Patriots running back TreVeyon Henderson revealed Friday that he has spent several days in the hospital undergoing tests for unexplained neurological symptoms, an announcement that explains his recent absence from the team.

The 24-year-old said the symptoms have affected his strength and coordination, and doctors have yet to pinpoint a cause. He will miss Sunday's game as testing continues, per Yahoo Sports. The Associated Press reported that Henderson disclosed the hospitalization himself on Friday, putting an end to speculation about why he hadn't been with the club.

Head coach Mike Vrabel addressed the situation publicly the same day, responding to his running back's medical update as New England prepares to play without him. The team has not offered a timeline for his return, and given the open-ended nature of the diagnosis process, none may come soon.

For a back whose game is built on burst and balance, symptoms touching strength and coordination are about as serious as it gets. The immediate focus in Foxborough is medical, not football — the Patriots' backfield plans for Sunday are a footnote next to getting Henderson answers.