Lecture 17

Question 1

Memory: definition, plasticity, habituations, sensitization

Answer 1

Definition: ability to store info & retrieve it
Plasticity: synapses change w/ experience
LTP - synapses stronger w/ frequent activation
Habituation: learning to ignore novel stimuli > synapse LOSS
Sensitization: ↑ response w/ harmful stimuli > synapse GAIN

Question 2

Explicit (2) & Implicit (3), areas

Answer 2

Explicit/declarative memory (mTL)
- Episodic & semantic

Implicit/non-declarative memory
- Priming (neocortex)
- Associative learning (amygdala/cerebellum)
- Procedural (striatum)

Question 3

Temporal memory (3:5, areas)

Answer 3

Immediate/sensory
+ attention
STM

> working memory:
central executive - PFC
attention controller - ACC
episodic buffer - PL

> phonological loop - BA/WA, visuospatial sketchpad - OL
+ rehearsal
LTM - consolidation & plasticity changes

Question 4

Priming & enhancing memory

Answer 4

Priming: processing changes from previous experience
> resistant to dementia

Enhancing memory: association, chunking (context), motivation

Question 5

Patient HM

Answer 5

Anterograde Amnesia
Proved:
medial temporal - encoding & consolidation of declarative

procedural & longterm are independent

Question 6

Grid cells vs place cells

Answer 6

Grid cells: brains GPS
> entorhinal cortex
> multiple loci, maps

Place cells:
> hippocampus
> fire when traversing a specific locus

Question 7

Brain systems for memory (3)

Answer 7

Hippocampus: initial encoding & declarative
Cerebellum & BG: procedural learning (motor systems)
Cerebral Cortex: LTM
- Semantic memory in same areas activated during encoding