Broughton (1975) hypothesized that the 90 minute Basic Rest Activity Cycle (BRAC) is associated with an alternation in the relative efficiency of the cerebral hemispheres. Investigations testing daytime ultradian rhythms in cognitive performance with non-lateralized verbal and spatial tasks (Klein and Armitage, 1979; Kripke, Fleck, Mullaney dz Levy, 1983 ; Armitage, Moffitt, Hoffman & Pigeau, 1985) yielded contrasting results. In order to have a more direct evaluation of hemispheric functioning, the present study assessed performance in a letters recognition (LR) and in points enumeration (PE) task, in which stimuli were laterally presented to the left and to the right visual hemifields (LVHF and RHVF) (Bertini, Violani, Zoccolotti, Altomare, Doricchi & Evangelisti, 1985). Furthermore morning V.S. afternoon statiomniety, stability of ultradian variations in two different days and modulating effects by individual characteristics were assessed.
Ultradian variations in a lateralized letters recognition and points enumeration task: non-stationariety, stability and individual differences / De Gennaro, L., Lucidi, F., Monti, A.M., Violani, C.. - In: INTERNATIONAL JOURNAL OF PSYCHOPHYSIOLOGY. - ISSN 0167-8760. - 7:2-4(1989), pp. 176-177. [10.1016/0167-8760(89)90123-2]
Ultradian variations in a lateralized letters recognition and points enumeration task: non-stationariety, stability and individual differences
De Gennaro, L.;
1989
Abstract
Broughton (1975) hypothesized that the 90 minute Basic Rest Activity Cycle (BRAC) is associated with an alternation in the relative efficiency of the cerebral hemispheres. Investigations testing daytime ultradian rhythms in cognitive performance with non-lateralized verbal and spatial tasks (Klein and Armitage, 1979; Kripke, Fleck, Mullaney dz Levy, 1983 ; Armitage, Moffitt, Hoffman & Pigeau, 1985) yielded contrasting results. In order to have a more direct evaluation of hemispheric functioning, the present study assessed performance in a letters recognition (LR) and in points enumeration (PE) task, in which stimuli were laterally presented to the left and to the right visual hemifields (LVHF and RHVF) (Bertini, Violani, Zoccolotti, Altomare, Doricchi & Evangelisti, 1985). Furthermore morning V.S. afternoon statiomniety, stability of ultradian variations in two different days and modulating effects by individual characteristics were assessed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
