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Master's Dissertation
DOI
10.11606/D.76.2006.tde-29032007-105503
Document
Author
Full name
Lirio Onofre Baptista de Almeida
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2006
Supervisor
Committee
Slaets, Jan Frans Willem (President)
Gonzaga, Adilson
Guido, Rodrigo Capobianco
Title in Portuguese
Desenvolvimento de instrumentação eletrônica para estudos de codificações neurais no duto óptico em moscas
Keywords in Portuguese
Instrumentação eletrônica
Neurobiofísica
Sistemas operacionais de tempo real
Abstract in Portuguese
Este trabalho descreve o projeto e a implementação de instrumentação eletrônica dedicada para neurobiofísica, com foco para pesquisas em codificação neural com invertebrados. Foram desenvolvidos sistemas de tempo real, controlados por computador, para a aquisição de tempos de disparo de spikes neurais oriundos de neurônios do cérebro de moscas, e para a geração de sinais de controle de estímulos visuais gerados a uma taxa de varredura vertical de 500Hz, usado para estimulações visuais em invertebrados. Estes sistemas possuem hardware dedicado, incluindo front end analógico, hardware digital baseado em FPGAs, hospedado em microcomputador IBM/PC compatível, que prove a interface do sistema com o usuário. Dois protótipos foram construídos, sendo o primeiro com ênfase em hardware dedicado, e o segundo com ênfase em sistema operacional de tempo real para controle do hospedeiro. Ambos sistemas estão sendo utilizados no laboratório Dipteralab do IFSC, para o estudo da transmissão da informação no duto óptico da mosca
Title in English
Development of electronic instrumentation for neural coding research in the optical flow of the fly
Keywords in English
Electronic instrumentation Real time operational systems
Neurobiophysics
Abstract in English
This work describes the project and implementation of custom build electronic instrumentation to be used in neurobiophysical research, more precisely in neural coding experiments with invertebrates. A hard real time computer controlled integrated system was developed capable to acquire the timestamps of evoked neural spikes of a fly submitted to visual stimuli. The visual stimuli generator is a custom build system connected to the hard real time computer capable to generate images at a frame rate of 500Hz. Dedicated hardware was developed, including an analog front end and FPGA based digital circuits. The IBM/PC compatible computer hosted hardware provides the system interface with the end user. Two prototypes were build, one based on dedicated hardware and the other based on real time routines executed on the host computer. Both systems are in use at the Dipteralab of our institute to study the information transmission of the optic flow signal in fly.
 
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diss_lirio.pdf (4.57 Mbytes)
Publishing Date
2007-04-09
 
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