Davis suffered his concussion during the second-to-last snap in the 49ers' week 11 16-10 win over the New York Giants.
Also back at practice is cornerback Tramaine Brock, who has been recovering from a hamstring injury.
Anthony Davis (concussion) back at practice in what appears to be a limited capacity. Tramaine Brock (hamstring) also on hand for start.
— Matt Barrows (@mattbarrows) December 10, 2014