![]() During discourse comprehension, word meanings are continuously integrated in a recurrent cortical network. In a recently described model of discourse comprehension word meanings are modeled by a language model pre-trained on a billion word corpus. These hierarchical segmentation phenomena can be considered in the context of processing related to comprehension. The time constant for alignment followed the segmentation hierarchy: sensory cortices aligned most quickly, followed by mid-level regions, while some higher-order cortical regions took more than 10 seconds to align. Likewise, when two groups of participants heard the same sentence in a narrative, preceded by different contexts, neural responses for the groups were initially different and then gradually aligned. ![]() ![]() These hierarchical levels of segmentation are associated with different time constants for processing. Thus, sensory areas like auditory cortex display high frequency segmentation related to the stimulus, while semantic areas like posterior middle cortex display a lower frequency segmentation related to transitions between events. Recent research has revealed that during continuous perception of movies or stories, humans display cortical activity patterns that reveal hierarchical segmentation of event structure.
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