NRSC 2249 - Neuroanatomical correlates of memory stages

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Description and Tags

Neuroscience

16 Terms

1

hippocampus: memory encoding

  • scanned during encoding of word lists:

    • correct recall activated:

      • hippocampus

      • posterior parahippocampal cortex

      • frontal cortex

  • hippocampal activity at encoding correlated with better recollection

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2

hippocampus: memory retrieval

  • subjects studied word lists before scan

  • asked to differentiate between recall vs. familiarity

    • active for recall

    • not active for familiarity

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3

perirhinal cortex: familiarity

  • encoding similar to hippocampus

  • also activated during recognition based on familiarity

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4

pathways of memory: what

unimodal association areas (cortex) → anterior perirhinal cortex → hippocampal formation

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5

paths of memory: where

multimodal association areas (cortex) → posterior perirhinal cortex → hippocampal formation

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6

anterior hippocampus (MTL)

object recognition memory

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7

posterior hippocampus (MTL)

spatial memory

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8

amygdala (MTL)

emotional memories

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9

diencephalon

Korsakoff’s syndrome

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10

memory networks: anterior temporal (AT)

  • hub in entorhinal/perirhinal

  • emotion and memory regulation

  • familiarity, recognition

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11

memory networks: posterior medial (PM)

  • hub in parahippocampal

  • internally directed thought

  • recollection (episodic)

    • memory for scenes, spatial layouts

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12

hippocampus: spatial memory

  • rodent study in radial arm maze

  • intact hippocampus → preferential discrimination of arms with food

  • hippocampal lesions → inefficient exploration, failure to remember and utilize spatial information

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13

place cells (hippocampus)

  • fundamental in constructing spatial cognitive maps

  • activate in specific locations

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14

grid cells (hippocampus)

  • fundamental in constructing spatial cognitive maps

  • fire at periodic locations within an environment that creates a grid-like pattern

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15

hippocampus: human spatial memory

  • spatial navigation tasks

    • posterior hippocampus larger in taxi drivers with experience

  • specific to spatial tasks

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