Journal article
Reduced cerebellar brain inhibition measured using dual-site TMS in older than in younger adults
The Cerebellum
2021
Abstract
Dual-site transcranial magnetic stimulation (TMS) can be used to measure the cerebellar inhibitory influence on the primary motor cortex, known as cerebellar brain inhibition (CBI), which is thought to be important for motor control. The aim of this study was to determine whether age-related differences in CBI (measured at rest) were associated with an age-related decline in bilateral motor control measured using the Purdue Pegboard task, the Four Square Step Test, and a 10-m walk. In addition, we examined test re-test reliability of CBI measured using dual-site TMS with a figure-of-eight coil in two sessions. There were three novel findings. First, CBI was less in older than in younger adults, which is likely underpinned by an age-related loss of Purkinje cells. Second, greater CBI was associated with faster 10-m walking performance in older adults, but slower 10-m walking performance in younger adults. Third, moderate intraclass correlation coefficients (ICCs: 0.53) were found for CBI in younger adults; poor ICCs were found for CBI (ICC: 0.40) in older adults. Together, these results have important implications for the use of dual-site TMS to increase our understanding of age- and disease-related changes in cortical motor networks, and the role of functional connectivity in motor control.
Details
- Title
- Reduced cerebellar brain inhibition measured using dual-site TMS in older than in younger adults
- Authors/Creators
- B.K. Rurak (Author/Creator) - Murdoch UniversityJ.P. Rodrigues (Author/Creator) - Hollywood Private HospitalB.D. Power (Author/Creator) - Hollywood Private HospitalP.D. Drummond (Author/Creator) - Murdoch UniversityA.M. Vallence (Author/Creator) - Murdoch University
- Publication Details
- The Cerebellum
- Publisher
- Springer Nature
- Identifiers
- 991005542296907891
- Copyright
- © 2021 Springer Nature Switzerland AG.
- Murdoch Affiliation
- School of Allied Health; Health Futures Institute; Centre for Healthy Ageing
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- Citation topics
- 1 Clinical & Life Sciences
- 1.82 Gait & Posture
- 1.82.811 Transcranial Magnetic Stimulation
- Web Of Science research areas
- Neurosciences
- ESI research areas
- Neuroscience & Behavior