Paper Abstract and Keywords |
Presentation |
2021-01-22 14:20
Contrast dependent spatial frequency tuning dynamics and its underlying neural mechanisms in the cat area 17 Kazuki Kohara, Seisiro Nitta, Hiroki Tanaka (Kyoto Sangyo Univ.) NC2020-40 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
In order to examine neural mechanisms to form spatial frequency (SF) tunings of area 17 neurons, we recorded extracellular spike activities in response to sequences of rapidly presented sinusoidal gratings of various orientation and spatial frequencies under several contrast conditions, and analyzed contrast dependence of temporal changes of SF tunings and its suppressive components. At low contrast, temporal rate of SF tuning changes is relatively low and constant throughout response period. Under high contrast condition, on the other hand, whereas the change rate is similar to that of low contrast condition at early response period, it greatly increased thereafter. The suppression is stronger as contrast is higher. The relationship between excitation and suppression at high contrast condition indicates that the suppression predominantly contributes to the temporal changes of peak SF at middle to late response period. The results indicate that both feedforward and cortical recurrent mechanisms are involved in the generation of SF tunings of cortical neurons. The cortical mechanism stabilizing network activities based on stimulus contrast may also adjust feedforward-mediated SF tunings to optimize for low SF processing at low contras and high SF processing for high contrast conditions. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Spatial frequency tuning / Area 17 / Area V1 / Cortical suppression / Stabilized supralinear network / / / |
Reference Info. |
IEICE Tech. Rep., vol. 120, no. 331, NC2020-40, pp. 45-48, Jan. 2021. |
Paper # |
NC2020-40 |
Date of Issue |
2021-01-14 (NC) |
ISSN |
Online edition: ISSN 2432-6380 |
Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
Download PDF |
NC2020-40 |
Conference Information |
Committee |
NC NLP |
Conference Date |
2021-01-21 - 2021-01-22 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Online |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
NC,NLP |
Paper Information |
Registration To |
NC |
Conference Code |
2021-01-NC-NLP |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Contrast dependent spatial frequency tuning dynamics and its underlying neural mechanisms in the cat area 17 |
Sub Title (in English) |
|
Keyword(1) |
Spatial frequency tuning |
Keyword(2) |
Area 17 |
Keyword(3) |
Area V1 |
Keyword(4) |
Cortical suppression |
Keyword(5) |
Stabilized supralinear network |
Keyword(6) |
|
Keyword(7) |
|
Keyword(8) |
|
1st Author's Name |
Kazuki Kohara |
1st Author's Affiliation |
Kyoto Sangyo University (Kyoto Sangyo Univ.) |
2nd Author's Name |
Seisiro Nitta |
2nd Author's Affiliation |
Kyoto Sangyo University (Kyoto Sangyo Univ.) |
3rd Author's Name |
Hiroki Tanaka |
3rd Author's Affiliation |
Kyoto Sangyo University (Kyoto Sangyo Univ.) |
4th Author's Name |
|
4th Author's Affiliation |
() |
5th Author's Name |
|
5th Author's Affiliation |
() |
6th Author's Name |
|
6th Author's Affiliation |
() |
7th Author's Name |
|
7th Author's Affiliation |
() |
8th Author's Name |
|
8th Author's Affiliation |
() |
9th Author's Name |
|
9th Author's Affiliation |
() |
10th Author's Name |
|
10th Author's Affiliation |
() |
11th Author's Name |
|
11th Author's Affiliation |
() |
12th Author's Name |
|
12th Author's Affiliation |
() |
13th Author's Name |
|
13th Author's Affiliation |
() |
14th Author's Name |
|
14th Author's Affiliation |
() |
15th Author's Name |
|
15th Author's Affiliation |
() |
16th Author's Name |
|
16th Author's Affiliation |
() |
17th Author's Name |
|
17th Author's Affiliation |
() |
18th Author's Name |
|
18th Author's Affiliation |
() |
19th Author's Name |
|
19th Author's Affiliation |
() |
20th Author's Name |
|
20th Author's Affiliation |
() |
Speaker |
Author-3 |
Date Time |
2021-01-22 14:20:00 |
Presentation Time |
25 minutes |
Registration for |
NC |
Paper # |
NC2020-40 |
Volume (vol) |
vol.120 |
Number (no) |
no.331 |
Page |
pp.45-48 |
#Pages |
4 |
Date of Issue |
2021-01-14 (NC) |
|