Visual evoked potentials to motion-onset stimulation (M-VEPs) gradually attenuate in amplitude during examination. The observed decline in averaged responses can be caused by decreases in single response magnitudes and/or increased variability in a response delays, that is, latency jittering. To illuminate the origins of the suppression of M-VEPs during stimuli repetition, we used correlation technique to estimate an upper bound of possible latency jittering of single sweeps and we evaluated the effect of its correction on the amplitudes of three M-VEP dominant peaks P1, N2 and P3. During prolonged visual motion stimulation, the variability of corrective latency shifts in the occipital region increased (r = 0.35: 0.44) and the number of single responses corresponding to the average curve declined in occipital and parietal derivations (r = -0.48: -0.62). While the P1 peak amplitude did not exhibit any time-specific behaviour, the N2 amplitude exhibited a significant decay of 29.4% that was partially reduced to 16.6% in the central occipital derivation by the latency jitter and non-correspondence corrections. The strongest attenuation (32.7%) was observed in the P3 amplitude and was less sensitive to the corrections, dropping only to 27.9%. The main part of the response suppression to repeated motion stimulation was caused by amplitude drop and represents non-stationary process that likely correspond to a fatigue model. The rise of variability in latency jitter correction and the reduction in single responses correlated with the M-VEP were significant factors associated with prolonged motion stimulation. The relation of these parameters to a hypothetical veridical response is ambiguous and can be caused by a time shift of the response or by a change of signal-to-noise ratio. Using selective averaging and latency jitter correction, the effect of response suppression was partially removed.
- MeSH
- Adaptation, Ocular physiology MeSH
- Adult MeSH
- Middle Aged MeSH
- Humans MeSH
- Young Adult MeSH
- Pattern Recognition, Visual physiology MeSH
- Motion Perception physiology MeSH
- Evoked Potentials, Visual physiology MeSH
- Visual Cortex physiology MeSH
- Check Tag
- Adult MeSH
- Middle Aged MeSH
- Humans MeSH
- Young Adult MeSH
- Male MeSH
- Female MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
... Temperature and heat 49 -- 3.1.3 Equations of state and basic processes in gases 51 -- 3.1.4 The laws ... ... state 77 -- 3.4.2 Examples of non-equilibrium thermodynamic processes 79 -- 3.4.2.1 Diffusion 79 -- ... ... Energetic processes in living systems 83 -- 3.5.1 Sources and conversions of energy in living systems ... ... Hrazdíra) 188 -- 10.1 Biosignals and their classification 188 -- 10.2 Biosignal processing 189 -- 11 ... ... Hrazdira) 198 -- 11.3.1 Electrodes 198 -- 11.3.2 Processing of electrical signals 199 -- 11.3.3 Detecting ...
2nd rev. ed. 325 s. : il., tab. ; 30 cm
- Conspectus
- Biochemie. Molekulární biologie. Biofyzika
- NML Fields
- fyzika, biofyzika
- NML Publication type
- učebnice vysokých škol
... Temperature and heat. 41 -- 3.1.3 Equations of state and basic processes in gases 43 -- 3.1.4 The laws ... ... state 69 -- IH3.4.2 Examples of non-equilibrium thermodynamic processes 71 -- 3.4.2.1 Diffusion 71 ... ... Hrazdíra) 180 -- 10.1 Biosignals and their classification 180 -- 10.2 Biosignal processing 181 -- 11 ... ... Hrazdira) 190 -- 11.3.1 Electrodes 190 -- 11.3.2 Processing of electrical signals 191 -- 11.3.3 Detecting ... ... Hrazdira) 225 -- 12.1.1 Algorithm of the imaging process 225 -- 12.1.2 Assessment of image quality 225 ...
1. vyd. viii, 317 s. : il. ; 30 cm
- Conspectus
- Biochemie. Molekulární biologie. Biofyzika
- Učební osnovy. Vyučovací předměty. Učebnice
- NML Fields
- fyzika, biofyzika
- technika lékařská, zdravotnický materiál a protetika
- NML Publication type
- učebnice vysokých škol
... Cortex 9 -- Affective Traits and Aspects of Personality Are Also Anatomically Localized 14 -- Mental Processes ... ... Are Represented in the Brain by Their Elementary Processing Operations 15 -- Selected Readings 17 -- ... ... Units of the Nervous System 21 -- Nerve Cells Form Specific Signaling Networks That Mediate Specific ... ... Behaviors 25 -- Signaling Is Organized in the Same Way in All Nerve Cells 27 -- The Input Component ... ... Wurtz -- Visual Perception Is a Creative Process 492 -- Visual Information is Processed in Multiple Cortical ...
4th ed. xxxiii, 1414 s. : il., tab., grafy ; 30 cm
- MeSH
- Behavior MeSH
- Molecular Biology MeSH
- Nervous System Diseases MeSH
- Nervous System MeSH
- Neurochemistry MeSH
- Neurophysiology MeSH
- Neurons MeSH
- Neurosciences MeSH
- Publication type
- Monograph MeSH
- Conspectus
- Fyziologie člověka a srovnávací fyziologie
- NML Fields
- neurovědy
- biologie
