Proximodistal Organization of the CA2 Hippocampal Area

The proximodistal axis is considered a major organizational principle of the hippocampus. At the interface between the hippocampus and other brain structures, CA2 apparently breaks this rule. The region is involved in social, temporal, and contextual memory function, but mechanisms remain elusive. H...

Teljes leírás

Elmentve itt :
Bibliográfiai részletek
Szerzők: Fernandez-Lamo Ivan
Gomez-Dominguez Daniel
Sanchez-Aguilera Alberto
Oliva Azahara
Morales Victoria Aixa
Valero Manuel
Cid Elena
Berényi Antal
Menendez de la Prida Liset
Dokumentumtípus: Cikk
Megjelent: 2019
Sorozat:CELL REPORTS 26 No. 7
doi:10.1016/j.celrep.2019.01.060

mtmt:30540968
Online Access:http://publicatio.bibl.u-szeged.hu/18008
Leíró adatok
Tartalmi kivonat:The proximodistal axis is considered a major organizational principle of the hippocampus. At the interface between the hippocampus and other brain structures, CA2 apparently breaks this rule. The region is involved in social, temporal, and contextual memory function, but mechanisms remain elusive. Here, we reveal cell-type heterogeneity and a characteristic expression gradient of the transcription factor Sox5 within CA2 in the rat. Using intracellular and extracellular recordings followed by neurochemical identification of single cells, we find marked proximodistal trends of synaptic activity, subthreshold membrane potentials, and phase-locked firing coupled to theta and gamma oscillations. Phase-shifting membrane potentials and opposite proximodistal correlations with theta sinks and sources at different layers support influences from different current generators. CA2 oscillatory activity and place coding of rats running in a linear maze reflect proximodistal state-dependent trends. We suggest that the structure and function of CA2 are distributed along the proximodistal hippocampal axis.
Terjedelem/Fizikai jellemzők:1734-1764
ISSN:2211-1247