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Cerebellar transcranial magnetic stimulation: The role of coil type from distinct manufacturers
Danny Spampinato1, Jaime Ibáñez2, Manos Spanoudakis1
1Department for Clinical and Movement Neurosciences, Institute of Neurology, University College London, United Kingdom.
Background:
Stimulating the cerebellum with transcranial magnetic stimulation is often perceived as uncomfortable. No study has systematically tested which coil design can effectively trigger a cerebellar response with the least discomfort.
Objective:
To determine the relationship between perceived discomfort and effectiveness of cerebellar stimulation using different coils: MagStim (70 mm, 110 mm-coated, 110-uncoated), MagVenture and Deymed.
Methods:
Using the cerebellar-brain inhibition (CBI) protocol, we conducted a CBI recruitment curve with respect to each participant's maximum tolerated-stimulus intensity (MTI) to assess how effective each coil was at activating the cerebellum.
Results:
Only the Deymed double-cone coil elicited CBI at low intensities (-20% MTI). At the MTI, the MagStim (110 mm coated/uncoated) and Deymed coils produced reliable CBI, whereas no CBI was found with the MagVenture coil.
Conclusion:
s: The Deymed double-cone coil was most effective at cerebellar stimulation at tolerable intensities. These results can guide coil selection and stimulation parameters when designing cerebellar TMS studies.
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