Recognition of optic stimuli (contour drawings, words and word combinations) was studied in conditions of binocular, monocular and dichoptic presentation. The interval between stimuli of the dichoptic complex (ISI) was: 0, 10, 20, 50, 100, 200, 400, 600, and 1000 ms. In all the cases "the effect of the right eye" was revealed. The mean values of the asymmetry index (A) are: high probabilistic monocular dichoptic presentation--45%. With a longer ISI, the percentage of correct recognitions of the second stimulus presented to the left eye, increases, while the A parameter decreases. This dependence is less pronounced in the recognition of the first terms of the stimuli pair. Dependence between the recognition level of the first and second stimuli, presented to the right eye and the ISI, is monotonous. The following A values for the three kinds of stimuli have been obtained: drawings--37%, word combinations--38% and words 59%. The results are discussed in the aspects of functional asymmetry, psychologic refractoriness and attention.
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Somatosens Mot Res
January 2025
Neuromuscular Research Lab, Faculdade de Motricidade Humana, Universidade de Lisboa, Estrada da Costa, Dafundo, Portugal.
Purpose: The H reflex recruitment curve represents the gold standard for quantifying changes in spinal circuitries. However, there is no agreement on how many stimulations should be applied for each parameter. Thus, we explored the impact of varying the number of stimulations (3, 6, 9, 12 and 15 stimuli per intensity) on between-day reliability of soleus H reflex.
View Article and Find Full Text PDFSocial vocalizations contain cues that reflect the motivational state of a vocalizing animal. Once perceived, these cues may in turn affect the internal state and behavioral responses of listening animals. Using the CBA/CAJ mouse model of acoustic communication, this study examined acoustic cues that signal intensity in male-female interactions, then compared behavioral responses to intense mating vocal sequences with those from another intense behavioral context, restraint.
View Article and Find Full Text PDFBiomedicines
January 2025
Institute of Biophysics, HUN-REN Biological Research Centre, H-6701 Szeged, Hungary.
For the rapid, objective characterization of the physiological stress response, there is currently no generally recognized standard. The stress measurement methods used in practice (e.g.
View Article and Find Full Text PDFDiagnostics (Basel)
January 2025
Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, 117465 Moscow, Russia.
The link between serotonergic modulation and depression is under debate; however, serotonin reuptake inhibitors (SRIs) are still the first-choice medicine in this condition. Disturbances in time perception are also reported in depression with one of the behavioral schedules used to study interval timing, differential-reinforcement-learning-of-low-rate, having been shown to have high predictive validity for an antidepressant effect. Here, we introduce an IntelliCage research protocol of an interval bisection task that allows more ecologically valid and less time-consuming rodent examination and provides an example of its use to confirm the previously reported acute effect of an SRI, clomipramine, on interval timing (increase in bisection point, D50).
View Article and Find Full Text PDFBr J Anaesth
January 2025
Department of Anaesthesiology, Peking University First Hospital, Beijing, China; Outcomes Research Consortium, Cleveland, OH, USA.
Background: The Qnox index is a novel monitor to quantify intraoperative nociception based on an electroencephalographic algorithm. We evaluated the ability of the Qnox index to discriminate noxious from non-noxious stimuli, respond to stimuli, and discriminate different levels of analgesia in patients under propofol anaesthesia with neuromuscular block.
Methods: Qnox was compared with heart rate and mean arterial pressure with five designated stimuli: tetanic stimulations without (tetanic 1) and with sufentanil (tetanic 2), skin incision, tracheal intubation, and a non-noxious period.
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