Publications by authors named "Kazutaka Maeda"

Background/objectives: There is a notable lack of evidence regarding the long-term effects of rehabilitation services, particularly concerning functional recovery and daily living activities of patients following discharge from convalescent rehabilitation wards. This study aimed to clarify the longitudinal changes in activities of daily living and instrumental activities of daily living of patients after discharge from a convalescent rehabilitation ward and the association between the use of rehabilitation services and clinical outcomes.

Methods:  Patients discharged from Japanese convalescent rehabilitation wards in August 2021 were included.

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Seeking out good and avoiding bad objects is critical for survival. In practice, objects are rarely good every time or everywhere, but only at the right time or place. Whereas the basal ganglia (BG) are known to mediate goal-directed behavior, for example, saccades to rewarding objects, it remains unclear how such simple behaviors are rendered contingent on higher-order factors, including environmental context.

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Basal ganglia contribute to object-value learning, which is critical for survival. The underlying neuronal mechanism is the association of each object with its rewarding outcome. However, object values may change in different environments and we then need to choose different objects accordingly.

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Article Synopsis
  • Optogenetics has transformed neuroscience research in small animals, but its effectiveness in non-human primates (NHPs) has shown mixed results.
  • * A centralized database has been created to help researchers track both successful and unsuccessful optogenetic experiments in primates, with contributions from 45 laboratories worldwide.
  • * The database, available on the Open Science Framework, aims to enhance research by sharing over 1,000 injection experiments and offers insights to improve optogenetic methods in NHPs.*
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A primary function of the primate amygdala is to modulate behavior based on emotional cues. To study the underlying neural mechanism, we first inactivated the amygdala locally and temporarily by injecting a GABA agonist. Then, saccadic eye movements and gaze were suppressed only on the contralateral side.

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At each time in our life, we choose one or few behaviors, while suppressing many other behaviors. This is the basic mechanism in the basal ganglia, which is done by tonic inhibition and selective disinhibition. Dysfunctions of the basal ganglia then cause 2 types of disorders (difficulty in initiating necessary actions and difficulty in suppressing unnecessary actions) that occur in Parkinson's disease.

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The basal ganglia, especially the circuits originating from the putamen, are essential for controlling normal body movements. Notably, the putamen receives inputs not only from motor cortical areas but also from multiple sensory cortices. However, how these sensory signals are processed in the putamen remains unclear.

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Choosing valuable objects and rewarding actions is critical for survival. While such choices must be made in a way that suits the animal's circumstances, the neural mechanisms underlying such context-appropriate behavior are unclear. To address this question, we devised a context-dependent reward-seeking task for macaque monkeys.

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Parietofrontal pathways play an important role in visually guided motor control. In this pathway, hand manipulation-related neurons in the inferior parietal lobule represent 3-D properties of an object and motor patterns to grasp it. Furthermore, mirror neurons show visual responses that are concerned with the actions of others and motor-related activity during execution of the same grasping action.

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The first paper on mirror neurons was published in 1992. In the span of over two decades since then, much knowledge about the relationship between social cognitive function and the motor control system has been accumulated. Direct matching of visual actions and their corresponding motor representations is the most important functional property of mirror neuron.

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