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Delayed auditory feedback: a study into vocal motor patterns UCL Institute of Cognitive Neuroscience Dr Zarinah Agnew Dr Carolyn McGettigan Briony Banks.

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Presentation on theme: "Delayed auditory feedback: a study into vocal motor patterns UCL Institute of Cognitive Neuroscience Dr Zarinah Agnew Dr Carolyn McGettigan Briony Banks."— Presentation transcript:

1 Delayed auditory feedback: a study into vocal motor patterns UCL Institute of Cognitive Neuroscience Dr Zarinah Agnew Dr Carolyn McGettigan Briony Banks Professor Sophie Scott

2 Background: Temporal asynchrony between speech production and its feedback to the auditory system causes: disruption of uent speech (Lee, 1950; Yates, 1963) slower speech rates, stuttering, intonation changes, and phoneme exchanges (Chapin et al., 1981). maximal disruptions at 200ms delay (Stuart et al., 2002).

3 Experimental Setup 4 sec stimuli 3 sec scan 2 sec ISI Want to capture this 1 to 2 seconds 30 events, 7 conditions, 10sec TR: 35 minutes sec 1) Read aloud: minimal DAF feedback (50ms) 3) Read pseudo words: minimal DAF feedback (50ms) 2) Read aloud: maximal DAF feedback (200ms) 4) Read pseudo words : maximal DAF feedback (200ms) 8 conditions: 6) Passive listening 7) Rest 5) Mouthing read sentences See written sentences in all conditions apart from rest

4 Research Questions What neural structures are involved in adaptation to DAF? How does motor familiarity influence the DAF effect? - Compare early and late blocks - Compare normal and pseudo words/ sentences Activity in which regions predicts individual ability to speak under DAF? - Use behavioural performance scores (pre or post scan?) Suppression in auditory cortex? Efference copy for speech? - Reading aloud Vs listening and mouthing Cerebellum


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