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Bio-inspired Tactile FA-I Spiking Generation under Sinusoidal Stimuli

Journal of Bionic Engineering 2016年第4期13卷 612-621页

作者： Zhengkun Yi Yilei Zhang School of Mechanical and Aerospace Engineering Nanyang Technological University Manyang Avenue 639798 Singapore

For the design and development of advanced prosthetic limbs, many attempts have been made to restore the function of mechanoreceptors using artificial tactile sensors. Mechanoreceptors in human skin, which make dexterous manipulation pos- sible, respond to the mechanical stimuli in the form of spike trains. In this paper, a bin-inspired approach to replicate the Fast Adapting type I （FA-I） mechanoreceptor is developed, where piezoelectric materials, such as polyvinylidene difluoride （PVDF） films, are used to generate continuous analog electrical signals; then the analog signals are successfully converted into spike trains using the spiking neuron model. By comparing with spike trains measured from the glabrous skin of macaque monkeys, it was found that this approach can mimic FA-I afferent spiking activities in terms of both the average inter-spike interval and the first spike latency. spike features of the FA-I mechanoreceptors, such as the variability, frequency dependent responses, and population activity, were also explored, which may play a vital role in the understanding of the functionality of FA-I mech- anoreceptors and the development of advanced prosthetic limbs.

关键词： bio-inspired tactile sensor FA-I mechanoreceptor spiking neuron model inter-spike interval first spike latency

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latency represents sound frequency in mouse IC

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Science China(Life Sciences) 2007年第2期50卷 258-264页

作者： QIU Qiang TANG Jie YU ZuLin ZHANG Juan ZHOU YingJie XIAO ZhongJu SHEN JunXian State Key Laboratory of Brain and Cognitive Sciences Institute of BiophysicsChinese Academy of SciencesBeijing 100101China Graduate University of Chinese Academy of Sciences Beijing 100049China Department of Physiology Southern Medicine UniversityGuangzhou 510515China

Frequency is one of the fundamental parameters of *** frequency of an acoustic stimulus can be represented by a neural response such as spike rate,and/or first spike latency(FSL)of a given *** spike rates/frequency function of most neurons changes with different acoustic ampli-tudes,whereas FSL/frequency function is highly *** implies that FSL might represent the fre-quency of a sound stimulus more efficiently than spike *** study involved representations of acoustic frequency by spike rate and FSL of central inferior colliculus(IC)neurons responding to free-field pure-tone *** found that the FSLs of neurons responding to characteristic frequency(CF)of sound stimulus were usually the shortest,regardless of sound intensity,and that spike rates of most neurons showed a variety of function according to sound frequency,especially at high *** results strongly suggest that FSL of auditory IC neurons can represent sound frequency more precisely than spike rate.

关键词： first spike latency characteristic frequency representation inferior colliculus mouse

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Temporal Integration of Sound Intensity Determines the Firing Threshold of an Inferior Collicular Neuron in Mice

Temporal Integration of Sound Intensity Determines the Firin...

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第十一次中国生物物理学术大会暨第九届全国会员代表大会

作者： Xiao Wang,Weiguo Yang,Xiaodong Tan,Zhongju Xiao Department of Physiology,School of Basic Medical Sciences,Southern Medical University,Guangzhou 510515

＜正＞Neuron discharging is thought to be triggered by a fixed threshold *** auditory system studies,however,what is the neuronal firing threshold has been debated not only in

关键词： first spike latency envelope of tone burst neuron auditory system

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Generation of temporal codes by elementary thalamocortical circuits in auditory cortex

Generation of temporal codes by elementary thalamocortical c...

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中国神经科学学会第九届全国学术会议暨第五次会员代表大会

作者： Lukas Mesik Zilkha Neurogenetic Institute Keck School of MedicineUniversity of Southern CaliforniaLos AngelesCA 90089USA

＜正＞Temporal codes in the form of relative spike latency can efficiently encode sensory *** implementation of such coding strategy requires a broad dynamic range of spike latencies in order to achieve sufficient coding capacity and *** generation of spike latency codes in the sensory pathway remains largely *** report that in individual auditory cortical neurons,spike latency codes for sound frequency cannot be simply attributed to thalamocortical relays,but are primarily generated de novo by local circuits,which fine-tune the integration time for spike generation after the arrival of thalamocortial *** tuned recurrent excitation shortens integration time selectively at the optimal frequency,while broadly tuned inhibition prolongs it preferentially at off-optimal *** push-and-pull antagonistic modulations greatly sharpen spike latency tuning and expand its dynamic ***,thalamocortical circuit-like elementary synaptic circuits can convert information spatially coded in distributions of synaptic strength into temporal codes.

关键词： auditory cortex first spike latency frequency tuning latency coding synaptic circuitry in vivo whole-cell recording

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