Keith Davies was rushed to accident and emergency late on Wednesday night. The Labour AM, 71, had attended a function organised by a public affairs group earlier in the evening.
On Wednesday night Keith Davies was admitted to the University Hospital of Wales in Cardiff. He is currently undergoing tests at the neurosurgical unit. Everyone in Welsh Labour wishes him a speedy recovery.
Mr Davies is a father of two, who is married to wife Heddyr.
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There will be a number of road closures in place in Cardiff today as the British Speedway Grand Prix returns to the Welsh Capital.
Today will be a day of often heavy showers, with the risk of hail and thunder.