The Usefulness of Functional Near-Infrared Spectroscopy for the Assessment of Post-Stroke Depression.

Post-stroke depression (PSD) is the most common mood disorder following stroke and is also the main factor that limits the recovery and rehabilitation of patients with stroke. The prevalence of PSD is ~30%. Since there is no gold standard for the diagnosis and evaluation of PSD, it is important to raise awareness of PSD and to establish methods for its evaluation, early diagnosis, and treatment.

Changing Artificial Playback Speed and Real Movement Velocity Do Not Differentially Influence the Excitability of Primary Motor Cortex during Observation of a Repetitive Finger Movement.

Action observation studies have investigated whether changing the speed of the observed movement affects the action observation network. There are two types of speed-changing conditions; one involves "changes in actual movement velocity," and the other is "manipulation of video speed." Previous studies have investigated the effects of these conditions separately, but to date, no study has directly investigated the differences between the effects of these conditions.