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Paper Abstract and Keywords
Presentation 2010-11-18 15:20
[Invited Talk] Cortical mechanism underlying self-initiation of voluntary movements -- A New Behavioral and Electrophysiological Approach --
Yoshikazu Isomura (Tamagawa Univ.) MBE2010-43 NC2010-56
Abstract (in Japanese) (See Japanese page) 
(in English) Neurons in the motor cortex are activated at a variety of timing during self-initiated voluntary movement. However, how excitatory and inhibitory neurons participate in organizing the voluntary movement has been poorly understood. We performed juxtacellular recording and multi-neuron recording from the motor cortex of actively behaving rats to demonstrate different functional activations of excitatory pyramidal cells and inhibitory fast-spiking (FS) interneurons. Across cortical layers, pyramidal cells were activated diversely for sequential motor phases (e.g., preparation, initiation, execution), whereas FS interneurons were recruited predominantly for motor execution. Thus, FS interneurons may underlie command shaping, rather than command gating. Furthermore, our cross-correlation analysis of multi-neuron activity suggested that some of pyramidal cells discharged synchronously with similar and different functional classes of neurons through direct (or indirect) synaptic connections.
Keyword (in Japanese) (See Japanese page) 
(in English) Operant Motor Task / Rat Motor Cortex / Multi-Neuron Recording / Juxtacellular Recording / / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 295, NC2010-56, pp. 23-25, Nov. 2010.
Paper # NC2010-56 
Date of Issue 2010-11-11 (MBE, NC) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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Conference Information
Committee MBE NC  
Conference Date 2010-11-18 - 2010-11-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) BCI/BMI, NC and MBE 
Paper Information
Registration To NC 
Conference Code 2010-11-MBE-NC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Cortical mechanism underlying self-initiation of voluntary movements 
Sub Title (in English) A New Behavioral and Electrophysiological Approach 
Keyword(1) Operant Motor Task  
Keyword(2) Rat Motor Cortex  
Keyword(3) Multi-Neuron Recording  
Keyword(4) Juxtacellular Recording  
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1st Author's Name Yoshikazu Isomura  
1st Author's Affiliation Tamagawa University (Tamagawa Univ.)
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Speaker Author-1 
Date Time 2010-11-18 15:20:00 
Presentation Time 60 minutes 
Registration for NC 
Paper # MBE2010-43, NC2010-56 
Volume (vol) vol.110 
Number (no) no.294(MBE), no.295(NC) 
Page pp.43-45(MBE), pp.23-25(NC) 
#Pages
Date of Issue 2010-11-11 (MBE, NC) 


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