PMID- 1714809
OWN - NLM
STAT- MEDLINE
DCOM- 19910926
LR  - 20190721
IS  - 0013-4694 (Print)
IS  - 0013-4694 (Linking)
VI  - 79
IP  - 3
DP  - 1991 Sep
TI  - Modulation of early auditory processing during selective listening to rapidly 
      presented tones.
PG  - 170-91
AB  - Two dichotic listening experiments were performed in which stimulus and task 
      conditions were optimized for the early selection of inputs. Subjects listened 
      selectively to sequences of rapidly presented tone pips in one ear while ignoring 
      tone pips of a different pitch in the opposite ear. In both experiments, an 
      enhanced positivity between 20 and 50 msec (the 'P20-50') was observed over 
      central and frontal sites in the ERPs to the attended-channel tone pips. At 
      longer latencies, the effects of attention appeared to include an amplitude 
      modulation of several exogenous ERPs, including subcomponents of the central N1 
      (60-150 msec) and P2 (170-230 msec) waves and the temporal T complex (80-150 
      msec). In contrast, the attention effect prefrontally consisted of a broad 
      negativity that appeared to be largely endogenous. A signal processing technique 
      (Adjar) was employed to correct for distortion of mutually overlapping ERPs 
      elicited by successive stimuli presented at short interstimulus intervals (ISIs). 
      It was confirmed that the P20-50 attention effect was not the result of 
      differential overlap from previous ERPs. In addition, this technique allowed an 
      analysis to be made of the effects of the preceding stimulus type and ISI on the 
      attention-sensitive ERPs, which provided further support for the view that highly 
      focused selective attention can directly modulate exogenous components of the 
      auditory ERP. Moreover, these sequence-dependent ERP modulations were paralleled 
      by variations in target discrimination performance. Taken together, these results 
      provide strong support for the early selection hypothesis that attention can 
      serve to selectively bias or gate stimulus processing before full perceptual 
      analysis has occurred.
FAU - Woldorff, M G
AU  - Woldorff MG
AD  - Department of Neurosciences, University of California, San Diego, La Jolla 
      92093-0608.
FAU - Hillyard, S A
AU  - Hillyard SA
LA  - eng
GR  - MH 25594/MH/NIMH NIH HHS/United States
PT  - Journal Article
PT  - Research Support, U.S. Gov't, Non-P.H.S.
PT  - Research Support, U.S. Gov't, P.H.S.
PL  - Ireland
TA  - Electroencephalogr Clin Neurophysiol
JT  - Electroencephalography and clinical neurophysiology
JID - 0375035
SB  - IM
MH  - Acoustic Stimulation
MH  - Adolescent
MH  - Adult
MH  - Attention/physiology
MH  - Brain/physiology
MH  - Dichotic Listening Tests
MH  - Electroencephalography
MH  - Evoked Potentials, Auditory/*physiology
MH  - Female
MH  - Functional Laterality
MH  - Hearing/*physiology
MH  - Humans
MH  - Reaction Time
MH  - Reference Values
MH  - Task Performance and Analysis
MH  - Temporal Lobe/physiology
EDAT- 1991/09/01 00:00
MHDA- 1991/09/01 00:01
CRDT- 1991/09/01 00:00
PHST- 1991/09/01 00:00 [pubmed]
PHST- 1991/09/01 00:01 [medline]
PHST- 1991/09/01 00:00 [entrez]
AID - 0013-4694(91)90136-R [pii]
AID - 10.1016/0013-4694(91)90136-r [doi]
PST - ppublish
SO  - Electroencephalogr Clin Neurophysiol. 1991 Sep;79(3):170-91. doi: 
      10.1016/0013-4694(91)90136-r.