Masahiko Hiroki

563 total citations
15 papers, 414 citations indexed

About

Masahiko Hiroki is a scholar working on Cognitive Neuroscience, Neurology and Epidemiology. According to data from OpenAlex, Masahiko Hiroki has authored 15 papers receiving a total of 414 indexed citations (citations by other indexed papers that have themselves been cited), including 6 papers in Cognitive Neuroscience, 4 papers in Neurology and 4 papers in Epidemiology. Recurrent topics in Masahiko Hiroki's work include Acute Ischemic Stroke Management (4 papers), Sleep and Wakefulness Research (4 papers) and Sleep and related disorders (3 papers). Masahiko Hiroki is often cited by papers focused on Acute Ischemic Stroke Management (4 papers), Sleep and Wakefulness Research (4 papers) and Sleep and related disorders (3 papers). Masahiko Hiroki collaborates with scholars based in Japan and United States. Masahiko Hiroki's co-authors include Kotaro Miyashita, Masaya Oda, Takeshi Uema, Yutaka Takayama, Kenichi Ogawa, Masami Nishikawa, Hiroshi Matsuda, Masaaki Kato, Kiyohisa Takahashi and Naofumi Kajimura and has published in prestigious journals such as Journal of Neuroscience, American Journal of Psychiatry and Neurology.

In The Last Decade

Masahiko Hiroki

14 papers receiving 407 citations

Peers

Countries citing papers authored by Masahiko Hiroki

Since Specialization

Citations

This map shows the geographic impact of Masahiko Hiroki's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Masahiko Hiroki with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Masahiko Hiroki more than expected).

Fields of papers citing papers by Masahiko Hiroki

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Masahiko Hiroki. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Masahiko Hiroki. The network helps show where Masahiko Hiroki may publish in the future.

Co-authorship network of co-authors of Masahiko Hiroki

This figure shows the co-authorship network connecting the top 25 collaborators of Masahiko Hiroki. A scholar is included among the top collaborators of Masahiko Hiroki based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Masahiko Hiroki. Masahiko Hiroki is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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15 of 15 papers shown

#	Work	Indexed citations
1	Update: mobile stroke unit and its on-board diagnostic imaging 2023 ·Nosotchu ·Masahiko Hiroki, Yutaka Kohno, Masaki Misawa	0
2	fMRI Using GRAPPA EPI with High Spatial Resolution Improves BOLD Signal Detection at 3T 2009 ·Dionyssios Mintzopoulos, Loukas G. Astrakas, Masahiko Hiroki, Azadeh Khanicheh, Lawrence L. Wald, Bruce R. Rosen, A. Aria Tzika	4
3	Effect of Benzodiazepine Hypnotic Triazolam on Relationship of Blood Pressure and Paco₂to Cerebral Blood Flow During Human Non-Rapid Eye Movement Sleep 2005 ·Journal of Neurophysiology ·Masahiko Hiroki, Naofumi Kajimura, Takeshi Uema, Kenichi Ogawa, Masami Nishikawa, Masaaki Kato, Tsuyoshi Watanabe, Toru Nakajima, Harumasa Takano, Etsuko Imabayashi, Takashi Ohnishi, Yutaka Takayama, Hiroshi Matsuda, Makoto Uchiyama, Masako Okawa, Kiyohisa Takahashi, Hidenao Fukuyama	1
4	Cerebral white matter blood flow is constant during human non-rapid eye movement sleep: a positron emission tomographic study 2004 ·Journal of Applied Physiology ·Masahiko Hiroki, Takeshi Uema, Naofumi Kajimura, Kenichi Ogawa, Masami Nishikawa, Masaaki Kato, Tsuyoshi Watanabe, Toru Nakajima, Harumasa Takano, Etsuko Imabayashi, Takashi Ohnishi, Yutaka Takayama, Hiroshi Matsuda, Makoto Uchiyama, Masako Okawa, Kiyohisa Takahashi, Hidenao Fukuyama	12
5	Deactivation by Benzodiazepine of the Basal Forebrain and Amygdala in Normal Humans During Sleep: A Placebo-Controlled [¹⁵O]H₂O PET Study 2004 ·American Journal of Psychiatry ·Naofumi Kajimura, Masami Nishikawa, Makoto Uchiyama, Masaaki Kato, Tsuyoshi Watanabe, Toru Nakajima, Tôru Hori, Tetsuo Nakabayashi, Masanori Sekimoto, Kenichi Ogawa, Harumasa Takano, Etsuko Imabayashi, Masahiko Hiroki, Takashi Onishi, Takeshi Uema, Yutaka Takayama, Hiroshi Matsuda, Masako Okawa, Kiyohisa Takahashi	23
6	Link between Linear Hyperintensity Objects in Cerebral White Matter and Hypertensive Intracerebral Hemorrhage 2004 ·Cerebrovascular Diseases ·Masahiko Hiroki, Kotaro Miyashita, Hiroshi Oe, Shigetoshi Takaya, Shunsaku Hirai, Hidenao Fukuyama	6
7	Neural Mechanism of Propofol Anesthesia in Severe Depression 2003 ·Anesthesiology ·Kenichi Ogawa, Takeshi Uema, Nobutaka Motohashi, Masami Nishikawa, Harumasa Takano, Masahiko Hiroki, Etsuko Imabayashi, Takashi Ohnishi, Tomio Inoue, Yutaka Takayama, Masatoshi Takeda, Hiroshi Matsuda, Tomio Andoh, Yoshitsugu Yamada	10
8	Central Retinal Artery Doppler Flow Parameters Reflect the Severity of Cerebral Small-Vessel Disease 2003 ·Stroke ·Masahiko Hiroki, Kotaro Miyashita, Hiroshi Yoshida, Shunsaku Hirai, Hidenao Fukuyama	17
9	Tortuosity of the White Matter Medullary Arterioles Is Related to the Severity of Hypertension 2002 ·Cerebrovascular Diseases ·Masahiko Hiroki, Kotaro Miyashita, Masaya Oda	139
10	Functional neuroanatomy of human non-rapid eye movement sleep: a study using a positron emission tomography 2002 ·International Congress Series ·Naofumi Kajimura, Makoto Uchiyama, Yutaka Takayama, Sunao Uchida, Takeshi Uema, Masaaki Kato, Masanori Sekimoto, Tsuyoshi Watanabe, Toru Nakajima, Satoru Horikoshi, Kenichi Ogawa, Masami Nishikawa, Masahiko Hiroki, Yoshihisa Kudo, Hiroshi Matsuda, Masako Okawa, Kiyohisa Takahashi	1
11	Linear Hyperintensity Objects on Magnetic Resonance Imaging Related to Hypertension 2001 ·Cerebrovascular Diseases ·Masahiko Hiroki, Kotaro Miyashita	18
12	Alternating Paroxysmal Hemiballism-Hemichorea in Bilateral Internal Carotid Artery Stenosis. 2001 ·Internal Medicine ·Toshio Shimizu, Masahiko Hiroki, Yumiko Yamaoka, Shuichi Kato, (unknown), (unknown), Akira Yagishita, Shunsaku Hirai	20
13	Unilateral spatial neglect in AD 2000 ·Neurology ·Sumio Ishiai, (unknown), (unknown), Satoshi Orimo, Nobuyuki Sodeyama, (unknown), (unknown), M Takahashi, S Watabiki, Ryoichi Okiyama, Takayasu Ohtake, Masahiko Hiroki	32
14	Activity of Midbrain Reticular Formation and Neocortex during the Progression of Human Non-Rapid Eye Movement Sleep 1999 ·Journal of Neuroscience ·Naofumi Kajimura, Makoto Uchiyama, Yutaka Takayama, Sunao Uchida, Takeshi Uema, Masaaki Kato, Masanori Sekimoto, Tsuyoshi Watanabe, Toru Nakajima, Satoru Horikoshi, Kenichi Ogawa, Masami Nishikawa, Masahiko Hiroki, Yoshihisa Kudo, Hiroshi Matsuda, Masako Okawa, Kiyohisa Takahashi	120
15	Accelerated brain infarction in hypertension complicated by hereditary heterozygous protein C deficiency. 1993 ·Stroke ·Seiji Kazui, Yoshihiro Kuriyama, Toshiyuki Sakata, Masahiko Hiroki, Kotaro Miyashita, Tohru Sawada	11

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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