Aberdeen have landed Middlesbrough's teenage midfielder Josh Walker on loan for the rest of the season.

The highly-rated 18-year-old made his only first-team appearance so far for Boro in May 2006, when he played against Fulham in the Barclays Premier League.

Walker, who has captained England at Under-16 and Under-17 level, had a loan spell with Bournemouth last season.