If, as modern research would tend to suggest, puncturing the brain will deflate the zombie, we should notice that the brain, as an extension of the marrow which belongs to the kidney system, is nourished by those same herbs as nourish the kidney. And, as it would happen, the mind can be agitated as a result of heat, wind, or uprushing qi and, very surprisingly, yang. Or, to put it in words that make sense, the zombie brain is hot, windy, and overfull with qi. And, as I am crushed to discover, yang.
I believe we can accommodate this new information. I posit the previously held view that zombism is the result of an excess of yin is in fact still true! Whether this excess of yin is a true excess or merely the absence of yang is yet to be determined, but clearly we can describe at least in part how it occurs: THE YANG EXITS THE BODY PROPER AND COLLECTS IN THE BRAIN, CARRIED THERE BY THE UPRUSHING QI! Pesky qi. Pesky, pesky qi.
We may further discover an interesting causal relationship. As is known to all, a zombie bite will create another zombie, while an attack on the brain will kill, be the brain that a zombie or that of the living, and whether the attack is performed by another zombie or by an acupuncturist. As is plain for all to see, and this can be a medical maxim now, qi flees the site of a bite. And it will collect in the brain, or burst.
The zombie fascination with brains is quite clearly natural. They seek either to replenish their qi or rebalance their yin. It couldn't be more obvious.