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The Beat Goes OnLee Bartel, PhD
University of Toronto
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The Beat Goes On: Drums keep driving rhythm to the brain
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What is this session about?
the brain as a dynamic electro-wave device
the potential of sound and music to drive brainwaves
Bad things happen when brainwaves are dysregulated
Potentially music/sound therapy can re-regulate the brain
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Margaret’s Story
Sleep
Chronic pain
What was going on in her brain?
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Concepts of brain
Computer mother board – hard wired, physical, primary concern is about structure – physiology
We know quite a bit about this but it hasn’t explained much about cognition or consciousness
Neurochemical swamp – it’s all about hormones and neurotransmitters – chemistry
We know quite a bit about this but is doesn’t explain much either
The electrical system – brainwaves, nerve pulses --electrical
We know little about this – and it holds the most potential
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Oscillatory Model of the Brain
Electrical activity uses the physiological structures and is modified by chemical
Brain states – steady state neural activity
There is constant pulsation (firing) at the whole range of frequencies (spontaneous)
Our states of being are somewhat related to electrical power in specific ranges of frequency
Delta – sleep; Alpha – awake relaxed; Beta – problem solving; High Beta – stress; Gamma??
Consciousness - ??
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Amol’s story
Parkinson’s – frozen movement
30 Hz on chair for 5 minutes
What was going on in his brain?
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Oscillatory Model
Really about Intra-brain communication – how the various parts interact and communicate
Rhythmic oscillatory coherence – multiple neurons must synchronize their “firing” for communication to take place
Circuits and Loops – e.g., motor circuit – cerebellum & basal ganglia; thalamocortical loop.
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Rhythm Driving Brain Response
Sound creates a “firing” of the auditory nerve – into the thalamus – to the cortex.
So rhythmic repetitive sound creates brainwave synchrony – oscillatory coherence
So when you listen to steady drumming – like shaman drumming – there is a brain response at the frequency of the drumming.
But it doesn’t have to be drumming – can be other regular sound – like a Bach keyboard piece
This effect can also be at higher frequencies – e.g., 40Hz
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Heidi’s story
Memory started to deteriorate
Moved into nursing home
Had not conversed with her husband for 2 years
Thought she was in a train station
Nextwave chair – 40 Hz, 5 minutes, 15 minutes
What was happening in her brain?
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Back to Brain Wave activity and Circuits
When “normal” rhythmic pulsation in specific circuits gets dysregulated, problems arise.
Motor circuit dysregulation – Parkinson’s
Memory circuit dysregulation – Alzheimer’s
Mood circuit dysregulation – Major Depression
Sensory circuit dysregulation – Chronic Pain
Thalamocortical loop dysregulation: tinnitus, psychiatric, etc
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Can sound re-regulate the brain dysrhythmias?
Margaret - Sleep – delta state dysrhythmia –
Amol – Motor – Parkinson’s – 5 minutes of 30Hz
Heidi – memory – 15 minutes of 40Hz
Linda – fibromyalgia – 23 minutes of 40Hz – TCD
Depression – Fibromyalgia study
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How else can drums driving rhythm to the brain be used?
Cardio workout study
Cardio diagnosis
Likely to drop out
3 groups – (1) as usual; (2) music to walk by (3) punched up music
Effect strongest with punched up music – driving motor response
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Questions?