Gregarious forms are attracted by tactile stimuli to established members or to their remains, while commensal and parasitic species, many of which are host-specific, also use chemical stimuli to detect a suitable host.
Additionally, the tests available in routine clinical practice do not provide the appropriate stimuli to detect such defects.
Unlike aerial predators, many aquatic predators use chemical stimuli to detect their prey, imposing a high risk to a chemical signaller in water [ 14, 15].
For the investigation of luminance contrast sensitivity, we used sinusoidal gratings at several spatial frequencies as stimuli to detect the contrast threshold.
It does not appear as a particularly strong assumption that the human brain can do with words what a vast range of nervous systems can do with visual stimuli: to detect in which order they appear.
Although speculative, such differences might result in males requiring greater thermal stimulus intensities to detect pain and consequently exhibit greater brain activation in sensory pain regions.
While older females were more sensitive to pain (i.e., they required lower stimulus temperatures to detect mild and moderate pain intensity), they did not report greater perceived pain unpleasantness.
In the present study, the subject's attention was directed to the tactile stimulus (S-1) to detect the frequency of vibration.
Interventions: Each subject's detection thresholds (ie, minimum level of stimulus to be detected) for a vibrotactile stimulus without and with mechanical noise (ie, random vibration with a small intensity) were determined by using a 4-, 2-, and 1-stepping algorithm.
In studies of conscious change detection using a S1-S2 or "one-shot" flicker paradigm, a diflickere in ERparadigmudes at latencies between of 60-150 ms from stimulus onset relatedifferenceted stinulus changERPin compamplitudesstimuli contatning no change has been observed [ 10, 15, 29- 32].
