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    • 12. 发明申请
    • MOBILE BRAIN-BASED DEVICE FOR USE IN A REAL WORLD ENVIRONMENT
    • 用于实际世界环境的基于移动电脑的设备
    • WO2005106762A2
    • 2005-11-10
    • PCT/US2005/012541
    • 2005-04-14
    • NEUROSCIENCES RESEARCH FOUNDATION, INC.SETH, Anil, K.MCKINSTRY, Jeffrey, L.EDELMAN, Gerald, M.KRICHMAR, Jeffrey, L.
    • SETH, Anil, K.MCKINSTRY, Jeffrey, L.EDELMAN, Gerald, M.KRICHMAR, Jeffrey, L.
    • G06F19/00
    • G06F15/18G06F3/015G06K9/629G06N3/004G06N3/049G16H50/50
    • A mobile brain-based device BBD includes a mobile base equipped with sensors and effectors (Neurally Organized Mobile Adaptive Device or NOMAD), which is guided by a simulated nervous system that is an analogue of cortical and sub-cortical areas of the brain required for visual processing, decision-making, reward, and motor responses. These simulated cortical and sub-cortical areas are reentrantly connected and each area contains neuronal units representing both the mean activity level and the relative timing of the activity of groups of neurons. The brain-based device BBD learns to discriminate among multiple objects with shared visual features, and associated "target" objects with innately preferred auditory cues. Globally distributed neuronal circuits that correspond to distinct objects in the visual field of NOMAD 10 are activated. These circuits, which are constrained by a reentrant neuroanatomy and modulated by behavior and synaptic plasticity, result in successful discrimination of objects. The brain-based device BBD is moveable, in a rich real-world environment involving continual changes in the size and location of visual stimuli due to self-generated or autonomous, movement, and shows that reentrant connectivity and dynamic synchronization provide an effective mechanism for binding the features of visual objects so as to reorganize object features such as color, shape and motion while distinguishing distinct objects in the environment.
    • 基于移动脑的设备BBD包括配备有传感器和效应器(神经有机移动自适应装置或NOMAD)的移动基座,其由模拟神经系统引导,该模拟神经系统是大脑所需的皮层和皮质下皮质区域的类似物 视觉处理,决策,奖励和运动反应。 这些模拟的皮质和皮质区域是可重复连接的,每个区域包含表示神经元组的平均活动水平和相对时间的神经元单位。 基于脑的设备BBD学习使用共享的视觉特征和相关联的“目标”对象与具有本来优选的听觉线索的多个对象之间进行区分。 对应于NOMAD 10的视野中的不同物体的全球分布的神经元电路被激活。 这些由折返性神经解剖学限制并由行为和突触可塑性调节的电路导致对象的成功辨别。 基于大脑的设备BBD可以在丰富的现实环境中移动,包括由于自我生成或自主运动引起的视觉刺激的大小和位置的不断变化,并且表明可重入连接性和动态同步为 绑定视觉对象的特征,以便重新组织对象特征,如颜色,形状和运动,同时区分环境中的不同对象。
    • 14. 发明申请
    • SOLVING THE DISTAL REWARD PROBLEM THROUGH LINKAGE OF STDP AND DOPAMINE SIGNALING
    • 通过STDP和DOPAMINE信号的链接解决远程问题
    • WO2008083335A2
    • 2008-07-10
    • PCT/US2007/089129
    • 2007-12-28
    • NEUROSCIENCES RESEARCH FOUNDATION, INC.IZHIKEVICH, Eugene, M.
    • IZHIKEVICH, Eugene, M.
    • G06N3/08
    • G06N3/049G06N3/02G06N3/063G06N3/0635G06N99/005
    • In Pavlovian and instrumental conditioning, rewards typically come seconds after reward-triggering actions, creating an explanatory conundrum known as the distal reward problem or the credit assignment problem. How does the brain know what firing patterns of what neurons are responsible for the reward if (1) the firing patterns are no longer there when the reward arrives and (2) most neurons and synapses are active during the waiting period to the reward? A model network and computer simulation of cortical spiking neurons with spike-timing-dependent plasticity (STDP) modulated by dopamine (DA) is disclosed to answer this question. STDP is triggered by nearly-coincident firing patterns of a presynaptic neuron and a postsynaptic neuron on a millisecond time scale, with slow kinetics of subsequent synaptic plasticity being sensitive to changes in the extracellular dopamine DA concentration during the critical period of a few seconds after the nearly-coincident firing patterns. Random neuronal firings during the waiting period leading to the reward do not affect STDP, and hence make the neural network insensitive to this ongoing random firing activity. The importance of precise firing patterns in brain dynamics and the use of a global diffusive reinforcement signal in the form of extracellular dopamine DA can selectively influence the right synapses at the right time.
    • 在巴甫洛夫和工具条件下,奖励通常会在奖励触发动作之后几秒钟,创造一个被称为远程奖励问题或信用分配问题的解释性难题。 如果(1)当奖励到达时,射击模式不再在那里,(2)大多数神经元和突触在等待期间是活跃的,大脑如何知道什么是神经元对于奖励的触发模式? 披露了由多巴胺(DA)调制的具有刺激时间依赖性可塑性(STDP)的皮层加标神经元的模型网络和计算机模拟来回答这个问题。 STDP在几毫秒的时间尺度上由突触前神经元和突触后神经元的几乎一致的发射模式触发,随后的突触可塑性的缓慢动力学对于在数秒后的几秒的关键时期内对细胞外多巴胺DA浓度的变化敏感 几乎一致的射击模式。 导致奖励的等待期间的随机神经元激发不会影响STDP,因此使神经网络对这种持续的随机射击活动不敏感。 精确射击模式在脑动力学中的重要性以及以细胞外多巴胺DA的形式使用全局扩散加强信号的选择可以选择性地在正确的时间影响右侧突触。