Building better models in cognitive neuroscience. Part 2: Application
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Transcript of Building better models in cognitive neuroscience. Part 2: Application
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Dr. Brian J. Spiering
Building Better Models in Cognitive Neuroscience:APPLICATION
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Review
• Better models help solve better problems
• Why?
• Ideals
• Modeling
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HOW DOES PROCEDURAL
EXPERTISEDEVELOP?
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1)Idea2)Inception3)Instantiations
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Previous Notions
“It has been widely held that although memory traces are at first formed in the cerebral cortex, they are finally reduced or transferred by long practice to subcortical levels” (p. 466)
Karl Lashley (1950) In search of the engram
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Previous Notions
“Routine, automatic, or overlearned behavioral sequences, however complex, do not engage the PFC and may be entirely organized in subcortical structures” (p. 323)
Joaquin Fuster (2001) The prefrontal cortex – an update
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Previous Notions
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An Contrarian Model of Procedural Expertise
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Procedural learning is striatum dependent.
Procedural expertise is striatum independent.
SPEED Model(Subcortical Pathways Enable Expertise Development)
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INCEPTION
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F. Greg Ashby John Ennis
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SCHEMATICOVERVIEW
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SensoryAssociation
Cortex
Response
BA
B
A-B difference
A B
A BA
Premotor Area(Cortex)
Thalamus
Globus PallidusStriatum
SPEED Model
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SensoryAssociation
CortexA Response
A
A
AA
Premotor Area(Cortex)
Thalamus
Globus PallidusStriatum
ExcitatoryInhibitory
SPEED Model:Single Subcortical
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SensoryAssociation
Cortex
Response
BA
B
A-B difference
A B
A BA
Premotor Area(Cortex)
Thalamus
Globus PallidusStriatum
SPEED Model:Subcortical
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SensoryAssociation
Cortex
StriatumSNpc
Dopamine
Excitatory
SPEED Model:Subcortical Learning
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SensoryAssociation
Cortex
Response
BA
B
A-B difference
A B
A BA
Premotor Area(Cortex)
Thalamus
Globus PallidusStriatum
SPEED Model:Subcortical
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SensoryAssociation
Cortex
Response
BA
A-B difference
SPEED Model:Cortical
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SensoryAssociation
Cortex
Response
BA
B
A-B difference
A B
A BA
Premotor Area(Cortex)
Thalamus
Globus PallidusStriatum
SPEED Model:Cortical Learning
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ACTIVATION EQUATIONS
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SensoryAssociation
Cortex
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BA Striatum
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A BGlobus Pallidus
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A BThalamus
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BA Premotor Area(Cortex)
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Response
A-B difference
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SensoryAssociation
Cortex
Response
BA
B
A-B difference
A B
A BA
Premotor Area(Cortex)
Thalamus
Globus PallidusStriatum
SPEED Model
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LEARNING
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SensoryAssociation
Cortex
A
A
A A
Premotor Area(Cortex)
Thalamus
Globus PallidusStriatum
SPEED Model:1st Trial
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SensoryAssociation
Cortex
A
A
A A
Premotor Area(Cortex)
Thalamus
Globus PallidusStriatum
SPEED Model:Early Learning
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SensoryAssociation
Cortex
A
A
A A
Premotor Area(Cortex)
Thalamus
Globus PallidusStriatum
SPEED Model:Middle Learning
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SensoryAssociation
Cortex
A
A
A A
Premotor Area(Cortex)
Thalamus
Globus PallidusStriatum
SPEED Model:Mature Performance
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LEARNINGEQUATIONS
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SensoryAssociation
Cortex
BA Premotor Area(Cortex)
2-Factor Learning
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SensoryAssociation
Cortex
BA
Striatum
SensoryAssociation
Cortex
SNpc
3-Factor Learning
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Dopamine Release
Incorrect Trial
Correct Trial
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Break
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INSTANTIATIONS
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Romo, Merchant et al.
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0
0.5
1
12 14 16 18 20 22 24 26 28 30
Cycles Per Second
Pro
port
ion
of L
ow R
espo
nses
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0
0.5
1
12 14 16 18 20 22 24 26 28 30
Cycles per Second
Pro
po
rtio
n o
f L
ow
Res
po
nse
s
Low High
Monkeys SPEED
Speed (mm/s)
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Merchant et al. (1997)
SPEED
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Romo et al., 1997
SPEED
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Carelli, Wolske, & West (1997)
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SPEED
Carelli et al., 1997
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Choi, Balsam, & Horvitz (2005)
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SPEED
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Nosofsky & Palmeri (1997)
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A
A
A
A
A
A
B
B
B
B
B B
Bri
ghtn
ess
Saturation
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Participant 1
800
1000
1200
1400
1600
1800
2000
5 20 35 50 65 80 95 110125140
Block (N)
Mea
n R
esp
on
se T
ime
SPEED Nosofsky & Palmeri (1997)
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SPEED
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UPDATES
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