Transcranial Magnetic Stimulation to Treat Neuropathic Pain: A Bibliometric Analysis

Abstract

Neuropathic pain is caused by a lesion or disease of the somatosensory system and is one of the most incapacitating pain types, representing a significant non-met medical need. Due to the increase in research in the field and since innovative therapeutic strategies are required, namely in intractable neuropathic pain, neurostimulation has been used. Within this approach, transcranial magnetic stimulation (TMS) that uses a transient magnetic field to produce electrical currents over the cortex emerges as a popular method in the literature. Since this is an area in expansion and due to the putative role of TMS, we performed a bibliometric analysis in Scopus with the primary objective of identifying the scientific production related to the use of TMS to manage neuropathic pain. The research had no restrictions, and the analysis focused on the characteristics of the literature retrieved, scientific collaboration and main research topics from inception to 6 July 2023. A total of 474 articles were collected. A biggest co-occurrence between the terms "neuropathic pain" and "transcranial magnetic stimulation" was obtained. The journal "Clinical Neurophysiology" leads the Top 5 most productive sources. The United States is the most productive country, with 50% of US documents being "review articles", followed by France, with 56% of French documents being "original articles". Lefaucheur, JP and Saitoh, Y are the two most influential authors. The most frequent type of document was "original article". Most of the studies (34%) that identified the neuropathic pain type focused on traumatic neuropathic pain, although a large proportion (38%) did not report the neuropathic pain type. This study allows us to provide a general overview of the field of TMS application for neuropathic pain and is useful for establishing future directions of research in this field.

Keywords: bibliometric analysis; neuropathic pain; pain; transcranial magnetic stimulation; treatment.

Figure 1

Co-occurrence of author or index keywords. The colors represent the clusters created based on the co-occurrence of keywords. Twenty-five was the minimum number occurrence of words.

Figure 2

Graphical representation of the evolution of obtained publications since the inception of research into the subject of neuropathic pain and TMS.

Figure 3

Graphical representation of publications by the five most productive sources.

Figure 4

Graphical representation of retrieved publications by type of study.

Figure 5

Graphical representation of Top 10 most productive countries.

Figure 6

Co-authoring clusters demonstrate the most frequent groups in publications and the relationships with other clusters. The circle’s size is proportional to the document’s number.