Ultrasonographic Assessment of Thoracolumbar Fascia in AxSpA and Controls With Trigger Point Evaluation

"Patients were positioned in the prone position, with a cushion placed under the abdomen to flatten the lumbar lordosis.~A 14-18 MHz linear transducer was used for ultrasonographic (USG) evaluation, performed with a GE Logiq P5 ultrasound device (Serial No: GE-114118SU3).~The USG probe was placed longitudinally at the L2-L3 intervertebral level, 2 cm lateral to the vertical line connecting the spinous processes on both sides, in order to assess the thoracolumbar fascia (TLF)."