Abstract
Mutations in the CACNA1A gene can cause familial hemiplegic migraine (FHM) and/or cerebellar ataxia. CACNA1A codes for the α1 subunit of P/Q-Ca2+ channels and is highly expressed in the cerebellum. Using a pointing paradigm and infrared optoelectronic tracking system, we found subclinical hypermetria and other subtle cerebellar signs in the common forms of migraine. These were more pronounced in migraine with than without aura. Whether this reflects involvement of Ca2+ channel genes in the common types of migraine needs to be investigated by genetic analyses.
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