TY - JOUR
T1 - The effect of hippocampal function, volume and connectivity on posterior cingulate cortex functioning during episodic memory fMRI in mild cognitive impairment
AU - Papma, Janne M.
AU - Smits, Marion
AU - De Groot, Marius
AU - Mattace-Raso, Francesco U. S.
AU - van der Lugt, Aad
AU - Vrooman, Henri A.
AU - Niessen, Wiro J.
AU - Koudstaal, Peter J.
AU - van Swieten, John C.
AU - van der Veen, Frederik M.
AU - Prins, Niels D.
PY - 2017/9/1
Y1 - 2017/9/1
N2 - Objectives: Diminished function of the posterior cingulate cortex (PCC) is a typical finding in early Alzheimer’s disease (AD). It is hypothesized that in early stage AD, PCC functioning relates to or reflects hippocampal dysfunction or atrophy. The aim of this study was to examine the relationship between hippocampus function, volume and structural connectivity, and PCC activation during an episodic memory task-related fMRI study in mild cognitive impairment (MCI). Method: MCI patients (n = 27) underwent episodic memory task-related fMRI, 3D-T1w MRI, 2D T2-FLAIR MRI and diffusion tensor imaging. Stepwise linear regression analysis was performed to examine the relationship between PCC activation and hippocampal activation, hippocampal volume and diffusion measures within the cingulum along the hippocampus. Results: We found a significant relationship between PCC and hippocampus activation during successful episodic memory encoding and correct recognition in MCI patients. We found no relationship between the PCC and structural hippocampal predictors. Conclusions: Our results indicate a relationship between PCC and hippocampus activation during episodic memory engagement in MCI. This may suggest that during episodic memory, functional network deterioration is the most important predictor of PCC functioning in MCI. Key Points: • PCC functioning during episodic memory relates to hippocampal functioning in MCI. • PCC functioning during episodic memory does not relate to hippocampal structure in MCI. • Functional network changes are an important predictor of PCC functioning in MCI.
AB - Objectives: Diminished function of the posterior cingulate cortex (PCC) is a typical finding in early Alzheimer’s disease (AD). It is hypothesized that in early stage AD, PCC functioning relates to or reflects hippocampal dysfunction or atrophy. The aim of this study was to examine the relationship between hippocampus function, volume and structural connectivity, and PCC activation during an episodic memory task-related fMRI study in mild cognitive impairment (MCI). Method: MCI patients (n = 27) underwent episodic memory task-related fMRI, 3D-T1w MRI, 2D T2-FLAIR MRI and diffusion tensor imaging. Stepwise linear regression analysis was performed to examine the relationship between PCC activation and hippocampal activation, hippocampal volume and diffusion measures within the cingulum along the hippocampus. Results: We found a significant relationship between PCC and hippocampus activation during successful episodic memory encoding and correct recognition in MCI patients. We found no relationship between the PCC and structural hippocampal predictors. Conclusions: Our results indicate a relationship between PCC and hippocampus activation during episodic memory engagement in MCI. This may suggest that during episodic memory, functional network deterioration is the most important predictor of PCC functioning in MCI. Key Points: • PCC functioning during episodic memory relates to hippocampal functioning in MCI. • PCC functioning during episodic memory does not relate to hippocampal structure in MCI. • Functional network changes are an important predictor of PCC functioning in MCI.
KW - Diffusion tensor imaging
KW - Episodic memory task-related functional MRI
KW - Hippocampus
KW - Mild cognitive impairment
KW - Posterior cingulate cortex
UR - http://resolver.tudelft.nl/uuid:4e265b8b-1110-40d1-9e78-4f793e03a00e
UR - http://www.scopus.com/inward/record.url?scp=85015043631&partnerID=8YFLogxK
U2 - 10.1007/s00330-017-4768-1
DO - 10.1007/s00330-017-4768-1
M3 - Article
AN - SCOPUS:85015043631
SN - 0938-7994
VL - 27
SP - 3716
EP - 3724
JO - European Radiology
JF - European Radiology
IS - 9
ER -