Second, to control eye vergence and fixation during fMRI, subjects performed left/right Vernier discriminations with small infrequent targets flashed briefly with 25% probability.
Relatively infrequent stimuli, like flashes or tones, tend to increase the speed of the brain's internal pacemaker.
When the chordamesodermal cells attached to the silicone wall surface, clear calcium flashes were infrequent.
The area of the Theban hills is subject to infrequent violent thunder storms, causing flash floods in the valley.
Systemic side effects, such as hot flashes and headache, were infrequent.
Burns are also relatively infrequent among survivors of bombings and tend to be mild flash burns with low mortality [ 4].
Rain is infrequent, but when it occurs, it can be pounding, even resulting in flash floods.
Occasional flashes of vigour and intelligence by some of Xerxes' successors were too infrequent to prevent eventual collapse but did allow the empire to die gradually.
However, Shalimov and Bösinger (2008) proposed that relatively infrequent (∼10%), but more intense (about an order of magnitude) positive cloud-to-ground flashes CG+ can provide a necessary ULF background at large distances.
