Flashcards in Memory Deck (52)
What makes up the allocortex?
Archicortex and paleocortex
What percentage of the human cerebral cortex does the allocortex make up?
After dissection, what else can be viewed in the allocortex?
Hippocampal formation (hippocampus, dentate gyrus, subiculum)
The hippocampus connects with what?
Septal nuclei, mamillary body, and contralateral hippocampus via fornix
What 3 layers make up the hippocampus?
1, 5, and 6
What projects to the hippocampus (Ammon's horn)?
What 3 layers make up the dentate gyrus?
1, 4, and 6
What merges with the entorhial area?
The hippocampal formation receives 1° imput from the entorhinal cortex of the parahippocampal gyrus through what?
Perforant and alveolar pathway
What does the hippocampal formation play an important role in?
T/F Episodic is factual information
False; episodic is daily episodes of life; semantic is factual information
Parahippocampal regions have bidirectional connections with what?
The hippocampus has bidirectional connections with what?
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
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
Memory functions can be localized to specific regions of the brain such as?
Hippocampus and hippocampal gyrus
Memories are caused by changes in what?
Sensitivity of synaptic transmission between neurons as a result of previous mental activity
What do the changes in sensitivity cause?
They cause new pathways or facilitated pathways to develop "memory traces"
Memory traces can occur at all levels of the nervous system from ____ to ____
Spinal cord to cortex
Most memory we associate with intellectual processes is based on what?
Memory traces in cerebral cortex
Positive memory is associated with what?
Negative memory is associated with _____
Short term memory lasts how long?
Seconds to minutes
_____ memory lasts years to entire life
What type of memory lasts days to weeks?
Intermediate long term memory
What is the NMDA receptor associated with?
What does the NMDA receptor bind?
What type of ionic channels are associated with the NMDA receptors?
Ligand and voltage gated
T/F Memory has stages and is continually changing