What does consciousness (vijñāna) refer to respectively in the twelve links and the ten links of dependent arising?

In the twelve links of dependent origination, ignorance conditions volitional formations, and volitional formations condition consciousness; the consciousness here refers to the six consciousnesses. Because the bodily, verbal, and mental actions created by the six consciousnesses store karmic seeds for future lives, one enters the womb and thus has name-and-form in later lives. However, in the ten links of dependent origination, where consciousness conditions name-and-form, and name-and-form conditions consciousness, the consciousness here does not refer to the six consciousnesses. This is because the meaning of "name-and-form conditions consciousness" is that name-and-form depends on this consciousness in order to have the phenomena of arising, abiding, changing, and ceasing; this consciousness exists first, and only afterward does name-and-form arise, and only then do the six consciousnesses arise. Name-and-form already includes the six consciousnesses, so the six consciousnesses exist in dependence upon name-and-form; they are subject to arising, abiding, changing, and ceasing, and they also depend on this consciousness in order to have arising, abiding, changing, and ceasing.

Therefore, the consciousness in "name-and-form conditions consciousness" is not identical to the six consciousnesses; rather, it is a relationship of that which gives birth and that which is born. This consciousness is the fundamental consciousness that exists prior to heaven and earth—the ālayavijñāna, which is unborn and unceasing and capable of giving rise to all dharmas.