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From perception to action: phase-locked gamma oscillations correlate with reaction times in a speeded response task

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Check out this Knowledge Base article from StressTherapy Solutions: From perception to action: phase-locked gamma oscillations correlate with reaction times in a speeded response task.

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Study at a glance

Area
QEEG, Methods & Mechanisms
Study type
Observational study
Authors
Fründ I, Busch NA, Schadow J, Körner U, Herrmann CS
Journal
BMC Neuroscience
Year
2007
Participants
13 healthy participants
Protocol
EEG during a speeded visual reaction task

Key findings

  • Fast trials showed a slow negative potential over central sites beginning about 800 ms before the response
  • Fast trials showed highly phase-locked gamma over central and posterior sites 90 to 140 ms after the stimulus
  • Slow trials lacked the slow negative potential and had significantly reduced gamma
  • Gamma oscillations were significantly delayed in slow trials compared with fast ones

DOI 10.1186/1471-2202-8-27 → PubMed 17439642 →

This EEG study examined whether fast, phase-locked gamma oscillations, usually tied to perception, also relate to how quickly people respond. Thirteen healthy participants pressed a button as fast as possible whenever the same visual stimulus appeared, and fast and slow trials were compared. Fast responses were preceded by a slow negative potential and accompanied by strong early gamma activity. The authors conclude that phase-locked gamma supports very rapid, though not necessarily detailed, integration of sensing and acting.