科普｜科学家发现了大脑中的“动力刹车”

Core Insights - Neuroscientists have discovered a neural circuit in the brain that acts as a "brake" on motivation, which can hinder individuals from starting tasks, particularly affecting those with mental health disorders like schizophrenia and severe depression [1][2] Group 1: Research Findings - The study published in "Current Biology" identifies a specific neural pathway connecting the ventral striatum and the ventral pallidum that plays a crucial role in inhibiting task execution [1] - Experiments with monkeys showed that when the neural pathway was inhibited, the monkeys exhibited a significant increase in their willingness to start tasks, indicating the pathway's role as a "motivation brake" [2] - The research highlights the difference between patients with depression, whose "brake" is overactive, and those with anxiety, who may avoid tasks due to fear of failure but still possess internal motivation [1][2] Group 2: Implications for Treatment - Current treatments for depression focus on restoring enjoyment in life or reducing anxiety, but many patients still struggle to initiate simple tasks [2] - The study suggests that targeted deep brain stimulation could be a potential method to deactivate the "brake" circuit, offering a new approach to treatment [3] - Researchers also propose non-invasive ultrasound techniques to modulate this circuit, which could lead to significant changes in treatment paradigms for related mental health conditions [3]