Hippocampus
Major cellular components:
dentate gyrus (major source of inputs)
Ammon�s horn: fields CA1, CA2, CA3/CA4 (integrative role)
subiculum (major source of efferents)
Major pathways and connections:
hippocampus receives highly processed sensory information about internal and external events:
- perforant pathway: hippocampus is reciprocally connected to the entorhinal cortex; entorhinal cortex has connections with other corticial areas (visual, auditory information)
- fimbria-fornix: hippcampus is also reciprocally connected to septum, thalamus and hypothalamus
several pathways that allow for intrahippocampal connections:
- commissural connections: neuronal connections made between neurons in two hippocampi
- Schaffer collaterals: connections between neurons made on one side of hippocampus