Commatose refers to the state or condition of a Communication student who chooses sleeping so sound over doing school requirements that keep on piling up while she/he is asleep.
An example of a commatose sentence, Once, well, now actually, the was a beautiful, as is really great looking, woman who fantasized, online, that she was the super hero, Wonder Woman.
Passed out from overuse of certain punctuation marks, or from overly-fastidious attention-to-detail behavior regarding said symbols in text-composition.
I can see how one might become commatose from excessively using "long-tailed periods", but what about over-indulging in other punctuation marks, such as parentheses or semicolons? Would that produce a similar limp/unresponsive state?