The reason Chunliang adopts this position is to create a gap between the spinous processes of the seventh cervical vertebra and the first thoracic vertebra of the child patient, facilitating needle insertion along the line of the nuchal ligament between the spinous processes.
Xu Chunliang quickly pushes the needle subcutaneously using the rapid puncture method, passing through the fat layer and nuchal ligament, stimulating the ligament which triggers the first needle sensation.
After two minutes of manipulation, upon further insertion through the nuchal ligament, there is a distinct sensation of heaviness and tension. Upon deeper insertion, the resistance slightly decreases, indicating entry into the interspinous ligament. Slightly adjusting the needle tip upwards, it reaches the bone surface of the spinous process, triggering the second needle sensation.
