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Table 2 Locations of non-acupoints for sham acupuncture

From: The cerebral mechanism of the specific and nonspecific effects of acupuncture based on knee osteoarthritis: study protocol for a randomized controlled trial

Acupoints Locationsa
NA1 On the anterior aspect of the thigh, 6 cun above the upper edge of the patella (between the spleen and stomach meridian)
NA2 On the anterior aspect of the thigh, 5 cun above the upper edge of the patella (between the spleen and stomach meridian)
NA3 On the anterior aspect of the thigh, 4 cun above the upper edge of the patella (between the spleen and stomach meridian)
NA4 In the middle of GB34 and ST36 (between the gallbladder and bladder meridian)
NA5 3 cun below GB34 (between the gallbladder and bladder meridian)
NA6 2 cun above the medial malleolus (between the liver and spleen meridian)
NA7 In the middle of GB40 and ST41 (between the gallbladder and bladder meridian)
  1. NA non-acupoints
  2. a1 cun (≈ 20 mm) is defined as the width of the interphalangeal joint of the participant’s thumb