Credit: SWNS <br /><br />This heart-warming footage shows a dad struck down with devastating dementia springing “back to life” when he hears his favourite songs.<br /><br />Eddie O’Brien, 74, was diagnosed with the Alzheimer's three years ago after his family noticed he was forgetting names and getting lost on his way home.<br /><br />The debilitating condition can leave him struggling to verbally communicate with his family.
