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Table 1 Locations of acupoints for the acupoint EA and non-acupoint EA groups

From: Efficacy and safety of electroacupuncture treatment in the prevention of negative moods in healthy young men after 30 h of total sleep deprivation: study protocol for a single-center, single-blind, parallel-arm, randomized clinical trial

Group Acupoint Location Descriptions
1 Baihui (GV-20) At the vertex on the midline, in the depression 5 cun posterior to the anterior hairline and 7 cun superior to the posterior hairline Punctured horizontally 0.3–0.5 cun
Shenmen (HT-7) At the wrist joint, on the radial side of flexor carpi ulnaris, in the depression at the proximal border of the pisiform bone Punctured perpendicularly 0.5–0.8 cun
Sanyinjiao (SP-6) On the medial side of the lower leg, 3 cun superior to the prominence of the medial malleolus, in a depression close to the medial crest of the tibia Punctured perpendicularly 1.0–1.5 cun
2 Non-acupoint 1 On the edge of the tibia 1 to 2 cm lateral to the Zusanli (ST36) horizontally Punctured perpendicularly 0.5–1 cun
Non-acupoint 2 On the half between the tip of the elbow and the axilla Punctured perpendicularly 0.5–1 cun
Non-acupoint 3 On the ulnar side, half between the epicondylus medialis of the humerus and the ulnar side of the wrist Punctured perpendicularly 0.5–1 cun
  1. Group 1: acupoints electroacupuncture group
  2. Group 2: non-acupoints electroacupuncture control group
  3. a1 cun (≈ 20 mm) is defined as the width of the interphalangeal joint of the patient’s thumb