scholarly journals The Role of Basal Ganglia Reinforcement Learning in Lexical Ambiguity Resolution

2020 ◽  
Vol 12 (1) ◽  
pp. 402-416
Author(s):  
Jose M. Ceballos ◽  
Andrea Stocco ◽  
Chantel S. Prat
Keyword(s):  
Reinforcement Learning ◽  
Basal Ganglia ◽  
Ambiguity Resolution ◽  
Lexical Ambiguity ◽  
Lexical Ambiguity Resolution

scholarly journals Shared mechanisms of auditory and non-auditory vocal learning in the songbird brain

2021 ◽  
Author(s):  
James McGregor ◽  
Abigail Grassler ◽  
Paul I. Jaffe ◽  
Amanda Louise Jacob ◽  
Michael Brainard ◽  
...  
Keyword(s):  
Reinforcement Learning ◽  
Basal Ganglia ◽  
General Principle ◽  
Auditory Feedback ◽  
Sensory Feedback ◽  
Vocal Learning ◽  
Neural Systems ◽  
Auditory Information ◽  
Vocal Plasticity

Songbirds and humans share the ability to adaptively modify their vocalizations based on sensory feedback. Prior studies have focused primarily on the role that auditory feedback plays in shaping vocal output throughout life. In contrast, it is unclear whether and how non-auditory information drives vocal plasticity. Here, we first used a reinforcement learning paradigm to establish that non-auditory feedback can drive vocal learning in adult songbirds. We then assessed the role of a songbird basal ganglia-thalamocortical pathway critical to auditory vocal learning in this novel form of vocal plasticity. We found that both this circuit and its dopaminergic inputs are necessary for non-auditory vocal learning, demonstrating that this pathway is not specialized exclusively for auditory-driven vocal learning. The ability of this circuit to use both auditory and non-auditory information to guide vocal learning may reflect a general principle for the neural systems that support vocal plasticity across species.

scholarly journals Lexical ambiguity resolution during sentence processing in Parkinson’s disease: An event-related potential study

PLoS ONE ◽  
2017 ◽  
Vol 12 (5) ◽  
pp. e0176281 ◽  
Author(s):  
Anthony J. Angwin ◽  
Nadeeka N. W. Dissanayaka ◽  
Katie L. McMahon ◽  
Peter A. Silburn ◽  
David A. Copland
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Sentence Processing ◽  
Ambiguity Resolution ◽  
Lexical Ambiguity ◽  
Event Related Potential ◽  
Lexical Ambiguity Resolution ◽  
Potential Study

Лексическая неоднозначность в экспериментальных исследованиях: метаанализ

2020 ◽  
pp. 43-51
Author(s):  
Анжелика Дубасова
Keyword(s):  
Language Processing ◽  
Ambiguity Resolution ◽  
Experimental Studies ◽  
Lexical Ambiguity ◽  
Point Of View ◽  
Lexical Ambiguity Resolution ◽  
Ambiguous Words ◽  
Main Factors ◽  
The Difference ◽  
The Right

The article analyses experimental studies of lexical ambiguity (polysemy and homonymy). In total, 42 papers published between 1981 and 2017 were selected for analysis. Selected works were analyzed from the point of view of a) interaction of the main factors of lexical ambiguity resolution (meaning dominance and context), b) modularity/interactivity of language systems. The choice of these issues was caused by the fact that, despite a significant number of papers addressing them, a common theoretical model of lexical ambiguity resolution is still missing. The analysis concluded that none of the existing models could be chosen as the only true one. I believe that it is more promising to combine all models into one; in this case, we should not talk about “models” but about “algorithms” or “strategies”. This merge is compatible with the results of studies of hemispheric asymmetry, which showed that the right and left hemispheres differently process ambiguous words. This difference is projected on the difference between the two main points of view on language processing, interactive and modular. Also, as a result of the analysis, the properties of meaning dominance and context as the main factors influencing the perception of ambiguity are summarized, and the ways and possibilities of their interaction are determined. These factors can participate in the process of resolving ambiguity autonomously or together, with different functions, speed, and levels of perception.

scholarly journals The influence of global discourse on lexical ambiguity resolution

2000 ◽  
Vol 28 (2) ◽  
pp. 236-252 ◽  
Author(s):  
Hoang Vu ◽  
George Kellas ◽  
Ktmberly Metcalf ◽  
Ruth Herman
Keyword(s):  
Ambiguity Resolution ◽  
Lexical Ambiguity ◽  
Lexical Ambiguity Resolution ◽  
Global Discourse
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