Hippocampus: Memory And Amnesia Flashcards
What is lambic
It is an anatomical term, not really a functional term
Limbic structures
Structures bordering the ventricular system and midline, including cingulate cortex, primary olfactory cortex, parahippocampal gyrus, amygdala, hippocampus, septum
Limbic system
Phrase commonly used to refer to lambic regions and related tracts, but often used incorrectly to suggest a single functional system or to include regions that are not limbic
Is the basal forebrain part of the limbic system
No
Limbic structures in the medial temporal lobe
Uncus
Parashippocampal gyrus
Isthmus of cingulate gyrus
Limbic structures in the subcortical medial temporal lobe
Amygdala, within uncus
Hippocampus (within PH gyrus)
How does the hippocampus sits _______ to inferior horn of the lateral ventricle
Medial and ventral
Amygdala sits ______ to hippocampus
Mostly rostral
Amygdala in relationship to the hippocampus
Amygdala extends caudally and just superior/dorsal to hippocampus
Entorhinal cortex
Tail of the seahorse
- parahippocampal gyrus
- subiculum
Hippocampus proper
- hippocampus
- dentate
What is the hippocampal complex derived from
Folding of cortex
What layers are the hippocampal complex made up of
- polymorphic layer
- pyramidal cell layer
- molecular layer
How do signals travels in the hippocampal complex
Cortex-entorhinal-dentate-hippocampus(CA2)-CA1-subiculum-cortex
Comes in through cortex and back out to different part of cortex
What is the tri synaptic circuit of the hippocampal complex
Takes info from the cortex and back out to the cortex.
Long term memory
What is the cellular/circuit basis of memory
Tri synaptic circuit of the hippocampal complex
Promotes long term memory of information for single sensory modality or can promote multi sensory memories
Tri synaptic circuit of the hippocampal complex
What does the hippcampal complex receive input from
Amygdala and sensory/association neocortex
Where does the hippocampal complex send projections to
Amygdala and sensory/association neocortex
What is the output to the fornix from the hippocampal complex
Hypothalamic nuclei of all kinds
- behavioral
- hormonal
- unconscious involuntary responses