Can New Gene Therapy Cure Blindness?

A Head-to-Head Trial for a Physical Form of Tinnitus

A new trial is preparing to test a head-to-head comparison of two very different treatments for somatosensory tinnitus. The trial, registered as NCT07740954, will directly measure the effectiveness of manual therapy, Tinnitus Retraining Therapy (TRT), and a combination of both in 65 adults. For patients whose tinnitus changes with head or neck movements, this study could help define the best path for treatment.

Somatosensory tinnitus is a specific subtype where the perceived sound can be modulated by movements or pressure in the head, neck, or jaw. This suggests the auditory system is interacting with the somatosensory system from the cervical spine and face. While both manual therapy and TRT are used in clinics, strong evidence comparing their effectiveness for this specific condition is limited.

Three Treatment Arms in a Randomized Design

The study is a three-arm randomized controlled trial, the gold standard for comparing medical interventions. Participants will be randomly assigned to one of three parallel groups: the Manual Therapy (MT) group, the Tinnitus Retraining Therapy (TRT) group, or a Combined Therapy group receiving both treatments.

The intervention period lasts six weeks. Manual Therapy will involve hands-on techniques applied to the cervical spine and surrounding muscles. Tinnitus Retraining Therapy is a structured program combining directive counseling and sound therapy to help patients habituate to their tinnitus. The combined group will receive both approaches. Researchers will assess a wide range of outcomes before and immediately after treatment, including tinnitus severity, neck disability, cervical range of motion, pressure pain sensitivity, and measures of anxiety, depression, and quality of life.

Who Can Participate in the Trial

The trial has clear criteria to target the specific patient population it aims to study. Eligible participants must be adults between 18 and 65 years old with a diagnosis of chronic subjective somatosensory tinnitus lasting at least three months. A key requirement is that the tinnitus can be modulated by movements of the head, neck, or jaw, or by palpation of cervical muscles.

Participants must have normal middle ear function, as shown by tympanometry. The study excludes individuals with objective or pulsatile tinnitus, tinnitus lasting less than 3 months, or diagnoses of Ménière’s disease, otosclerosis, vestibular schwannoma, or other retrocochlear pathologies. Those with active middle ear disease are also excluded.

The Rationale Behind Comparing Physical and Behavioral Approaches

The study design reflects a modern understanding of somatosensory tinnitus as a condition involving cross-talk between sensory pathways. Manual Therapy addresses the potential musculoskeletal component, aiming to reduce aberrant input from the neck and jaw that may be influencing the auditory system. In contrast, Tinnitus Retraining Therapy addresses the brain’s perceptual and emotional response to the tinnitus signal, regardless of its source.

By testing these approaches separately and together, the trial can answer whether one method is superior, or if a synergistic effect exists. Measuring related factors like neck pain, pressure pain thresholds, and psychological status will provide a detailed picture of how each therapy works.

Current Trial Status and Future Impact

According to the ClinicalTrials.gov registry, the trial’s status is “NOT_YET_RECRUITING.” It aims to enroll 65 participants. The study is listed as Phase NA (Not Applicable), which is common for trials investigating established therapies in new contexts or combinations.

For the field of hearing health, the results could help move the management of somatosensory tinnitus toward more precise, evidence-based protocols. For patients, a clear comparison could reduce the trial-and-error period often involved in tinnitus care, directing them more efficiently to the most effective intervention based on their specific symptoms. The findings may also inform whether interdisciplinary collaboration between physical therapists and audiologists provides added benefit.

This article is for informational purposes only. Consult a qualified professional for personalised advice.

Source:
COMPARISON OF MANUAL THERAPY, TINNITUS RETRAINING THERAPY (ClinicalTrials.gov: NCT07740954)