Therapy dogs for autism can assist with emotional and physical support. Having a solid and reassuring companion is meant to help ease sensory overload and help the autistic child focus and learn to filter out sensory input.
From a vagal perspective, the dog can have a soothing and calming effect on the ‘old vagus’, allowing the child to learn to put the ‘vagal brake’ on and a parasympathetic state to ensue, which can enable a greater capacity for learning and communication.