G. Hajak

2.2k total citations
37 papers, 1.2k citations indexed

About

G. Hajak is a scholar working on Neurology, Cognitive Neuroscience and Experimental and Cognitive Psychology. According to data from OpenAlex, G. Hajak has authored 37 papers receiving a total of 1.2k indexed citations (citations by other indexed papers that have themselves been cited), including 15 papers in Neurology, 12 papers in Cognitive Neuroscience and 9 papers in Experimental and Cognitive Psychology. Recurrent topics in G. Hajak's work include Transcranial Magnetic Stimulation Studies (12 papers), Sleep and related disorders (6 papers) and Hearing, Cochlea, Tinnitus, Genetics (5 papers). G. Hajak is often cited by papers focused on Transcranial Magnetic Stimulation Studies (12 papers), Sleep and related disorders (6 papers) and Hearing, Cochlea, Tinnitus, Genetics (5 papers). G. Hajak collaborates with scholars based in Germany, Switzerland and Australia. G. Hajak's co-authors include Berthold Langguth, P. Eichhammer, Tobias Kleinjung, Arne May, Thomas Steffens, TC Britton, C. Idzikowski, Derk‐Jan Dijk, Hugh Selsick and Chris Alford and has published in prestigious journals such as American Journal of Psychiatry, Cerebral Cortex and British Journal of Pharmacology.

In The Last Decade

G. Hajak

37 papers receiving 1.2k citations

Peers

Countries citing papers authored by G. Hajak

Since Specialization

Citations

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

Fields of papers citing papers by G. Hajak

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of G. Hajak

This figure shows the co-authorship network connecting the top 25 collaborators of G. Hajak. A scholar is included among the top collaborators of G. Hajak 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 G. Hajak. G. Hajak 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

#	Work	Indexed citations
1	Effects of acupuncture needle penetration on motor system excitability 2012 ·Neurophysiologie Clinique ·Matthias Zunhammer, P. Eichhammer, Jason R. Franz, G. Hajak, V Busch	11
2	British Association for Psychopharmacology consensus statement on evidence-based treatment of insomnia, parasomnias and circadian rhythm disorders 2010 ·Journal of Psychopharmacology ·SJ Wilson, DJ NUTT, Chris Alford, S. Argyropoulos, David S. Baldwin, (unknown), TC Britton, Catherine Crowe, Derk‐Jan Dijk, Colin A. Espie, Paul Gringras, G. Hajak, C. Idzikowski, (unknown), (unknown), Hugh Selsick, Ann L. Sharpley, (unknown)	467
3	Berry anthocyanins and anthocyanidins exhibit distinct affinities for the efflux transporters BCRP and MDR1 2009 ·British Journal of Pharmacology ·Andrea Dreiseitel, B. Oosterhuis, (unknown), Peter Schreier, Anett Oehme, Sanja Locher, G. Hajak, Philipp Sand	63
4	Insomnien 2009 ·Der Nervenarzt ·Dieter Riemann, G. Hajak	2
5	Frontotemporale Demenz im Zusammenhang mit Familienanamnese Demenz und ApoE-Genotyp 2009 ·Der Nervenarzt ·(unknown), (unknown), Gerd Schmitz, G. Hajak, Hans‐Hermann Klünemann	4
6	Repetitive transcranial magnetic stimulation for the treatment of negative symptoms in residual schizophrenia: rationale and design of a sham-controlled, randomized multicenter study 2009 ·European Archives of Psychiatry and Clinical Neuroscience ·Joachim Cordes, Peter Falkai, Birgit Guse, A. Hasan, (unknown), (unknown), Georg Winterer, Wolfgang Wölwer, (unknown), (unknown), Christian Schmidt-Kraepelin, Christian Ohmann, Berthold Langguth, Michael Landgrebe, P. Eichhammer, Erica Frank, Julia Burger, G. Hajak, Marcella Rietschel, Thomas Wobrock	13
7	Modulating cerebello-thalamocortical pathways by neuronavigated cerebellar repetitive transcranial stimulation (rTMS) 2008 ·Neurophysiologie Clinique ·Berthold Langguth, P. Eichhammer, Marc Zowe, Michael Landgrebe, Harald Binder, Philipp Sand, G. Hajak	34
8	Pre-treatment anterior cingulate activity as a predictor of antidepressant response to repetitive transcranial magnetic stimulation (rTMS). 2007 ·PubMed ·Berthold Langguth, Rainer Wiegand, Alexander Kharraz, Michael Landgrebe, Jörg Marienhagen, Ulrich Frick, G. Hajak, Peter Eichhammer	55
9	TMS for treatment of chronic tinnitus — neurobiological effects 2007 ·Progress in brain research ·P. Eichhammer, Tobias Kleinjung, Michael Landgrebe, G. Hajak, Berthold Langguth	34
10	Transkranielle Magnetstimulation zur Behandlung von Tinnitus 2006 ·HNO ·Tobias Kleinjung, Thomas Steffens, J. Strutz, P. Eichhammer, G. Hajak, Berthold Langguth	7
11	Structural Brain Alterations following 5 Days of Intervention: Dynamic Aspects of Neuroplasticity 2006 ·Cerebral Cortex ·Arne May, G. Hajak, (unknown), Thomas Steffens, Berthold Langguth, Tobias Kleinjung, P. Eichhammer	253
12	High-frequency repetitive transcranial magnetic stimulation in schizophrenia: a combined treatment and neuroimaging study 2004 ·Psychological Medicine ·G. Hajak, Jörg Marienhagen, Berthold Langguth, Sabine Werner, Harald Binder, P. Eichhammer	65
13	Cortical excitability in neuroleptic-naive first-episode schizophrenic patients 2004 ·Pharmacopsychiatry ·P. Eichhammer, Berthold Langguth, Marc Zowe, G. Hajak	2
14	Sleep deprivation in depression 2002 ·Life Sciences ·P. Eichhammer, Alexander Kharraz, Rainer Wiegand, Berthold Langguth, Ulrich Frick, J. Aigner, G. Hajak	28
15	Insomnia in primary care. 2000 ·PubMed ·G. Hajak	36
16	On the Problems of Switching from Intravenous to Oral Administration in Drug Treatment of Endogenous Depression 1997 ·Pharmacopsychiatry ·L. Adler, G. Hajak, K. A. Lehmann, (unknown), Georg Hoffmann, (unknown), (unknown), Gerald Huether, E. Rüther	6
17	Schlafstörungen - Was tun, wenn Schlafmittel nicht mehr helfen? 1995 ·Fortschritte der Neurologie · Psychiatrie ·J. Staedt, (unknown), G. Hajak, (unknown), E. Rüther	3
18	Panikstörung und Agoraphobie: Was wirkt? 1995 ·Fortschritte der Neurologie · Psychiatrie ·Borwin Bandelow, (unknown), (unknown), G. Hajak, Andreas Broocks, E. Rüther	2
19	[Blood circulation and energy metabolism of the brain in healthy sleep]. 1993 ·PubMed ·G. Hajak, J. Klingelhöfer, M. Schulz-Varszegi, E. Rüther	2
20	Problems in performing a double-blind multicenter study using a hypnotic in private practice. 1992 ·PubMed ·(unknown), W. Haase, E. Rüther, P. Clarenbach, G. Hajak	2

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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