Behavioral and brain imaging studies of AM have become increasingly popular as an example of ecological experimental paradigms. Indeed, AM allows the investigation of real-life memories, which are different from laboratory memories, using stimuli such as lists of words. In this paper we will
briefly review the brain regions associated Inhibitors,research,lifescience,medical with AM retrieval, with a special emphasis on the medial prefrontal cortex and precuneus, their role in self-processing, and their relationships to autobiographical memory processes. Neural correlates of autobiographical memory retrieval Several brain imaging studies using PET or functional magnetic resonance imaging (MRI) have investigated the neural correlates of AM retrieval. Usually in these
studies participants are required Inhibitors,research,lifescience,medical to retrieve and/or re-experience events from their own history in response to personally or experimentally generated retrieval cues. According to results of meta-analyses and reviews,1-3 AMR retrieval entails the activation of an extensive brain network encompassing cortical midline structures (ventral and dorsal medial prefrontal cortex, and posterior cingulate), ventral and dorsal lateral prefrontal cortex, medial (ie, hippocampus) and lateral temporal lobes, temporoparietal junction, and cerebellum. Components of this Inhibitors,research,lifescience,medical network reflect the different cognitive A-1210477 price processes engaged during AM retrieval, such as executive control and retrieval monitoring (ie, dorsal lateral prefrontal cortex), emotion-related processes (ie, ventral medial prefrontal cortex and amygdala), episodic Inhibitors,research,lifescience,medical remembering (ie, hippocampus), self-processing (ie, dorsal medial and ventral medial prefrontal cortex, posterior cingulate), and visuospatial processing (ie, retrosplenial cortex, precuneus, and parietal regions). Martinelli et al4 conducted a new meta-analysis of positron emission tomography Inhibitors,research,lifescience,medical (PET) and functional MRI studies to disentangle brain regions associated
respectively with episodic AM and semantic AM. Episodic AM relates to the recall of personally relevant events acquired in a specific spatiotemporal context and characterized by an autonoetic state of consciousness.5 This latter component not enables conscious recollection of a personal event in its original encoding context and implies mental time travel involving a vivid experience of remembering. Semantic AM relates to the recall of personal general events (ie, repeated events and/or events extended in time) and personal information (ie, birth date). The authors describe a rostrocaudal gradient in brain activation with more posterior regions involved in episodic AM and recollection of sensory-perceptual details and semantic AM retrieval associated with left anterior frontotemporal regions reflecting strategic and semantic retrieval processes.
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