entorhinal cortex (Brodmann's area 28)

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Structure

  • cytoarchitecturally, the entorhinal cortex transforms the 4 layers of the allocortex into the 6 layers of the neocortex
  • the allocortical entorhinal region does not gradually transform into the temporal isocortex
  • instead, there is an extended stretch of "transentorhinal" cortex with interdigitation of allocortical & isocortical laminae[2]

The transentorhinal region thus consists of 6 layers, distinct from other neocortical regions.

Afferents

Efferents

* Neurons of layers 2 & 3 of the lateral entorhinal cortex send axons into the dentate gyrus to synapse on granule cell dendrites in the outer 2/3 of the molecular layer in the perforant pathway of the trisynaptic circuit.

# Neurons of layers 2 & 3 of the medial entorhinal cortex send axons into the hippocampus to synapse on basilar dendrites of hippocampal CA1 pyramidal cells in the alvear pathway.

Pathology

More general terms

Additional terms

Component of

References

  1. The Human Nervous System, George Paxinos, Academic Press, San Diego CA 1990
  2. 2.0 2.1 2.2 Braak H, Braak E. On areas of transition between entorhinal allocortex and temporal isocortex in the human brain. Normal morphology and lamina-specific pathology in Alzheimer's disease. Acta Neuropathol (Berl). 1985;68(4):325-32. PMID: https://www.ncbi.nlm.nih.gov/pubmed/4090943