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Dopamine and Adaptive Memory (DA (Evidence indicates that the release of…
Dopamine and Adaptive Memory
DA
DA is known to play a
key role in
motivated behavior
DA has a
direct impact on
memory formation
in the HPC
Evidence indicates that the release of DA signals motivationally important events and behaviors
Phasic Response:
neurons respond not to the reward but to the predictive cue instead
. Furthermore, when the reward is expected but fails to arrive, the neurons are briefly inhibited below their baseline response rates.
Recent evidence indicates that DA also respond to the novel surprising events, including punishment
DA is a signal for learning, released
in response not only to salient events but also to
expectations
.
MOTIVATION INFLUENCES MEMORY
Dopamine ensures that memories are relevant and
accessible for future adaptive behavior.
Adaptive Memory
Dopamine ensures that memories are relevant and accessible for future adaptive behavior.
Adaptive memory insights could provide insights into what we remember and why.
Understanding adaptive memory helps to explain
what is remembered and why
.
The HPC
Long-term Memory
Episodic Memory are formed rapidly and rich in contextual details
Episodic memories are thought to be relational - encoding relationships between multiple elements of an event
Episodic memory is distinct from brain systems forming emotional memory, habit learning, etc.
The findings emphasize a role for the HPC that extends beyond memory for objects and locations, to include motivated, goal-directed behavior
The Cortical MTL
The medial temporal lobe cortices
The MTL, in addition to its role in remembering the past, also supports the ability to imagine specific episodes in the future
with direct implications on decision-making
**Because of their relational structure, episodic memories are flexible:
they allow relevant information from the past to be brought to bear as needed to guide future behavior.**
Future Goal-Directed Behavior
MOTIVATION INFLUENCES MEMORY
MEMORY
- What is remembered and why?