On the Motions and Sounds of the Heart.

Prov Med Surg J (1840)

Published: August 1841

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2489318PMC
http://dx.doi.org/10.1136/bmj.s1-2.46.389DOI Listing

Publication Analysis

Top Keywords

motions sounds
4
sounds heart
4
motions
1
heart
1

Similar Publications

Beta oscillations predict the envelope sharpness in a rhythmic beat sequence.

Sci Rep

January 2025

RITMO Centre for Interdisciplinary Studies in Rhythm, Time and Motion, University of Oslo, Forskningsveien 3A, Oslo, 0373, Norway.

Periodic sensory inputs entrain oscillatory brain activity, reflecting a neural mechanism that might be fundamental to temporal prediction and perception. Most environmental rhythms and patterns in human behavior, such as walking, dancing, and speech do not, however, display strict isochrony but are instead quasi-periodic. Research has shown that neural tracking of speech is driven by modulations of the amplitude envelope, especially via sharp acoustic edges, which serve as prominent temporal landmarks.

View Article and Find Full Text PDF

: This study explores how thoracic orientation affects lung pressure and injury outcomes from shock waves, building on earlier research that suggested human posture impacts injury severity. : A layered finite element model of the chest was constructed based on the Chinese Visual Human Dataset (CVH), including the rib and intercostal muscle layers. The dynamic response of the chest under 12 different angle-oriented shock waves under incident pressures of 200 kPa and 500 kPa was calculated.

View Article and Find Full Text PDF

Hypothesis: Proximal humerus fractures present a treatment challenge due to varied fracture configurations and a lack of consensus on optimal management. Locking plate designs offer promising solutions, yet technical guidelines for successful outcomes remain elusive. Complications are common, with fixation-related failures often attributed to varus collapse.

View Article and Find Full Text PDF

Narrow elliptical motion at the outer hair cell-Deiters' cell junction explains disparate features of uniaxial displacement measurements.

Hear Res

January 2025

Columbia University Irving Medical Center, Department of Otolaryngology, Head and Neck Surgery, 180 Fort Washington Ave, New York, 10032, NY, USA; Columbia University, Department of Biomedical Engineering, 1210 Amsterdam Ave, New York, 10027, NY, USA.

Sound-evoked displacement responses at the outer hair cell-Deiters' cell junction (OHC-DC) are of significant interest in cochlear mechanics, as OHCs are believed to be in part responsible for active tuning enhancement and amplification. Motion in the cochlea is three-dimensional, and the architecture of the organ of Corti complex (OCC) suggests the presence and mechanical importance of all three components of motion. Optical coherence tomography (OCT) displacement measurements of OHC-DC motion from different experimental preparations often show disparate results, potentially due to OCT measuring only the motion component along the beam axis.

View Article and Find Full Text PDF

In this contribution, we apply our newly developed ball-milling platform, which combines Raman spectroscopy and thermal (IR) imaging, as well as acoustic and high-speed optical video recordings, to the synthesis and transformation of citric acid-isonicotinamide (1:2) cocrystal polymorphs in transparent PMMA jars. Particularly, we demonstrate how Raman, temperature, acoustic, and video data are complementary and enable detection and connection of chemical and physical events happening during ball-milling in a time-resolved manner. Importantly, we show that the formation of the three cocrystal polymorphs can be detected through acoustic analyses solely.

View Article and Find Full Text PDF

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!