Search results for "Slow potential"
showing 2 items of 2 documents
Anxiety and Covert Changes of Attention Control
1986
Publisher Summary This chapter presents a research paradigm, which allows the study of covert attentional processes in threatening situations and explores their relationship to the subjective experience of anxiety. These processes mediate changes of attention control beyond awareness by influencing the selective organization of behavior. The contingent negative variation (CNV) is a surface-negative slow potential that arises in the interstimulus interval of a forewarned reaction time task, where a warning signal (S1) precedes an imperative stimulus (S2), to which an overt motor response is required. If the interstimulus interval is shorter than approximately 3 seconds, CNV appears as a cont…
Aiming routines and their electrocortical concomitants among competitive rifle shooters
2000
The present study focused on an examination of competitive shooters' aiming process during a rifle shooting task. The barrel movements of the rifle, as detected by a laser system during the last 1000-ms time period preceding the triggering, were recorded from six elite and six pre-elite shooters. Electrocortical slow potentials (SPs) from frontal (Fz), centro-lateral (C3, C4), and occipital (Oz) brain areas were recorded to get an additional insight into the underlying covert processing. The results suggested that the elite shooters did not pull the trigger until they reached a sustained rifle position. In the pre-elite shooters the rifle appeared to be in a less stable position, and their …