Back-and-forth motion induces perceptual shrinkage of the motion path, but such shrinkage is hardly perceived for one-way motion. If the shrinkage is caused by temporal averaging of stimulus position around the endpoints, it should also be induced for one-way motion at higher motion speeds. In psychophysical experiments with a high-speed projector, we tested this conjecture for a one-way motion stimulus at various speeds (4-100 deg/s) along a straight path. Results showed that perceptual shrinkage of the motion path was robustly observed in higher-speed motion (faster than 66.7 deg/s). In addition, the amount of the forwards shift at the onset position was larger than that of the backwards shift at the offset position. These results demonstrate that high-speed motion can induce shrinkage, even for a one-way motion path. This can be explained by the view that perceptual position is represented by the integration of the temporal average of instantaneous position and the motion representation.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4964654 | PMC |
| http://dx.doi.org/10.1038/srep30592 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Efficacy of Scapular Functional and Cervical Isometric Exercises in the Management of Chronic Mechanical Neck Pain: A Randomized Comparative Trial.
Pain Res Manag
December 2024
Department of Rehabilitation Sciences, College of Applied Medical Sciences, King Saud University, Riyadh 11433, Saudi Arabia.
The global rise in work-related musculoskeletal ailments has led to issues like neck discomfort, scapular muscle dysfunction, reduced neck mobility, and functional limitations. This study aimed to evaluate the effectiveness of scapular functional exercises (SFE) and cervical isometric exercises (CIE) on pain, cervical range of motion (CROM), and functional limitations in individuals with chronic mechanical neck pain (CMNP). A two-arm, parallel group pretest-post-test randomized comparative trial was conducted.
View Article and Find Full Text PDFAnalysis of posterior hip joint impingement about developmental dysplasia of the hip after total hip arthroplasty.
Clin Biomech (Bristol)
December 2024
Department of Orthopedic Surgery, Hiroshima University Hospital Graduate School of Biomedical and Health Sciences, Hiroshima City, Hiroshima Prefecture, Japan.
Background: Total hip arthroplasty is the preferred treatment for advanced hip osteoarthritis, yet complications like hip dislocation (0.2 %-10 %) persist due to factors such as implant design, positioning, surgical technique, and patient-specific conditions. Impingement between prosthetic components or the acetabulum and proximal femur is a primary cause of instability.
View Article and Find Full Text PDFReciprocating Torsional Fatigue and Mechanical Tests of Thermal-Treated Nickel Titanium Instruments.
J Endod
December 2024
Department of Endodontics, Fluminense Federal University, Niteroi, Brazil.
Introduction: This study aimed to evaluate the mechanical properties of Reciproc, Reciproc Blue, One RECI, and R-Motion, specifically focusing on their flexibility and buckling resistance and to assess their torsional fatigue behavior under 2 different reciprocation angles (150°/30° or 70°/30°).
Methods: A total of 160 instruments (40 per brand) were tested. Flexion and buckling tests were conducted using a Universal testing machine (DL 200 MF).
Recapitulation of physiologic and pathophysiologic pulsatile CSF flow in purpose-built high-throughput hydrocephalus bioreactors.
Fluids Barriers CNS
December 2024
Department of Chemical Engineering and Materials Science, Wayne State University, 6135 Woodward Avenue, Rm 1413, Detroit, MI, 48202, USA.
Background: Hydrocephalus, an accumulation of cerebrospinal fluid (CSF) in the ventricles of the brain, is often treated via a shunt system to divert the excess CSF to a different compartment; if left untreated, it can lead to serious complications and permanent brain damage. It is estimated that one in every 500 people are born with hydrocephalus. Despite more than 60 years of concerted efforts, shunts still have the highest failure rate of any neurological device requiring follow-up shunt revision surgeries and contributing to the $2 billion cost of hydrocephalus care in the US alone.
View Article and Find Full Text PDFEfficacy of Different Doses of Intra-Articular Tranexamic Acid for Reducing Blood Loss and Lower Limb Swelling After Total Knee Arthroplasty: A Prospective, Randomized, Controlled Trial.
Orthop Surg
December 2024
Department of Orthopaedics Surgery, West China Hospital, Sichuan University, Chengdu, China.
Objective: Both blood loss and lower extremity swelling after total knee arthroplasty (TKA) can affect a patient's postoperative recovery. The aim of this trial was to investigate whether different doses of intra-articular tranexamic acid (TXA) can reduce blood loss and postoperative lower limb swelling.
Methods: In a prospective, randomized-controlled trial, a total of 225 patients were randomly assigned to three groups from September 2020 through January 2021: intra-articular injections of 3 g, 1 g of TXA, or placebo (saline solution).
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!