Different methods for estimating reaction times (RTs) from either finger flexion or finger extension responses have been evaluated. The onset of finger movement was recorded with a photoelectric method and the results are compared with RT measures based on microswitch closure or onset of electromyographic (EMG) activity in the prime move muscle. EMG analysis showed the voluntary motor commands to present a characteristic ballistic pattern in RTs. However, this was not true for a number of trials with unusually long RTs which involved ramp or double burst EMG patterns that were interpreted as reflecting errors in the force calibration of motor commands. RTs based on photoelectric recording of onset of finger extension were consistently related to the RTs estimated from EMG onset in the prime mover muscle. It is concluded that the EMG onset or the finger lift photoelectric method is best suited for reliable RT recording.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/0168-5597(91)90013-n | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Activity of a descending neuron associated with visually elicited flight saccades in Drosophila.
Curr Biol
January 2025
Research Group Neurobiology of Flight Control, Max Planck Institute for Neurobiology of Behavior - caesar, 53175 Bonn, Germany. Electronic address:
Approaching threats are perceived through visual looming, a rapid expansion of an image on the retina. Visual looming triggers defensive responses such as freezing, flight, turning, or take-off in a wide variety of organisms, from mice to fish to insects. In response to looming, flies perform rapid evasive turns known as saccades.
View Article and Find Full Text PDFComputational study on water based hybrid photovoltaic systems with different absorber configurations.
Sci Rep
January 2025
Department of Mechanical Engineering, India KLS Vishwanathrao Deshpande Institute of Technology, Haliyal, India.
The current study assesses several water-based PVT system thermal absorber configurations. The thermal absorber in PVT system plays a vital role in efficiency evaluation as it lowers PV temperature and collects heat energy. The current study aims to discover and analyze advanced thermal absorber design by comparing well-received spiral circular absorbers and non-cooled PV with proposed semi-circular thermal absorbers with varying flow configurations.
View Article and Find Full Text PDFCharacteristic Analysis and Error Compensation Method of Space Vector Pulse Width Modulation-Based Driver for Permanent Magnet Synchronous Motors.
Sensors (Basel)
December 2024
School of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, China.
Permanent magnet synchronous motors (PMSMs) are widely used in a variety of fields such as aviation, aerospace, marine, and industry due to their high angular position accuracy, energy conversion efficiency, and fast response. However, driving errors caused by the non-ideal characteristics of the driver negatively affect motor control accuracy. Compensating for the errors arising from the non-ideal characteristics of the driver demonstrates substantial practical value in enhancing control accuracy, improving dynamic performance, minimizing vibration and noise, optimizing energy efficiency, and bolstering system robustness.
View Article and Find Full Text PDFRole and modulation of various spinal pathways for human upper limb control in different gravity conditions.
PLoS Comput Biol
January 2025
Biorobotics Laboratory, EPFL, Lausanne, Switzerland.
Humans can perform movements in various physical environments and positions (corresponding to different experienced gravity), requiring the interaction of the musculoskeletal system, the neural system and the external environment. The neural system is itself comprised of several interactive components, from the brain mainly conducting motor planning, to the spinal cord (SC) implementing its own motor control centres through sensory reflexes. Nevertheless, it remains unclear whether similar movements in various environmental dynamics necessitate adapting modulation at the brain level, correcting modulation at the spinal level, or both.
View Article and Find Full Text PDFCorticomuscular coherence existed at the single motor unit level.
Neuroimage
January 2025
School of Rehabilitation Sciences and Engineering, University of Health and Rehabilitation Sciences, Qingdao, Shandong, China. Electronic address:
The monosynaptic cortico-motoneuronal connections suggest the possibility of individual motor units (MUs) receiving independent commands from motor cortex. However, previous studies that used corticomuscular coherence (CMC) between electroencephalogram (EEG) signals and electromyogram (EMG) signals have not directly explored the corticospinal functionality at the single motoneuron level. The objective of this study is to find out whether synchronous activities exist between the motor cortex and individual MUs.
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!