“…In non-specific chronic pain, VH is present and is <1 diopter ( 17 , 18 ). It was reported that in patients with non-specific chronic pain associated with VH, a specific proprioceptive physiotherapy acting on oropharynx, temporomandibular joint, and/or pelvis most of the time restored VO immediately ( 14 ), diminished pain [evaluated with a subjective visual analog scale (VAS) ( 19 , 20 )], normalized behavior in the balance tests, improved mobility of peripheral joints and of the spine including the neck after initial alternation, but this remains to be precisely measured ( 15 , 16 ).…”