Timo Leppänen

2.2k total citations
104 papers, 1.5k citations indexed

About

Timo Leppänen is a scholar working on Physiology, Endocrine and Autonomic Systems and Pulmonary and Respiratory Medicine. According to data from OpenAlex, Timo Leppänen has authored 104 papers receiving a total of 1.5k indexed citations (citations by other indexed papers that have themselves been cited), including 91 papers in Physiology, 62 papers in Endocrine and Autonomic Systems and 32 papers in Pulmonary and Respiratory Medicine. Recurrent topics in Timo Leppänen's work include Obstructive Sleep Apnea Research (89 papers), Neuroscience of respiration and sleep (62 papers) and Sleep and Wakefulness Research (26 papers). Timo Leppänen is often cited by papers focused on Obstructive Sleep Apnea Research (89 papers), Neuroscience of respiration and sleep (62 papers) and Sleep and Wakefulness Research (26 papers). Timo Leppänen collaborates with scholars based in Finland, Australia and Iceland. Timo Leppänen's co-authors include Juha Töyräs, Henri Korkalainen, Sami Myllymaa, Antti Kulkas, Brett Duce, Sami Nikkonen, Samu Kainulainen, Arie Oksenberg, Akseli Leino and Esa Mervaala and has published in prestigious journals such as SHILAP Revista de lepidopterología, PLoS ONE and Scientific Reports.

In The Last Decade

Timo Leppänen

98 papers receiving 1.5k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Timo Leppänen Finland 22 1.1k 673 495 346 329 104 1.5k
Gonzalo C. Gutiérrez‐Tobal Spain 21 885 0.8× 515 0.8× 261 0.5× 275 0.8× 141 0.4× 77 1.2k
Henri Korkalainen Finland 15 541 0.5× 276 0.4× 306 0.6× 120 0.3× 218 0.7× 43 751
Samu Kainulainen Finland 14 503 0.5× 248 0.4× 301 0.6× 96 0.3× 186 0.6× 51 769
Fernando Vaquerizo-Villar Spain 15 423 0.4× 214 0.3× 194 0.4× 105 0.3× 86 0.3× 44 651
Pedro Fonseca Netherlands 24 673 0.6× 195 0.3× 859 1.7× 90 0.3× 472 1.4× 95 1.7k
Clemens Heiser Germany 28 2.0k 1.9× 1.4k 2.1× 471 1.0× 487 1.4× 134 0.4× 135 2.3k
Merel M. van Gilst Netherlands 18 307 0.3× 141 0.2× 358 0.7× 40 0.1× 274 0.8× 58 763
Jan Bukartyk United States 14 221 0.2× 156 0.2× 190 0.4× 104 0.3× 248 0.8× 24 766
Balaji Goparaju United States 12 331 0.3× 121 0.2× 463 0.9× 41 0.1× 272 0.8× 15 695
Djordje Popovic United States 12 229 0.2× 130 0.2× 256 0.5× 74 0.2× 145 0.4× 18 555

Countries citing papers authored by Timo Leppänen

Since Specialization
Citations

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

Fields of papers citing papers by Timo Leppänen

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Timo Leppänen. 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 Timo Leppänen. The network helps show where Timo Leppänen may publish in the future.

Co-authorship network of co-authors of Timo Leppänen

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

All Works

20 of 20 papers shown
1.
Thorisdottir, Kristin, Harald Hrubos‐Strøm, Sami Nikkonen, et al.. (2024). Verbal memory is linked to average oxygen saturation during sleep, not the apnea-hypopnea index nor novel hypoxic load variables. Sleep Medicine. 123. 29–36. 3 indexed citations
2.
Leppänen, Timo, et al.. (2024). Variation in the Photoplethysmogram Response to Arousal From Sleep Depending on the Cause of Arousal and the Presence of Desaturation. IEEE Journal of Translational Engineering in Health and Medicine. 12. 328–339.
3.
Nath, Rajdeep Kumar, Sami Nikkonen, Samu Kainulainen, et al.. (2024). Temporal and sleep stage‐dependent agreement in manual scoring of respiratory events. Journal of Sleep Research. 34(3). e14391–e14391. 1 indexed citations
4.
Hrubos‐Strøm, Harald, et al.. (2024). A comparative analysis of unsupervised machine‐learning methods in PSG‐related phenotyping. Journal of Sleep Research. 34(3). e14349–e14349. 2 indexed citations
5.
Korkalainen, Henri, Erna Sif Arnardóttir, Anna Sigríður Íslind, et al.. (2024). Prolonged lung-to-finger circulation time indicates an increased risk of intermittent hypoxaemia in sleep apnoea patients. ERJ Open Research. 10(4). 1051–2023.
6.
Korkalainen, Henri, et al.. (2023). Reaction time in psychomotor vigilance task is related to hypoxic load in males with sleep apnea. Journal of Sleep Research. 33(2). e13988–e13988. 3 indexed citations
7.
Leppänen, Timo, et al.. (2023). Utilizing Envelope Analysis of a Nasal Pressure Signal for Sleep Apnea Severity Estimation. Diagnostics. 13(10). 1776–1776. 3 indexed citations
8.
Nath, Rajdeep Kumar, Henri Korkalainen, Sami Nikkonen, et al.. (2023). Respiratory event index underestimates severity of sleep apnea compared to apnea-hypopnea index. SLEEP Advances. 5(1). zpad054–zpad054. 4 indexed citations
9.
Bailón, Raquel, Thomas Penzel, Juha Töyräs, et al.. (2022). Obstructive sleep apnoea-related respiratory events and desaturation severity are associated with the cardiac response. ERJ Open Research. 8(4). 121–2022. 9 indexed citations
10.
Leino, Akseli, Henri Korkalainen, Sami Nikkonen, et al.. (2022). Deep Learning Enables Accurate Automatic Sleep Staging Based on Ambulatory Forehead EEG. IEEE Access. 10. 26554–26566. 14 indexed citations
11.
Leppänen, Timo, et al.. (2022). ABOSA – Freely available automatic blood oxygen saturation signal analysis software: Structure and validation. Computer Methods and Programs in Biomedicine. 226. 107120–107120. 10 indexed citations
12.
Myllymaa, Sami, Sami Nikkonen, Diego R. Mazzotti, et al.. (2021). Diabetes and cardiovascular diseases are associated with the worsening of intermittent hypoxaemia. Journal of Sleep Research. 31(1). e13441–e13441. 8 indexed citations
13.
Huttunen, R., Timo Leppänen, Brett Duce, et al.. (2021). Assessment of obstructive sleep apnea-related sleep fragmentation utilizing deep learning-based sleep staging from photoplethysmography. SLEEP. 44(10). 37 indexed citations
14.
Myllymaa, Sami, et al.. (2021). An In-Laboratory Comparison of FocusBand EEG Device and Textile Electrodes Against a Medical-Grade System and Wet Gel Electrodes. IEEE Access. 9. 132580–132591. 3 indexed citations
15.
16.
Kainulainen, Samu, Brett Duce, Henri Korkalainen, et al.. (2020). Increased nocturnal arterial pulsation frequencies of obstructive sleep apnoea patients is associated with an increased number of lapses in a psychomotor vigilance task. ERJ Open Research. 6(4). 277–2020. 4 indexed citations
17.
Korkalainen, Henri, Timo Leppänen, Brett Duce, et al.. (2020). Detailed Assessment of Sleep Architecture With Deep Learning and Shorter Epoch-to-Epoch Duration Reveals Sleep Fragmentation of Patients With Obstructive Sleep Apnea. IEEE Journal of Biomedical and Health Informatics. 25(7). 2567–2574. 25 indexed citations
18.
Leppänen, Timo, Antti Kulkas, Arie Oksenberg, et al.. (2018). Differences in arousal probability and duration after apnea and hypopnea events in adult obstructive sleep apnea patients. Physiological Measurement. 39(11). 114004–114004. 21 indexed citations
19.
Leppänen, Timo, Antti Kulkas, Brett Duce, Esa Mervaala, & Juha Töyräs. (2016). Severity of individual obstruction events is gender dependent in sleep apnea. Sleep And Breathing. 21(2). 397–404. 32 indexed citations
20.
Leppänen, Timo, Juha Töyräs, Anu Muraja‐Murro, et al.. (2016). Length of Individual Apnea Events Is Increased by Supine Position and Modulated by Severity of Obstructive Sleep Apnea. SHILAP Revista de lepidopterología. 2016. 1–13. 31 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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