Brain activity related to encoding and retrieval of the images of human faces in working memoryстатьяТезисы
Статья опубликована в высокорейтинговом журнале
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Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 16 февраля 2016 г.
Аннотация:This study investigates brain activity related to encoding and retrieving images of human faces in working memory. 58 subjects (20.9 ± 5.1 years old) participated in two parts of the test. First part: in each trial subjects memorized a shortly presented face and, upon consequent presentation of a pair of faces, indicated if the memorized face was on the left/right/absent. Second part: subjects memorized a pair of faces and responded to a single face (same choices). ERPs (21 channels, monopolar) were registered for a single face presentation in both parts. We calculated averaged ERPs for encoding and recognition. ERPs were presented as equivalent dipole sources (2-dipole model, coefficient > 0.95). Amount of dipoles in each brain structure (Talairach Atlas) was calculated for 0–500 ms post stimulus. We compared brain activity related to faces encoding and recognition. Right orbitofrontal cortex (OFC) was activated stronger in 0–150 ms interval in encoding and from 300 to 500 ms in recognition. Encoding showed stronger activation of prefrontal cortex (PFC) in both hemispheres (0–500 ms) and right parahippocampal gyrus (150–500 ms). Recognition was related to higher activation of left hippocampus (0–500 ms) and middle temporal gyrus (MTG) (100–500 ms). Findings correspond with previously reported activation of MTG in recognition of familiar faces. Higher activation of PFC in faces encoding can be related to higher demands on working memory central executive compared to faces recognition. Later OFC activation in recognition can be explained by longer decision-making in this task.