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How the Brain Learns to Read
Joan Hargrave, CCC-SLP & Nina Kraus, PhD Auditory Neuroscience Laboratory www.brainvolts.northwestern.edu [email protected]
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The Auditory Neuroscience Lab studies how the brain’s ability to
change can be harnessed to improve human communication.
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Road Map
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• Our brain measure • Reading and the brain • Intervention/classroom
applications
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Auditory brain response to complex sounds
COMPLEX SOUNDS
Speech
AUDITORY BRAIN
RESPONSE Electrical activity
in the brain
stimulus
response
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Access biology how?
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Complex Auditory Brain Response
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Objective
Vetted
Mobile
Fast
Repeatable
Uniform
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Detail Speech Sound
Auditory Brain Response
fMRI Response
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Reading
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Sound to meaning
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“Sound it out …”
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Auditory brain response tells us something about LITERACY
/dɑ/
consonant vowel
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School-age Readers
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1) Stability
Hornickel & Kraus (2013) JNeuro
“da”
Brain response
Unstable Stable
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Hornickel & Kraus (2013) J Neuro; Banai et al. (2009) Cereb Cortex; Wible et al. (2005) Brain, Wible et al. (2004) Biol Psych, King et al. (2002) Neurosci Lett, Cunningham et al. (2002) Clin Neurophysiol;
2) Timing “da”
Brain response
Good Reader Poor Reader
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Hornickel & Kraus (2013) J Neuro; Banai et al. (2009) Cereb Cortex; Wible et al. (2005) Brain, Wible et al. (2004) Biol Psych, King et al. (2002) Neurosci Lett, Cunningham et al. (2002) Clin Neurophysiol;
3) Harmonics
Good Readers Poor Readers
“da”
Brain response
Mor
e ro
bust
bra
in re
spon
se
Frequency (Hz)
Harmonics
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70% correct identification
Typically-Developing Reading Impaired
In School-Age Readers:
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Preschool Literacy Study
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White-Schwoch et al. (2015) PLoS Biol
Timing Stability
Harmonics Phonological Awareness
Rapid Naming
Age 3 Age 4
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http://www.npr.org/ www.brainvolts.northwestern.edu/inthenews.php
The test that can look into a child’s reading future
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Intervention: Dyslexia
→
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Response to Intervention
Hornickel et al. (2012) PNAS
Hyde Park Day Schools
FM listening device in the classroom
Pre-test Post-test
1 year
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Hornickel et al. (2012) PNAS; see reading slideshow to learn more
Pre-training Post-training
Bra
in F
unct
ion
and
R
eadi
ng A
bilit
ies
typical Enhanced
Diminished
dyslexic
Brain Function
Reading Abilities
4 Reading improvements
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Clinical Multi-disciplinary Evaluations
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Recruitment
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www.brainvolts.northwestern.edu
Supported by: NIH – NICHD NIH- NIDCD
NSF NAMM
Knowles Hearing Center Grammy Foundation Mathers Foundation