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Cognitive control (Brain damage (Frontal lobe syndromes (anatomy…
Cognitive control
Brain damage
Frontal lobe syndromes
anatomy
Orbital/Medial
Cannot clearly be destinguished
Emotional instinctive behavior
Tasks
Go no go
Facilitate attention
Pursuit goals
Orbital
Reduced spontaneity
Gambling
self-regulatory disorder
impaired social behavior
altered sexual behavior
impaired olfacory discimiation
Dorsolateral
temporal integraion
short term memory
Preparatory set for action
reconcile past with future
Disorders of attention
Selective
temporal continuity of focused attention
short term mem
forgets to remember
Recal/recognition intact
Planning
Permeates all action domains
Mostly complex
Memory of the future
poor strategy formation
Motor memory
Speech
ascribed to syntagmatic part of language
voluntary action
Tasks
WCST
Delay tasks
difficulties controlling impulses
apathy
associative learning
Persevation
Increased distractebility
What is it
Ability to orchestrate thought and action in accordance with internal goals
Coordinate lower-level processes along common theme
Top down processing
Ability to select a weaker task-relevant response
Theory of PFC function
(Miller)
Assumptions (principles)
Brain is competetive
Strongest source of info wins
Mutually inhibitory interactions
FPC must have access to diverse info
About internal and external stat
Anatomically well situated
Connections
lateral/mid-dorsal PFC
associated with sensory neocortex
dPFC
Motor areas
Basal ganglia
automated behavior
orbital/medial PFC
Limbic structures
Long term memory
affect and motivation
Interconnections within PFC
Multimodal
connected to association corex
Projections from pfc
Inferior temporal cortex
Identification of intended stimulus relies on interaction between PFC and posterior cortex
Active maintainence of rule
Delay period activity
Sustained neural activity PFC
selectively maintains task-relevant info
Learning across time
(associative learning)
When behavoir or reward comes later
Maintain representation over time
Dopamine
Predicted reward
prediction error in PFC
Role of PFC in CC
Bias signal to keep brain on track for goal
guide flow of neural activity
Useful for ambiguous stimuli or multiple responses
Cues in environment activate internal representation
PFC selects appropriate action
Feedback signals
direct attention
Signal motor system
response selection
Inhibitory control
Signal intermediate systems
Support working memory
Top down
robust against distraction
but felxible when needed
Multimodality and integration
Practiced tasks rely less on PFC
autonoetic awareness
Knowledge of self
temporal memory
Brain areas
OFC
ACC
Modular
PFC will guide
Highest level of hirarchy
PFC exhibits the properties required to support a role in cognitive control.
sustained activity that is robust to interference;
multimodal convergence and integration of behaviorally
relevant information;
feedback pathways that can exert biasing influences on other
structures throughout the brain;
and ongoing plasticity that is adaptive to the demands of new tasks