Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/62465
Title: Age-related alterations in phase synchronization of oxyhemoglobin concentration changes in prefrontal tissues as measured by near-infrared spectroscopy signals
Authors: Tan, Q
Zhang, M 
Wang, Y
Zhang, M
Wang, B
Xin, Q
Li, Z
Keywords: Cerebral oxygenation
Spontaneous oscillations
Near-infrared spectroscopy
Wavelet coherence
Wavelet phase coherence
Functional connectivity
Issue Date: 2016
Publisher: Academic Press
Source: Microvascular research, 2016, v. 103, p. 19-25 How to cite?
Journal: Microvascular research 
Abstract: The prefrontal cortex plays an important role in planning complex cognitive behavior, personality expression, and decision making. This study aims to assess the phase synchronization of signals of the oxyhemoglobin concentration changes (Delta[HbO(2)]) in the left and right prefrontal tissues through near-infrared spectroscopy (NIRS) with wavelet phase coherence (WPCO) method. The NIRS signals were continuously recorded from the left and right prefrontal lobes in 43 healthy elderly subjects (age: 69.6 +/- 8.4 years) and 40 young healthy subjects (age: 24.5 +/- 1.7 years) during the resting state. Phase synchronization between the left and right prefrontal oscillations in six frequency intervals (I, 0.6-2 Hz; II, 0.145-0.6 Hz; III, 0.052-0.145 Hz; IV, 0.021-0.052 Hz; V, 0.0095-0.021 Hz; and VI, 0.005-0.0095 Hz) was analyzed using the WPCO method. The WPCO values of elderly subjects were significantly lower in frequency intervals I (F = 7376, p = 0.010) and III (F = 6.418, p = 0.016) than those of the young subjects. Low phase coherence in intervals I and III indicates reduced synchronization of cardiac activity in the prefrontal area and weakened prefrontal functional connectivity, respectively.
URI: http://hdl.handle.net/10397/62465
ISSN: 0026-2862
EISSN: 1095-9319
DOI: 10.1016/j.mvr.2015.10.002
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

4
Last Week
0
Last month
Citations as of Oct 8, 2017

WEB OF SCIENCETM
Citations

4
Last Week
0
Last month
Citations as of Oct 14, 2017

Page view(s)

44
Last Week
0
Last month
Checked on Oct 15, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.