Limbic Association Cortex Flashcards
True or False:
The limbic system is an integrative network of brain structures lying in the medial and inferior aspects of the brain
True
What is the oldest system in the brain
Limbic system
What are the 4 basic functional categories of the limbic system (HOME)
- Homeostasis
- Olfaction
- Memory
- Emotions and drives
What is the key structure associated with homeostasis
Hypothalamus
What is the key structure associated with olfaction
Olfactory cortex
What is the key structure associated with memory
Hippocampal formation
What is the key structure associated with emotions and drives
Amygdala
True or False:
The limbic system forms a ring on the medial aspect of the brain
True
What does the limbic system mainly consist of (2)
- Cingulate cortex
2. Parahippocampal gyri
How many layered hippocampal formation gyri are in the limbic system
3
What does the hippocampal formation consist of (3)
- Dentate gyrus
- Hippocampus proper
- Subiculum (in and out door)
Where does the hippocampal formation and the amygdala lie
Along the floor of the temporal horn of the lateral ventricle
True or False:
The amygdala and the hippocampal formation are cortical areas that are continuous with surface cortical structures
True
Where does the hippocampal formation end
Mamillary bodies
True or False:
The hippocampal formation is crucial to recent memory function
True
Where do inputs to the hippocampus come from
Entorhinal cortex
What are the 2 input pathways of the entorhinal cortex
- Perforant pathway
2. Alvear pathway
Where does the perforant pathway go
Dentate
Where does the alvear pathway go
Hippocampus proper
Which pathway is the major input pathway the perforant or alvear pathway
The perforant pathway
Where do outputs from the hippocampal formation go
Back via the subiculum to the entorhinal cortex
Where do outputs to anterior association cortices go
Through the fornix
What is the main way out of the hippocampal formation
Entorhinal cortex
What are the 2 ways out of the hippocampal formation
- Fornix
2. Entorhinal cortex
What are the main subcortical connections of the hippocampal formation (5)
- Contralateral hippocampus
- Anterior nucleus of thalamus
- MEdidorsal nucleus of thalamus
- Mammillary bodies
- Septal nuclei
What is lost with bilateral destruction of the hippocampus and parahippocampal gyrus
Profound deficit in forming new arbitrary associations and new episodic memories
What is preserved with bilateral destruction of the hippocampus and parahippocampal gyrus (3)
- Preserved acquisition of skills (mirror reading)
- Preserved mirror drawing
- Preserved item specific priming in stem completion
True or False:
Working memory is your present and long term memory is your past
True
What do declarative episodic and semantic memory depend on
Medial temporal lobes
True or False:
HM had preservation of prior knowledge and remote memories
True
True or False:
HM had loss of memory for recently experienced events
True
What does it mean if something is in long term memory and you can’t remember it
You are having a retrieval problem
True or False:
HM had anterograde amnesia and some retrograde amnesia
True
True or False:
Our episodic memories are emotional
True
What type of memory did HM have deficits with
Declarative memory or facts and events
True or False:
The amygdala is involved in emotion
True
Where is the amygdala located
Just anterior to the hippocampal formation in the anterior temporal lobe
True or False:
The amygdala is the reason we have episodic emotional memories of the past
True
Does the hippocampus have a direct connection to the olfactory cortex
Nope
What has a direct connection to the olfactory cortex
Amygdala
True or False:
Like the hippocampal formation the amygdala has connections with association cortices and subcortical structures
True
True or False:
The amygdala participates in networks mediating all major limbic system activities (HOME)
True
Good luck gentlemen
Fuck shit up
