Neurosurgeon Dr. Dong Kim says Giffords is doing well after Wednesday's surgery. They held a news conference Thursday to give an update on her condition.
The operation is another milestone in Giffords' recovery and will allow her to move around without the helmet she has worn since January when she began intensive rehabilitation at Houston's TIRR Memorial Hermann.
Giffords was shot in the head Jan. 8. Six people were killed and 12 others wounded in the assassination attempt in Tucson, Ariz.