Abstract:

Objective To clarify the characteristics of electroencephalogram (EEG) power spectrum network of right hemisphere in patients with post-stroke aphasia (PSA) after left brain damaged.Methods From December, 2018 to June, 2019, twelve PSA patients with left hemisphere injury were recruited and twelve healthy adults were matched as control group. China Rehabilitation Research Center aphasia examination (CRRCAE) was used to evaluated the linguistic function, and the EEG was collected. The functional connection characteristics of Alpha and Theta power spectrum were compared, and the correlation with language items was analyzed.Results In PSA patients, the functional connection enhanced in Alpha and Theta frequency bands of central area, frontal, parietal and frontal-parietal joint areas, and decreased in Theta frequency bands of temporoparietal, parietal-occipital area, frontal, fronta-parietal and frontal central areas. The enhancement of alpha frequency functional connection from the right parietal occipital region to the central region was significantly correlated to the reduction of the expression ability (P < 0.05), while the weakening of theta frequency functional connection between the right parietal occipital region and the forehead and the center of the forehead was significantly correlated to the ability of speaking, reading, copying, dictation and calculation ( r= -0.676~-0.717, P < 0.05). Conclusion EEG power spectrum network can reflect the reorganization of right brain function network, and the change of right frontal parietal central network function connection may be closely related to PSA language injury and recovery.

Key words: stroke, aphasia, electroencephalogram, power spectrum network, brain