Hi, In vasovagal syncope, recovery occurs within minutes on lying down, as the blood supply to the brain is restored when the person lies down. There usually are no symptoms other than fainting. But in transient ischaemic attack (TIA), there are focal neurological deficits which clear up soon. It occurs when a clot lodges in a small vessel of the brain and this leads to neurological deficit. Recovery occurs when the clot is dislodged by itself and blood supply is resumed. Since this occurs before any permanent damage is done, symptoms are transient. Both disorders can be differentiated to some extent by their clinical features. Hope this helps you. Best wishes.