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Effects of repetitive transcranial magnetic stimulation (rTMS) on chronic tinnitus.

Abstract

CONCLUSIONS

Preliminary results indicate that repetitive transcranial magnetic stimulation (rTMS) can suppress tinnitus for some people. However, several procedural questions need to be addressed before the results of TMS studies can be interpreted or applied. For example, the placebo effect might be a significant factor because it is easy for patients to distinguish between real and sham stimulation.

OBJECTIVES

This study was undertaken to determine the following: Can rTMS reduce patients' perception of chronic tinnitus? Is ipsilateral or contralateral stimulation most effective at reducing patients' perception of tinnitus? What is the extent and duration of the change in tinnitus following rTMS?

PATIENTS AND METHODS

Fifteen subjects rated the loudness of their tinnitus on a 1-10 scale (1 = very quiet, 10 = very loud) before and after sham or real TMS. Participants wore foam ear plugs during the following procedures. After the patient's motor threshold was established, a figure-of-eight stimulating coil was positioned over the temporal region of the head at a location that corresponds to International 10-20 electrode position T3 (left) or T4 (right). 'Sham' rTMS was then delivered to this region of the head, first on the ipsilateral side, then on the contralateral side from where participants perceived tinnitus. Sham TMS consisted of an audio recording of actual TMS stimulus sounds. Actual rTMS was next delivered to each side of the head, starting with the side ipsilateral to tinnitus perception. Stimulation intensity was 100% of the resting motor threshold. A train of 30 pulses at 10 Hz was delivered every minute for 5 min.

RESULTS

Two subjects reported reductions in tinnitus loudness following sham stimulation. Actual TMS resulted in partial suppression of tinnitus for six subjects. The amount of suppression ranged from 19% to 86% (average 50%). The durations of tinnitus suppression for each of the six subjects were: 20 min, 30 min, 45 min, 60 min, and 1 and 4 days, respectively.

Authors+Show Affiliations

OHSU Tinnitus Clinic, Oregon Hearing Research Center, Department of Otolaryngology, Oregon Health & Science University, Portland, OR 97239, USA. folmerr@ohsu.eduNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Journal Article

Language

eng

PubMed ID

17114152

Citation

Folmer, Robert L., et al. "Effects of Repetitive Transcranial Magnetic Stimulation (rTMS) On Chronic Tinnitus." Acta Oto-laryngologica. Supplementum, 2006, pp. 96-101.
Folmer RL, Carroll JR, Rahim A, et al. Effects of repetitive transcranial magnetic stimulation (rTMS) on chronic tinnitus. Acta Otolaryngol Suppl. 2006.
Folmer, R. L., Carroll, J. R., Rahim, A., Shi, Y., & Hal Martin, W. (2006). Effects of repetitive transcranial magnetic stimulation (rTMS) on chronic tinnitus. Acta Oto-laryngologica. Supplementum, (556), 96-101.
Folmer RL, et al. Effects of Repetitive Transcranial Magnetic Stimulation (rTMS) On Chronic Tinnitus. Acta Otolaryngol Suppl. 2006;(556)96-101. PubMed PMID: 17114152.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of repetitive transcranial magnetic stimulation (rTMS) on chronic tinnitus. AU - Folmer,Robert L, AU - Carroll,Jennifer R, AU - Rahim,Azra, AU - Shi,Yongbing, AU - Hal Martin,William, PY - 2006/11/23/pubmed PY - 2007/5/9/medline PY - 2006/11/23/entrez SP - 96 EP - 101 JF - Acta oto-laryngologica. Supplementum JO - Acta Otolaryngol Suppl IS - 556 N2 - CONCLUSIONS: Preliminary results indicate that repetitive transcranial magnetic stimulation (rTMS) can suppress tinnitus for some people. However, several procedural questions need to be addressed before the results of TMS studies can be interpreted or applied. For example, the placebo effect might be a significant factor because it is easy for patients to distinguish between real and sham stimulation. OBJECTIVES: This study was undertaken to determine the following: Can rTMS reduce patients' perception of chronic tinnitus? Is ipsilateral or contralateral stimulation most effective at reducing patients' perception of tinnitus? What is the extent and duration of the change in tinnitus following rTMS? PATIENTS AND METHODS: Fifteen subjects rated the loudness of their tinnitus on a 1-10 scale (1 = very quiet, 10 = very loud) before and after sham or real TMS. Participants wore foam ear plugs during the following procedures. After the patient's motor threshold was established, a figure-of-eight stimulating coil was positioned over the temporal region of the head at a location that corresponds to International 10-20 electrode position T3 (left) or T4 (right). 'Sham' rTMS was then delivered to this region of the head, first on the ipsilateral side, then on the contralateral side from where participants perceived tinnitus. Sham TMS consisted of an audio recording of actual TMS stimulus sounds. Actual rTMS was next delivered to each side of the head, starting with the side ipsilateral to tinnitus perception. Stimulation intensity was 100% of the resting motor threshold. A train of 30 pulses at 10 Hz was delivered every minute for 5 min. RESULTS: Two subjects reported reductions in tinnitus loudness following sham stimulation. Actual TMS resulted in partial suppression of tinnitus for six subjects. The amount of suppression ranged from 19% to 86% (average 50%). The durations of tinnitus suppression for each of the six subjects were: 20 min, 30 min, 45 min, 60 min, and 1 and 4 days, respectively. SN - 0365-5237 UR - https://www.unboundmedicine.com/medline/citation/17114152/Effects_of_repetitive_transcranial_magnetic_stimulation__rTMS__on_chronic_tinnitus_ L2 - https://ClinicalTrials.gov/search/term=17114152 [PUBMED-IDS] DB - PRIME DP - Unbound Medicine ER -