Chinese Journal of Rehabilitation Theory and Practice ›› 2025, Vol. 31 ›› Issue (8): 947-957.doi: 10.3969/j.issn.1006-9771.2025.08.011

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Characteristics of time-domain and time-frequency of Chinese word-picture matching task-related electroencephalogram in patients with post-stroke aphasia

ZHANG Zihan1, GUAN Jinzhi1, HUANG Xing2, ZHOU Li1, ZHANG Yaxuan1, ZHANG Mengyuan1, CHANG Jingling1()   

  1. 1. Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100070, China
    2. Beijing Universitity of Chinese Medicine Third Affiliated Hospital, Beijing 100029, China
  • Received:2025-03-03 Revised:2025-08-05 Published:2025-08-25 Online:2025-09-01
  • Supported by:
    Beijing Natural Science Foundation (General)(7242243);Dongzhimen Hospital, Beijing University of Chinese Medicine Talent Cultivation Program(DZMG-LJRC0016);Dongzhimen Hospital, Beijing University of Chinese Medicine Enhancing Clinical Research and Transformation Capacity Pilot Project(DZMG-XZYY-23008)

Abstract:

Objective To explore characteristics of time-domain and time-frequency of task-related electroencephalogram (EEG) in patients with post-stroke aphasia (PSA).

Methods From January, 2018 to December, 2021, 18 PSA patients (PSA group) were recruited from Dongzhimen Hospital, Beijing University of Chinese Medicine, and nine healthy subjects (control group) were recruited with matched gender, age and education level. EEG data based on the Chinese word-picture matching task were collected, and the average amplitude of N400 and event-related synchronization (ERS) /desynchronization (ERD) were analyzed. The PSA group was assessed with Chinese Rehabilitation Research Center Aphasia Examination (CRRCAE).

Results The effect of N400 was significant on left frontal, central frontal, right frontal, left central and central areas. The average amplitude of N400 was higher on the frontal area in PSA group than in the control group, and it was lower on right temporal-parietal area. For word-picture mismatching, average amplitude of N400 at FPZ was moderately correlated with auditory comprehension (r = 0.483, P < 0.05), the average amplitude of N400 at T8 was moderately correlated with repetition (r = 0.584, P < 0.05) and reading aloud (r = 0.556, P < 0.05), and the average amplitude of N400 at P6 was moderately correlated with speaking (r = 0.476, P < 0.05) and reading (r = 0.502, P < 0.05). For word-picture matching, the average amplitude of N400 at P7 was moderately negatively correlated with calculation (r = -0.481, P < 0.05). Compared with the control group, the energy decreased in θ and α frequency bands with absence of ERS in PSA group, and it increased in β frequency band with absence of ERD.

Conclusion The activities of Chinese word-picture matching task-related EEG have been inhibited on right temporal-parietal area for PSA patients, and it compensatively increases on frontal area, while the energy decreases in θ and α frequency bands with ERS deficiency, and increases in β frequency band with ERD deficiency.

Key words: post-stroke aphasia, Chinese word-picture matching task, electroencephalography, event-related potential