Ralph J. Greenspan

11.3k total citations · 1 hit paper
101 papers, 7.6k citations indexed

About

Ralph J. Greenspan is a scholar working on Cellular and Molecular Neuroscience, Genetics and Molecular Biology. According to data from OpenAlex, Ralph J. Greenspan has authored 101 papers receiving a total of 7.6k indexed citations (citations by other indexed papers that have themselves been cited), including 55 papers in Cellular and Molecular Neuroscience, 32 papers in Genetics and 31 papers in Molecular Biology. Recurrent topics in Ralph J. Greenspan's work include Neurobiology and Insect Physiology Research (50 papers), Insect and Arachnid Ecology and Behavior (23 papers) and Circadian rhythm and melatonin (14 papers). Ralph J. Greenspan is often cited by papers focused on Neurobiology and Insect Physiology Research (50 papers), Insect and Arachnid Ecology and Behavior (23 papers) and Circadian rhythm and melatonin (14 papers). Ralph J. Greenspan collaborates with scholars based in United States, France and United Kingdom. Ralph J. Greenspan's co-authors include Giulio Tononi, Paul J. Shaw, Jean‐François Ferveur, Bruno van Swinderen, Chiara Cirelli, Herman A. Dierick, Rozi Andretić Waldowski, Leslie C. Griffith, Douglas A. Nitz and Jeffrey C. Hall and has published in prestigious journals such as Nature, Science and Cell.

In The Last Decade

Ralph J. Greenspan

100 papers receiving 7.5k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Correlates of Sleep and Waking in Drosophila melanogaster

2000 921 citations Paul J. Shaw, Ralph J. Greenspan et al. profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Ralph J. Greenspan United States	46	4.5k	2.2k	1.8k	1.6k	1.5k	101	7.6k
Leslie C. Griffith United States	45	4.8k 1.1×	1.5k 0.6×	2.1k 1.2×	1.5k 0.9×	824 0.6×	111	6.2k
Tim Tully United States	48	6.5k 1.4×	2.3k 1.0×	3.5k 1.9×	717 0.4×	1.2k 0.8×	101	9.7k
Jay Hirsh United States	46	4.6k 1.0×	2.0k 0.9×	2.4k 1.3×	1.0k 0.6×	429 0.3×	89	6.8k
Ian A. Meinertzhagen Canada	60	6.6k 1.5×	1.5k 0.7×	4.3k 2.4×	1.4k 0.9×	653 0.4×	184	10.3k
Scott Waddell United Kingdom	42	5.3k 1.2×	2.5k 1.1×	1.3k 0.7×	784 0.5×	491 0.3×	77	6.8k
Thomas Préat France	41	4.0k 0.9×	1.7k 0.8×	1.9k 1.0×	573 0.4×	572 0.4×	96	6.0k
Roger Hardie United Kingdom	58	7.4k 1.6×	1.1k 0.5×	3.9k 2.2×	1.7k 1.1×	824 0.6×	135	10.0k
J. Douglas Armstrong United Kingdom	39	4.2k 0.9×	1.6k 0.7×	2.3k 1.3×	538 0.3×	554 0.4×	116	6.6k
William G. Quinn United States	26	4.7k 1.1×	1.6k 0.7×	2.0k 1.1×	475 0.3×	684 0.5×	35	6.1k
Kei Ito Japan	45	6.3k 1.4×	2.9k 1.3×	1.9k 1.0×	560 0.3×	540 0.4×	115	7.8k

Countries citing papers authored by Ralph J. Greenspan

Since Specialization

Citations

This map shows the geographic impact of Ralph J. Greenspan'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 Ralph J. Greenspan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ralph J. Greenspan more than expected).

Fields of papers citing papers by Ralph J. Greenspan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ralph J. Greenspan. 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 Ralph J. Greenspan. The network helps show where Ralph J. Greenspan may publish in the future.

Co-authorship network of co-authors of Ralph J. Greenspan

This figure shows the co-authorship network connecting the top 25 collaborators of Ralph J. Greenspan. A scholar is included among the top collaborators of Ralph J. Greenspan 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 Ralph J. Greenspan. Ralph J. Greenspan is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Kafashan, MohammadMehdi, Ralph J. Greenspan, Sijia Zhao, et al.. (2025). Investigating the impact of electroconvulsive therapy on brain networks and sleep: an observational study protocol. BMJ Open. 15(3). e098859–e098859. 1 indexed citations

Chen, Jen‐Yung, et al.. (2022). Differential mechanisms underlie trace and delay conditioning in Drosophila. Nature. 603(7900). 302–308. 26 indexed citations

Katsuki, Takeo, et al.. (2020). Imaging brain activity during complex social behaviors in Drosophila with Flyception2. Nature Communications. 11(1). 623–623. 15 indexed citations

Katsuki, Takeo, Logan Grosenick, Michael Broxton, et al.. (2019). Fast near-whole–brain imaging in adult Drosophila during responses to stimuli and behavior. PLoS Biology. 17(2). e2006732–e2006732. 91 indexed citations

Srinivasan, Shyam, et al.. (2018). Deep(er) Learning. Journal of Neuroscience. 38(34). 7365–7374. 6 indexed citations

Shultzaberger, Ryan K., Joseph S. Boyd, Spencer Diamond, Ralph J. Greenspan, & Susan S. Golden. (2015). Giving Time Purpose: The Synechococcus elongatus Clock in a Broader Network Context. Annual Review of Genetics. 49(1). 485–505. 26 indexed citations

Sejnowski, Terrence J., Howard Poizner, Gary Lynch, Sergei Gepshtein, & Ralph J. Greenspan. (2014). Prospective Optimization. Proceedings of the IEEE. 102(5). 799–811. 4 indexed citations

Chuang, Chao-Chun, Tzu-En Hua, Chun‐Chao Chen, et al.. (2013). A Comprehensive Wiring Diagram of the Protocerebral Bridge for Visual Information Processing in the Drosophila Brain. Cell Reports. 3(5). 1739–1753. 102 indexed citations

Katz, Paul S., Sten Grillner, Rachel I. Wilson, et al.. (2013). Vertebrate versus invertebrate neural circuits. Current Biology. 23(12). R504–R506. 8 indexed citations

10.

Flint, Jonathan, et al.. (2010). Books Received. Genetics Research. 92(3). 251–251. 1 indexed citations

11.

Greenspan, Ralph J.. (2007). Afterword Universality and Brain Mechanisms. Cold Spring Harbor Monograph Archive. 49. 647–649. 6 indexed citations

12.

Dierick, Herman A. & Ralph J. Greenspan. (2006). Molecular analysis of flies selected for aggressive behavior. Nature Genetics. 38(9). 1023–1031. 163 indexed citations

13.

Swinderen, Bruno van & Ralph J. Greenspan. (2005). Flexibility in a Gene Network Affecting a Simple Behavior in Drosophila melanogaster. Genetics. 169(4). 2151–2163. 62 indexed citations

14.

Greenspan, Ralph J. & Bruno van Swinderen. (2004). Cognitive consonance: complex brain functions in the fruit fly and its relatives. Trends in Neurosciences. 27(12). 707–711. 48 indexed citations

15.

Broughton, Susan, Toshihiro Kitamoto, & Ralph J. Greenspan. (2004). Excitatory and Inhibitory Switches for Courtship in the Brain of Drosophila melanogaster. Current Biology. 14(7). 538–547. 62 indexed citations

16.

Shaw, Paul J., et al.. (2002). Stress response genes protect against lethal effects of sleep deprivation in Drosophila. Nature. 417(6886). 287–291. 346 indexed citations

17.

White, Kevin P., et al.. (2002). Identification of genes involved in Drosophila melanogaster geotaxis, a complex behavioral trait. Nature Genetics. 31(4). 349–353. 165 indexed citations

18.

Szabó, Gábor, Zoya Katarova, Elöd Körtvely, Ralph J. Greenspan, & Zsolt Urbán. (1996). Structure and the Promoter Region of the Mouse Gene Encoding the 67-kD Form of Glutamic Acid Decarboxylase. DNA and Cell Biology. 15(12). 1081–1091. 52 indexed citations

19.

Broughton, Susan, et al.. (1996). Endogenously inhibited protein kinase C in transgenicDrosophila embryonic neuroblasts down regulates the outgrowth of type I and II processes of cultured mature neurons. Journal of Cellular Biochemistry. 60(4). 584–599. 17 indexed citations

20.

Greenspan, Ralph J., et al.. (1994). Flexibility and constraint in behavioral systems : report of te Dahlem Workshop on Flexibility and Constraint in Behavioral Systems, Berlin 1993, May 9-14. 1 indexed citations

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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