How do Yang divergent channels behave at their point of separation?

Yang divergent channels are known to separate from their primary channels at the point of separation in a distinct manner. Specifically, they diverge or separate from their corresponding yin primary channels and ascend to the head or neck region, which is critical for their physiological functions. This means that the correct answer accurately reflects how these channels behave at their separation point, indicating they do not simply remain close to the primary channel, nor do they enter local muscles and tissues as a primary action.

The nature of this divergence is essential for understanding the pathways of energy within the body and how they interact with the broader system of channels. In clinical practice, recognizing that these channels separate and rise to more central or significant areas helps acupuncturists treat conditions that may be related to those higher anatomical sites.

The option concerning convergence into primary yin channels does not align with the known behaviors of yang divergent channels, as they do not merge back with the yin channels; instead, their trajectory leads them independently into other areas of the body.