Inclusion Criteria:  Individuals to be included in all groups 18-50 years Score between 0.5 and 3.5 according to CSS (Clinical Severity Score) of the cases to be included in the intervention groups. Be rated between 3-5 according to FAS (functional ambulation scale) of the cases to be included in intervention groups For patients who will be included in the intervention group who have undergone surgery, bilateral scapulothoracic arthrodesis surgery within 3 months at the earliest Individuals who will be included in the control group consisting of healthy individuals have not undergone any orthopedic surgery  Exclusion Criteria:  Having received regular physiotherapy for 1 month, at least 2 days a week in the last 6 months Presence of additional neurological problem/problems Presence of any other upper limb problem/problems and surgery Presence of lower limb problems/problems that can cause balance and walking problems Having undergone Spinal fusion surgery Having lower back pain described 6 and above according to VAS (Visual Analog Scale) in intervention and control groups Having a level of visual and auditory problems that will prevent communication