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Intermodal selective attention. II. Effects of attentional load on processing of auditory and visual stimuli in central space.
Electroencephalogr Clin Neurophysiol. 1992 May; 82(5):356-68.EC

Abstract

The effect of processing load on event-related brain potentials (ERPs) was investigated in an intermodal selective attention task in which subjects attended selectively to auditory or visual stimuli. Processing load was manipulated by requiring subjects to detect either difficult-to-detect (deviant) or easy-to-detect (DEVIANT) targets in separate blocks of trials. Attention to auditory stimuli was associated with negative (Nda, 90-170 msec) and positive (Pda, 190-270 msec) enhancements in the ERPs to auditory stimuli. The Nda increased in amplitude with increasing processing load. Deviant auditory stimuli occurring among auditory standard stimuli elicited frontally distributed mismatch negativities (MMNs). The MMN persisted during visual attention and was unaffected by visual processing load. However, the MMN to deviants but not DEVIANTS was enhanced in amplitude with auditory attention. Attention to visual stimuli resulted in positive (Pdv, latency 70-130 msec) and negative (Ndv, 170-270 msec) modulations of visual ERPs, that increased with increasing processing load. Prominent visual deviance-related negativities were observed at occipital and infero-temporal scalp sites (latencies 90-290 msec), but only to DEVIANT visual stimuli. The early MMN-like portion of the visual deviance-related negativity was independent of attention, with equal amplitudes during different auditory and visual conditions.

Authors+Show Affiliations

Department of Neurology, UC Davis, VA Medical Center, Martinez 94553.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

1374704

Citation

Alho, K, et al. "Intermodal Selective Attention. II. Effects of Attentional Load On Processing of Auditory and Visual Stimuli in Central Space." Electroencephalography and Clinical Neurophysiology, vol. 82, no. 5, 1992, pp. 356-68.
Alho K, Woods DL, Algazi A, et al. Intermodal selective attention. II. Effects of attentional load on processing of auditory and visual stimuli in central space. Electroencephalogr Clin Neurophysiol. 1992;82(5):356-68.
Alho, K., Woods, D. L., Algazi, A., & Näätänen, R. (1992). Intermodal selective attention. II. Effects of attentional load on processing of auditory and visual stimuli in central space. Electroencephalography and Clinical Neurophysiology, 82(5), 356-68.
Alho K, et al. Intermodal Selective Attention. II. Effects of Attentional Load On Processing of Auditory and Visual Stimuli in Central Space. Electroencephalogr Clin Neurophysiol. 1992;82(5):356-68. PubMed PMID: 1374704.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Intermodal selective attention. II. Effects of attentional load on processing of auditory and visual stimuli in central space. AU - Alho,K, AU - Woods,D L, AU - Algazi,A, AU - Näätänen,R, PY - 1992/5/1/pubmed PY - 1992/5/1/medline PY - 1992/5/1/entrez SP - 356 EP - 68 JF - Electroencephalography and clinical neurophysiology JO - Electroencephalogr Clin Neurophysiol VL - 82 IS - 5 N2 - The effect of processing load on event-related brain potentials (ERPs) was investigated in an intermodal selective attention task in which subjects attended selectively to auditory or visual stimuli. Processing load was manipulated by requiring subjects to detect either difficult-to-detect (deviant) or easy-to-detect (DEVIANT) targets in separate blocks of trials. Attention to auditory stimuli was associated with negative (Nda, 90-170 msec) and positive (Pda, 190-270 msec) enhancements in the ERPs to auditory stimuli. The Nda increased in amplitude with increasing processing load. Deviant auditory stimuli occurring among auditory standard stimuli elicited frontally distributed mismatch negativities (MMNs). The MMN persisted during visual attention and was unaffected by visual processing load. However, the MMN to deviants but not DEVIANTS was enhanced in amplitude with auditory attention. Attention to visual stimuli resulted in positive (Pdv, latency 70-130 msec) and negative (Ndv, 170-270 msec) modulations of visual ERPs, that increased with increasing processing load. Prominent visual deviance-related negativities were observed at occipital and infero-temporal scalp sites (latencies 90-290 msec), but only to DEVIANT visual stimuli. The early MMN-like portion of the visual deviance-related negativity was independent of attention, with equal amplitudes during different auditory and visual conditions. SN - 0013-4694 UR - https://www.unboundmedicine.com/medline/citation/1374704/Intermodal_selective_attention__II__Effects_of_attentional_load_on_processing_of_auditory_and_visual_stimuli_in_central_space_ L2 - https://linkinghub.elsevier.com/retrieve/pii/0013-4694(92)90005-3 DB - PRIME DP - Unbound Medicine ER -