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Article ; Online: Complex field reconstruction of optical OFDM signals based on temporal transport-of-intensity equation.

Matsumoto, Masayuki

2021 Volume 29, Issue 22, Page(s) 36155–36166

Abstract: Field reconstruction of optical orthogonal frequency division multiplexing (OFDM) signals in a direct-detection (DD) receiver by using temporal transport-of-intensity equation (TIE) is studied. It is shown that in this DD field reconstruction scheme, ... ...

Abstract	Field reconstruction of optical orthogonal frequency division multiplexing (OFDM) signals in a direct-detection (DD) receiver by using temporal transport-of-intensity equation (TIE) is studied. It is shown that in this DD field reconstruction scheme, better BER performance is obtained by using the OFDM modulation than by using single carrier signals especially when low-frequency subcarriers of OFDM signals are not used. How phase errors are generated in solving the TIE is analyzed and it is shown that the process of integration with respect to time gives rise to low-frequency errors that degrade the performance. The DD phase retrieval scheme has favorable features that the solution is non-iterative and it allows using double side-band signals. Nevertheless, it is shown that the scheme has high sensitivity to electrical noise in detection and requires relatively high carrier to signal power ratio, to which further studies are expected to be devoted.
Language	English
Publishing date	2021-11-22
Publishing country	United States
Document type	Journal Article
ZDB-ID	1491859-6
ISSN	1094-4087 ; 1094-4087
ISSN (online)	1094-4087
ISSN	1094-4087
DOI	10.1364/OE.438149
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Hydrogen sulfide production in the medullary respiratory center modulates the neural circuit for respiratory pattern and rhythm generations.

Okazaki, Minako / Matsumoto, Masayuki / Koganezawa, Tadachika

Scientific reports

2023 Volume 13, Issue 1, Page(s) 20046

Abstract: Hydrogen sulfide ( ... ...

Abstract	Hydrogen sulfide (H
MeSH term(s)	Rats ; Male ; Animals ; Respiratory Center/physiology ; Hydrogen Sulfide/pharmacology ; Medulla Oblongata/physiology ; Synaptic Transmission/physiology ; Respiratory Rate ; Sulfides/pharmacology ; Enzyme Inhibitors/pharmacology
Chemical Substances	Hydrogen Sulfide (YY9FVM7NSN) ; Sulfides ; Enzyme Inhibitors
Language	English
Publishing date	2023-12-04
Publishing country	England
Document type	Journal Article
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-023-47280-9
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: [Multiple Dopamine Signals and Their Contributions to Reinforcement Learning].

Matsumoto, Masayuki

Brain and nerve = Shinkei kenkyu no shinpo

2016 Volume 68, Issue 10, Page(s) 1139–1147

Abstract: Midbrain dopamine neurons are activated by reward and sensory cue that predicts reward. Their responses resemble reward prediction error that indicates the discrepancy between obtained and expected reward values, which has been thought to play an ... ...

Abstract	Midbrain dopamine neurons are activated by reward and sensory cue that predicts reward. Their responses resemble reward prediction error that indicates the discrepancy between obtained and expected reward values, which has been thought to play an important role as a teaching signal in reinforcement learning. Indeed, pharmacological blockade of dopamine transmission interferes with reinforcement learning. Recent studies reported, however, that not all dopamine neurons transmit the reward-related signal. They found that a subset of dopamine neurons transmits signals related to non-rewarding, salient experiences such as aversive stimulations and cognitively demanding events. How these signals contribute to animal behavior is not yet well understood. This article reviews recent findings on dopamine signals related to rewarding and non-rewarding experiences, and discusses their contributions to reinforcement learning.
MeSH term(s)	Animals ; Behavior, Addictive ; Dopamine/metabolism ; Dopaminergic Neurons/metabolism ; Humans ; Learning ; Reward
Chemical Substances	Dopamine (VTD58H1Z2X)
Language	Japanese
Publishing date	2016-10
Publishing country	Japan
Document type	Journal Article
ZDB-ID	390389-8
ISSN	1344-8129 ; 1881-6096 ; 0006-8969
ISSN (online)	1344-8129
ISSN	1881-6096 ; 0006-8969
DOI	10.11477/mf.1416200567
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.A 398: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (1.OG)
ab Jg. 2022: Lesesaal (EG)

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Article ; Online: A Noninvasive Method for Monitoring Breathing Patterns in Nonhuman Primates Using a Nasal Thermosensor.

Kunimatsu, Jun / Akiyama, Yusuke / Toyoshima, Osamu / Matsumoto, Masayuki

eNeuro

2022 Volume 9, Issue 6

Abstract: Respiration is strongly linked to internal states such as arousal, emotion, and even cognitive processes and provides objective biological information to estimate these states in humans and animals. However, the measurement of respiration has not been ... ...

Abstract	Respiration is strongly linked to internal states such as arousal, emotion, and even cognitive processes and provides objective biological information to estimate these states in humans and animals. However, the measurement of respiration has not been established in macaque monkeys, which have been widely used as model animals for understanding various higher brain functions. In the present study, we developed a method to monitor the respiration of behaving monkeys. We first measured the temperature of their nasal breathing, which changes between inspiration and expiration phases, in an anesthetized condition and estimated the respiration pattern. We compared the estimated pattern with that obtained by a conventional chest band method that has been used in humans and applied to anesthetized, but not behaving, monkeys. These respiration patterns matched well, suggesting that the measurement of nasal air temperature can be used to monitor the respiration of monkeys. Furthermore, we confirmed that the respiration frequency in behaving monkeys monitored by the measurement of nasal air temperature was not affected by the orofacial movement of licking to obtain the liquid reward. We next examined the frequency of respiration when they listened to music or white noise. The respiratory frequency was higher when the monkeys listened to music than the noise. This result is consistent with a phenomenon in humans and indicates the accuracy of our monitoring method. These data suggest that the measurement of nasal air temperature enables us to monitor the respiration of behaving monkeys and thereby estimate their internal states.
MeSH term(s)	Animals ; Humans ; Respiration ; Respiratory Rate ; Music ; Auditory Perception ; Macaca
Language	English
Publishing date	2022-11-29
Publishing country	United States
Document type	Journal Article
ZDB-ID	2800598-3
ISSN	2373-2822 ; 2373-2822
ISSN (online)	2373-2822
ISSN	2373-2822
DOI	10.1523/ENEURO.0352-22.2022
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Dopamine signals and physiological origin of cognitive dysfunction in Parkinson's disease.

Matsumoto, Masayuki

Movement disorders : official journal of the Movement Disorder Society

2015 Volume 30, Issue 4, Page(s) 472–483

Abstract: The pathological hallmark of Parkinson's disease (PD) is the degeneration of midbrain dopamine neurons. Cognitive dysfunction is a feature of PD patients even at the early stages of the disease. Electrophysiological studies on dopamine neurons in awake ... ...

Abstract	The pathological hallmark of Parkinson's disease (PD) is the degeneration of midbrain dopamine neurons. Cognitive dysfunction is a feature of PD patients even at the early stages of the disease. Electrophysiological studies on dopamine neurons in awake animals provide contradictory accounts of the role of dopamine. These studies have established that dopamine neurons convey a unique signal associated with rewards rather than cognitive functions. Emphasizing their role in reward processing leads to difficulty in developing hypothesis as to how cognitive impairments in PD are associated with the degeneration of dopamine circuitry. A hint to resolve this contradiction came from recent electrophysiological studies reporting that dopamine neurons transmit more diverse signals than previously thought. These studies suggest that dopamine neurons are divided into at least two functional subgroups, one signaling "motivational value" and the other signaling "salience." The former subgroup fits well with the conventional reward theory, whereas the latter subgroup has been shown to transmit signals related to salient but non-rewarding experiences such as aversive stimulations and cognitively demanding situations. This article reviews recent advances in understanding the non-reward functions of dopamine, and then discusses the possibility that cognitive dysfunction in PD is at least partially caused by the degeneration of the dopamine neuron subgroup signaling the salience of events in the environment.
MeSH term(s)	Animals ; Cognition Disorders/etiology ; Dopamine/metabolism ; Humans ; Parkinson Disease/complications ; Signal Transduction/physiology
Chemical Substances	Dopamine (VTD58H1Z2X)
Language	English
Publishing date	2015-04
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Review
ZDB-ID	607633-6
ISSN	1531-8257 ; 0885-3185
ISSN (online)	1531-8257
ISSN	0885-3185
DOI	10.1002/mds.26177
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.A 2555: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular Jg. 1995 - 2021: Lesesall (2.OG) ab Jg. 2022: Lesesaal (EG)
Zs.MO 238: Show issues

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Article ; Online: A neuronal prospect theory model in the brain reward circuitry.

Imaizumi, Yuri / Tymula, Agnieszka / Tsubo, Yasuhiro / Matsumoto, Masayuki / Yamada, Hiroshi

Nature communications

2022 Volume 13, Issue 1, Page(s) 5855

Abstract: Prospect theory, arguably the most prominent theory of choice, is an obvious candidate for neural valuation models. How the activity of individual neurons, a possible computational unit, obeys prospect theory remains unknown. Here, we show, with ... ...

Abstract	Prospect theory, arguably the most prominent theory of choice, is an obvious candidate for neural valuation models. How the activity of individual neurons, a possible computational unit, obeys prospect theory remains unknown. Here, we show, with theoretical accuracy equivalent to that of human neuroimaging studies, that single-neuron activity in four core reward-related cortical and subcortical regions represents the subjective valuation of risky gambles in monkeys. The activity of individual neurons in monkeys passively viewing a lottery reflects the desirability of probabilistic rewards parameterized as a multiplicative combination of utility and probability weighting functions, as in the prospect theory framework. The diverse patterns of valuation signals were not localized but distributed throughout most parts of the reward circuitry. A network model aggregating these signals reconstructed the risk preferences and subjective probability weighting revealed by the animals' choices. Thus, distributed neural coding explains the computation of subjective valuations under risk.
MeSH term(s)	Animals ; Brain/diagnostic imaging ; Choice Behavior/physiology ; Decision Making/physiology ; Humans ; Neurons/physiology ; Reward ; Risk-Taking
Language	English
Publishing date	2022-10-04
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2553671-0
ISSN	2041-1723 ; 2041-1723
ISSN (online)	2041-1723
ISSN	2041-1723
DOI	10.1038/s41467-022-33579-0
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Single-unit Recording in Awake Behaving Non-human Primates.

Yun, Mengxi / Nejime, Masafumi / Matsumoto, Masayuki

Bio-protocol

2021 Volume 11, Issue 8, Page(s) e3987

Abstract: Non-human primates (NHPs) have been widely used as a species model in studies to understand higher brain functions in health and disease. These studies employ specifically designed behavioral tasks in which animal behavior is well-controlled, and record ... ...

Abstract	Non-human primates (NHPs) have been widely used as a species model in studies to understand higher brain functions in health and disease. These studies employ specifically designed behavioral tasks in which animal behavior is well-controlled, and record neuronal activity at high spatial and temporal resolutions while animals are performing the tasks. Here, we present a detailed procedure to conduct single-unit recording, which fulfils high spatial and temporal resolutions while macaque monkeys (
Language	English
Publishing date	2021-04-20
Publishing country	United States
Document type	Journal Article
ZDB-ID	2833269-6
ISSN	2331-8325 ; 2331-8325
ISSN (online)	2331-8325
ISSN	2331-8325
DOI	10.21769/BioProtoc.3987
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Information-rate analysis of a fiber-optic transmission system including 2R signal regenerators.

Matsumoto, Masayuki

Optics express

2013 Volume 21, Issue 22, Page(s) 26762–26773

Abstract: Performance of a single-channel fiber-optic transmission system in which signal regenerators are periodically inserted is analyzed in terms of information rate (IR) considering channel memory. Limitations in using regenerators in a system having non-zero ...

Abstract	Performance of a single-channel fiber-optic transmission system in which signal regenerators are periodically inserted is analyzed in terms of information rate (IR) considering channel memory. Limitations in using regenerators in a system having non-zero residual dispersion between the regenerators are discussed. It is shown that a type of signal impairment caused by the interaction between the transmission-fiber dispersion and the regenerator nonlinearity is pattern-dependent and will be mitigated by the use of sequence estimation after detection at the receiver.
Language	English
Publishing date	2013-11-04
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1491859-6
ISSN	1094-4087 ; 1094-4087
ISSN (online)	1094-4087
ISSN	1094-4087
DOI	10.1364/OE.21.026762
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Article ; Online: Dynamic prospect theory: Two core decision theories coexist in the gambling behavior of monkeys and humans.

Tymula, Agnieszka / Wang, Xueting / Imaizumi, Yuri / Kawai, Takashi / Kunimatsu, Jun / Matsumoto, Masayuki / Yamada, Hiroshi

Science advances

2023 Volume 9, Issue 20, Page(s) eade7972

Abstract: Research in the multidisciplinary field of neuroeconomics has mainly been driven by two influential theories regarding human economic choice: prospect theory, which describes decision-making under risk, and reinforcement learning theory, which describes ... ...

Abstract	Research in the multidisciplinary field of neuroeconomics has mainly been driven by two influential theories regarding human economic choice: prospect theory, which describes decision-making under risk, and reinforcement learning theory, which describes learning for decision-making. We hypothesized that these two distinct theories guide decision-making in a comprehensive manner. Here, we propose and test a decision-making theory under uncertainty that combines these highly influential theories. Collecting many gambling decisions from laboratory monkeys allowed for reliable testing of our model and revealed a systematic violation of prospect theory's assumption that probability weighting is static. Using the same experimental paradigm in humans, substantial similarities between these species were uncovered by various econometric analyses of our dynamic prospect theory model, which incorporates decision-by-decision learning dynamics of prediction errors into static prospect theory. Our model provides a unified theoretical framework for exploring a neurobiological model of economic choice in human and nonhuman primates.
MeSH term(s)	Animals ; Humans ; Gambling ; Decision Making ; Haplorhini ; Learning ; Decision Theory
Language	English
Publishing date	2023-05-19
Publishing country	United States
Document type	Journal Article
ZDB-ID	2810933-8
ISSN	2375-2548 ; 2375-2548
ISSN (online)	2375-2548
ISSN	2375-2548
DOI	10.1126/sciadv.ade7972
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Nonhuman Primate Optogenetics: Current Status and Future Prospects.

Inoue, Ken-Ichi / Matsumoto, Masayuki / Takada, Masahiko

Advances in experimental medicine and biology

2021 Volume 1293, Page(s) 345–358

Abstract: Nonhuman primates (NHPs) have widely and crucially been utilized as model animals for understanding various higher brain functions and neurological disorders since their behavioral actions mimic both normal and disease states in humans. To know about how ...

Abstract	Nonhuman primates (NHPs) have widely and crucially been utilized as model animals for understanding various higher brain functions and neurological disorders since their behavioral actions mimic both normal and disease states in humans. To know about how such behaviors emerge from the functions and dysfunctions of complex neural networks, it is essential to define the role of a particular pathway or neuron-type constituting these networks. Optogenetics is a potential technique that enables analyses of network functions. However, because of the large size of the NHP brain and the difficulty in creating genetically modified animal models, this technique is currently still hard to apply effectively and efficiently to NHP neuroscience. In this article, we focus on the issues that should be overcome for the development of NHP optogenetics, with special reference to the gene introduction strategy. We review the recent breakthroughs that have been made in NHP optogenetics to address these issues and discuss future prospects regarding more effective and efficient approaches to successful optogenetic manipulation in NHPs.
MeSH term(s)	Animals ; Brain ; Neurons ; Neurosciences ; Optogenetics ; Primates
Language	English
Publishing date	2021-01-04
Publishing country	United States
Document type	Journal Article ; Review
ISSN	2214-8019 ; 0065-2598
ISSN (online)	2214-8019
ISSN	0065-2598
DOI	10.1007/978-981-15-8763-4_22
Database	MEDical Literature Analysis and Retrieval System OnLINE

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