The dimensions of the summation area are greater at low stimulus contrast.
This rapid transient or phasic response is not observed at low stimulus flow rate (e.g. 7.5 ml/min).
However, very low stimulus frequencies (0.17 to 0.08 Hz) can maintain this enhancement after TSSP and windup have occurred.
All subjects participated in a driving simulation that lasted for one hour and consisted of a short training period, a high stimulus segment and a low stimulus segment with two distinct monotonous periods.
Results: In the second monotonous period within the low stimulus environment, ADHD subjects were significantly more likely than controls to collide with an obstacle suddenly appearing from the periphery, adjusting for age and gender.
IGF-1-treated myocardium exhibits an enhanced PTD-Ca2+ response and a better intracellular Ca2+ replenishing ability at the low stimulus frequencies.
The simulation results exhibit some of the characteristic nonlinear behavior of the basilar membrane commonly observed in experimental measurements, such as significant amplification and sustained "ringing" in the transient response at low stimulus level.
A comparison of simple-spike and vestibular signals contained the information required to guide learning only at low stimulus frequencies, and a comparison of climbing-fiber and simple-spike signals contained the information required to guide learning only at high stimulus frequencies.
Previous studies in anesthetized monkeys found that inactivating feedback from extrastriate visual cortex produced effects in striate cortex that were relatively weak, generally suppressive, largest for visual stimuli confined to the receptive field center, and detectable only at low stimulus contrast.
Probing further, Figueiro's team divided the office workers into those who were receiving a high circadian stimulus – light that was bright or blue enough to activate the circadian system – and those who were receiving a low stimulus.
Morning light seemed to be particularly powerful: those exposed to a high stimulus between 8 00 and 12 00 took an average 18 minutes to fall asleep at night, compared to 45 minutes in the low stimulus group.
