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Neurophys 3 exam 1 > Memory > Flashcards

Flashcards in Memory Deck (52)
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1

What makes up the allocortex?

Archicortex and paleocortex

2

What percentage of the human cerebral cortex does the allocortex make up?

10%

3

After dissection, what else can be viewed in the allocortex?

Hippocampal formation (hippocampus, dentate gyrus, subiculum)

4

The hippocampus connects with what?

Septal nuclei, mamillary body, and contralateral hippocampus via fornix

5

What 3 layers make up the hippocampus?

1, 5, and 6

6

What projects to the hippocampus (Ammon's horn)?

Dentate gyrus

7

What 3 layers make up the dentate gyrus?

1, 4, and 6

8

What merges with the entorhial area?

Subiculum

9

The hippocampal formation receives 1° imput from the entorhinal cortex of the parahippocampal gyrus through what?

Perforant and alveolar pathway

10

What does the hippocampal formation play an important role in?

Declarative memory

11

T/F Episodic is factual information

False; episodic is daily episodes of life; semantic is factual information

12

Parahippocampal regions have bidirectional connections with what?

Cerebral cortex

13

The hippocampus has bidirectional connections with what?

Parahippocampal regions

14

What do the connections between the hippocampus and paracampal regions allow for?

Promotes more flexible associations among items; differentiating overlapping patterns; encoding of each unique episode

15

What are hippocampal "place" cells?

Presumably the principal cells in each of the layers that fire in complex bursts when an animal moves through a specific location in an environment

16

Memory functions can be localized to specific regions of the brain such as?

Hippocampus and hippocampal gyrus

17

Memories are caused by changes in what?

Sensitivity of synaptic transmission between neurons as a result of previous mental activity

18

What do the changes in sensitivity cause?

They cause new pathways or facilitated pathways to develop "memory traces"

19

Memory traces can occur at all levels of the nervous system from ____ to ____

Spinal cord to cortex

20

Most memory we associate with intellectual processes is based on what?

Memory traces in cerebral cortex

21

Positive memory is associated with what?

Facilitation

22

Negative memory is associated with _____

Habituation (suppression)

23

Short term memory lasts how long?

Seconds to minutes

24

_____ memory lasts years to entire life

Long term

25

What type of memory lasts days to weeks?

Intermediate long term memory

26

What is the NMDA receptor associated with?

Synaptic learning/memory

27

What does the NMDA receptor bind?

Glutamate

28

What type of ionic channels are associated with the NMDA receptors?

Ligand and voltage gated

29

T/F Memory has stages and is continually changing

True

30

Long term memory has what kind of changes?

Plastic changes