Ralph D. Freeman

16.9k total citations · 2 hit papers
216 papers, 13.3k citations indexed

About

Ralph D. Freeman is a scholar working on Cognitive Neuroscience, Cellular and Molecular Neuroscience and Spectroscopy. According to data from OpenAlex, Ralph D. Freeman has authored 216 papers receiving a total of 13.3k indexed citations (citations by other indexed papers that have themselves been cited), including 132 papers in Cognitive Neuroscience, 59 papers in Cellular and Molecular Neuroscience and 45 papers in Spectroscopy. Recurrent topics in Ralph D. Freeman's work include Visual perception and processing mechanisms (112 papers), Neural dynamics and brain function (81 papers) and Advanced NMR Techniques and Applications (42 papers). Ralph D. Freeman is often cited by papers focused on Visual perception and processing mechanisms (112 papers), Neural dynamics and brain function (81 papers) and Advanced NMR Techniques and Applications (42 papers). Ralph D. Freeman collaborates with scholars based in United States, United Kingdom and South Sudan. Ralph D. Freeman's co-authors include Izumi Ohzawa, Gregory C. DeAngelis, G. Sclar, Ēriks Kupče, W. A. Anderson, Matthew R. Peterson, Arthur Bradley, Akiyuki Anzai, Baowang Li and Carl R. Olson and has published in prestigious journals such as Nature, Science and Proceedings of the National Academy of Sciences.

In The Last Decade

Ralph D. Freeman

215 papers receiving 12.6k citations

Hit Papers

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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.

Stereoscopic Depth Discrimination in the Visual Cortex: Neurons Ideally Suited as Disparity Detectors

1990 549 citations Izumi Ohzawa, Ralph D. Freeman et al. profile →
Adiabatic Pulses for Wideband Inversion and Broadband Decoupling

1995 516 citations Ēriks Kupče, Ralph D. Freeman Journal of Magnetic Resonance Series A profile →

Author Peers

Peers are selected by citation overlap in the author's most active subfields. citations · hero ref

Author						Papers	Cites
Ralph D. Freeman	8.9k	3.6k	2.2k	2.0k	1.6k	216	13.3k
Peter B. Barker	4.4k 0.5×	2.0k 0.6×	2.2k 1.0×	2.8k 1.5×	8.0k 5.0×	350	18.3k
Jens Frahm	5.9k 0.7×	3.6k 1.0×	2.9k 1.3×	4.4k 2.2×	15.6k 9.8×	495	29.1k
James S. Hyde	13.2k 1.5×	1.6k 0.4×	2.6k 1.2×	3.4k 1.8×	10.4k 6.5×	356	28.7k
Gareth J. Barker	8.0k 0.9×	2.7k 0.8×	645 0.3×	2.2k 1.1×	15.5k 9.8×	454	28.6k
Keith R. Thulborn	3.4k 0.4×	713 0.2×	922 0.4×	1.2k 0.6×	3.3k 2.1×	142	9.2k
Partha P. Mitra	6.4k 0.7×	3.9k 1.1×	850 0.4×	1.4k 0.7×	2.8k 1.7×	162	16.1k
Hellmut Merkle	6.0k 0.7×	1.3k 0.4×	2.2k 1.0×	1.3k 0.6×	10.4k 6.6×	158	15.5k
Rolf Gruetter	4.2k 0.5×	4.3k 1.2×	5.2k 2.4×	3.4k 1.7×	11.9k 7.5×	395	21.0k
Peter Jezzard	8.6k 1.0×	1.5k 0.4×	776 0.4×	538 0.3×	10.9k 6.9×	220	19.7k
Lawrence L. Wald	6.0k 0.7×	1.3k 0.4×	2.5k 1.1×	614 0.3×	13.4k 8.4×	383	19.1k

Countries citing papers authored by Ralph D. Freeman

Since Specialization

Citations

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

Fields of papers citing papers by Ralph D. Freeman

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ralph D. Freeman

This figure shows the co-authorship network connecting the top 25 collaborators of Ralph D. Freeman. A scholar is included among the top collaborators of Ralph D. Freeman 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 D. Freeman. Ralph D. Freeman 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

Freeman, Ralph D.. (2017). 2015 Charles F. Prentice Medal Award Lecture: Neural Organization of Binocular Vision. Optometry and Vision Science. 94(10). 931–938. 2 indexed citations

Pasley, Brian N., Elena A. Allen, & Ralph D. Freeman. (2009). State-Dependent Variability of Neuronal Responses to Transcranial Magnetic Stimulation of the Visual Cortex. Neuron. 62(2). 291–303. 111 indexed citations

Allen, Elena A. & Ralph D. Freeman. (2006). Dynamic Spatial Processing Originates in Early Visual Pathways. Journal of Neuroscience. 26(45). 11763–11774. 43 indexed citations

Thompson, Jeffrey, Matthew R. Peterson, & Ralph D. Freeman. (2005). Separate Spatial Scales Determine Neural Activity-Dependent Changes in Tissue Oxygen within Central Visual Pathways. Journal of Neuroscience. 25(39). 9046–9058. 38 indexed citations

Peterson, Matthew, Izumi Ohzawa, & Ralph D. Freeman. (2001). Neural and perceptual adjustments to dim light. Visual Neuroscience. 18(2). 203–208. 14 indexed citations

Freeman, Ralph D.. (1999). Stereoscopic vision: Which parts of the brain are involved?. Current Biology. 9(16). R610–R613. 12 indexed citations

Freeman, Ralph D.. (1998). Binocular vision: The neural integration of depth and motion. Current Biology. 8(21). R761–R764. 2 indexed citations

Freeman, Ralph D.. (1996). Studies of functional connectivity in the developing and mature visual cortex. Journal of Physiology-Paris. 90(3-4). 199–203. 4 indexed citations

Kupče, Ēriks & Ralph D. Freeman. (1995). Band-Selective Correlation Spectroscopy. Journal of Magnetic Resonance Series A. 112(1). 134–137. 26 indexed citations

10.

Ghose, Geoffrey M., Izumi Ohzawa, & Ralph D. Freeman. (1995). A flexible PC-based physiological monitor for animal experiments. Journal of Neuroscience Methods. 62(1-2). 7–13. 13 indexed citations

11.

Kupče, Ēriks & Ralph D. Freeman. (1994). Wideband Excitation with Polychromatic Pulses. Journal of Magnetic Resonance Series A. 108(2). 268–273. 90 indexed citations

12.

Bearse, Marcus A. & Ralph D. Freeman. (1994). Binocular summation in orientation discrimination depends on stimulus contrast and duration. Vision Research. 34(1). 19–29. 46 indexed citations

13.

Ghose, Geoffrey M., Izumi Ohzawa, & Ralph D. Freeman. (1991). Pathways in the visual cortex revealed by receptive field mapping of correlated discharge. The Society for Neuroscience Abstracts. 17. 177. 2 indexed citations

14.

Freeman, Ralph D. & Izumi Ohzawa. (1990). On the neurophysiological organization of binocular vision. Vision Research. 30(11). 1661–1676. 144 indexed citations

15.

Rabin, Jeff, Arthur Bradley, & Ralph D. Freeman. (1983). On the Relation Between Aniseikonia and Axial Anisometropia. Optometry and Vision Science. 60(7). 553–558. 23 indexed citations

16.

Freeman, Ralph D.. (1980). Corneal radius of curvature of the kitten and the cat.. PubMed. 19(3). 306–8. 20 indexed citations

17.

Cohn, Theodore E., et al.. (1973). THE INFLUENCE OF BIAS UPON RETINOSCOPY. Optometry and Vision Science. 50(8). 647–652. 3 indexed citations

18.

Freeman, Ralph D.. (1966). ALIGNMENT DETECTION AND RESOLUTION AS A FUNCTION OF RETINAL LOCATION. Optometry and Vision Science. 43(12). 812–817. 4 indexed citations

19.

Ferretti, James A. & Ralph D. Freeman. (1966). Transient Nutations in Nuclear Magnetic Double Resonance. Assignment of Transitions to an Energy-Level Diagram. The Journal of Chemical Physics. 44(5). 2054–2063. 25 indexed citations

20.

Freeman, Ralph D. & D. H. Whiffen. (1961). Determination of the relative signs of proton spin coupling constants by double irradiation. Molecular Physics. 4(4). 321–325. 99 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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