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Two-photon imaging of neuronal activity in motor cortex of marmosets during upper-limb movement tasks

机译:上肢运动任务期间mar猴运动皮层神经元活动的双光子成像

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摘要

Two-photon imaging in behaving animals has revealed neuronal activities related to behavioral and cognitive function at single-cell resolution. However, marmosets have posed a challenge due to limited success in training on motor tasks. Here we report the development of protocols to train head-fixed common marmosets to perform upper-limb movement tasks and simultaneously perform two-photon imaging. After 2–5 months of training sessions, head-fixed marmosets can control a manipulandum to move a cursor to a target on a screen. We conduct two-photon calcium imaging of layer 2/3 neurons in the motor cortex during this motor task performance, and detect task-relevant activity from multiple neurons at cellular and subcellular resolutions. In a two-target reaching task, some neurons show direction-selective activity over the training days. In a short-term force-field adaptation task, some neurons change their activity when the force field is on. Two-photon calcium imaging in behaving marmosets may become a fundamental technique for determining the spatial organization of the cortical dynamics underlying action and cognition.
机译:行为动物中的双光子成像已揭示了与单细胞分辨率下的行为和认知功能有关的神经元活动。然而,由于在运动任务训练方面的成功有限,mar猴提出了挑战。在这里,我们报告协议的发展,以训练头部固定的普通mar猴,以执行上肢运动任务,并同时执行两光子成像。经过2到5个月的培训课程后,固定式mos猴可以控制manipulandum将光标移动到屏幕上的目标。在这项运动任务表现期间,我们对运动皮层中的2/3神经元层进行了两光子钙成像,并从细胞和亚细胞分辨率的多个神经元中检测了与任务相关的活动。在达到两个目标的任务中,一些神经元在训练期间表现出方向选择性活动。在短期力场适应任务中,当力场打开时,某些神经元会改变其活动。行为mar猴中的双光子钙成像可能成为确定作用和认知基础的皮层动力学空间组织的一项基本技术。

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