flat spirals as the primed state, essential to initiate membrane invagination. However, the three-dimensional architecture of ESCRT-III flat spirals remained vague for decades due to highly curved filaments with a small diameter and a single preferred orientation on the membrane.
View Article and Find Full Text PDFTesting and Analysis of Selected Navigation Parameters of the GNSS/INS System for USV Path Localization during Inland Hydrographic Surveys.
Sensors (Basel)
April 2024
Department of Transport and Logistics, Gdynia Maritime University, Morska 81-87, 81-225 Gdynia, Poland.
One of the main methods of the path localization of moving objects is positioning using Global Navigation Satellite Systems (GNSSs) in cooperation with Inertial Navigation Systems (INSs). Its basic task is to provide high availability, in particular in areas with limited access to satellite signals such as forests, tunnels or urban areas. The aim of the article is to carry out the testing and analysis of selected navigation parameters (3D position coordinates (Northing, Easting, and height) and Euler angles (pitch and roll)) of the GNSS/INS system for Unmanned Surface Vehicle (USV) path localization during inland hydrographic surveys.
View Article and Find Full Text PDFWMS-based near-infrared on-chip acetylene sensor using polymeric SU8 Archimedean spiral waveguide with Euler S-bend.
Spectrochim Acta A Mol Biomol Spectrosc
December 2023
Department of Electrical and Computer Engineering, Rice University, 6100 Main Street, Houston, TX 77005, USA.
SU8 is a cost-effective polymer material that is highly suitable for large-scale fabrication of waveguides. However, it has not been employed for on-chip gas measurement utilizing infrared absorption spectroscopy. In this study, we propose a near-infrared on-chip acetylene (CH) sensor using SU8 polymer spiral waveguides for the first time to our knowledge.
View Article and Find Full Text PDFUltra-High-Resolution Coronary CT Angiography With Photon-Counting Detector CT: Feasibility and Image Characterization.
Invest Radiol
December 2022
From the Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.
Objectives: The aim of this study was to evaluate the feasibility and quality of ultra-high-resolution coronary computed tomography angiography (CCTA) with dual-source photon-counting detector CT (PCD-CT) in patients with a high coronary calcium load, including an analysis of the optimal reconstruction kernel and matrix size.
Materials And Methods: In this institutional review board-approved study, 20 patients (6 women; mean age, 79 ± 10 years; mean body mass index, 25.6 ± 4.
Want 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!