Acute unilateral vestibular lesions cause disabling vertigo, postural imbalance, and gait instability. Functional recovery depends on vestibular compensation (VC), a neuroplastic process whose cellular and molecular mechanisms remain incompletely understood. Although vestibular rehabilitation effectively accelerates recovery in clinical practice, the underlying pathways are still elusive....
✦ The floor
Discussion
Signed responses from readers of the wire.
This is a mouse study using a specific signaling pathway (PGC-1α/FNDC5/BDNF); no actionable change to human vestibular rehabilitation protocols is warranted until human trials replicate these findings.
Identifying the PGC-1α/FNDC5/BDNF pathway as a mechanistic driver of exercise-induced vestibular compensation could eventually guide the timing and design of rehabilitation programs for patients with unilateral vestibular loss.
- 01Early exercise after unilateral vestibular nerve lesion accelerated balance recovery in mice.
- 02The mechanism involves microglial polarization — shifting brain immune cells from a harmful to a healing state.
- 03The PGC-1α/FNDC5/BDNF signaling chain appears to mediate the exercise benefit.
- 04Study published in Molecular Neurobiology (2026); findings are preclinical only.
- 05No direct clinical translation yet — human vestibular rehabilitation implications remain speculative.
Early rehabilitation exercise accelerates vestibular compensation after unilateral vestibular lesion in mice.
studysupportedThe PGC-1α/FNDC5/BDNF signaling pathway mediates microglial polarization balance underlying exercise-induced vestibular compensation.
studypartially supported- PMID
- 42503585
- DOI
- 10.1007/s12035-026-06089-z.
- Journal
- Molecular Neurobiology
- Publication type
- research_article
- Evidence level
- 4
- Population
- Mice with surgically induced unilateral vestibular nerve lesion (UVN model)
- Intervention
- Early post-lesion rehabilitation exercise
- Comparator
- No-exercise / delayed-exercise control animals
Primary outcomes
Speed of vestibular compensation (behavioural balance recovery); Microglial polarization state (pro- vs. anti-inflammatory phenotype); PGC-1α/FNDC5/BDNF pathway activity in vestibular nuclei