Abstract:
:Stress impacts differently in distinct brain regions. However, so far few studies have focused on the differential responses triggered by stressful stimuli on the intrinsic functional heterogeneity of the hippocampal axis. In this study, we assessed the functional and structural alterations caused by exposure to a chronic unpredictable stress (CUS) paradigm on the dorsal-ventral axis of the hippocampus. The morphological analysis demonstrated that CUS had opposite outcomes in the structure of the dorsal (DH) and ventral hippocampus (VH): whereas in the DH, stress triggered a volumetric reduction as a result of atrophy of CA3 and CA1 apical dendrites, in the VH there was an increase in hippocampal volume concurrent with the increase of CA3 apical dendrites. In parallel, electrophysiological data revealed that stress led to a decrease in VH LTD. In summary, the present work showed that stress impacts differently on the structure and function of the DH and VH which contributes to better understand the overall spectrum of the central effects of stress.
journal_name
Brain Struct Functjournal_title
Brain structure & functionauthors
Pinto V,Costa JC,Morgado P,Mota C,Miranda A,Bravo FV,Oliveira TG,Cerqueira JJ,Sousa Ndoi
10.1007/s00429-014-0713-0subject
Has Abstractpub_date
2015-03-01 00:00:00pages
1205-12issue
2eissn
1863-2653issn
1863-2661journal_volume
220pub_type
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