Patent ID: 8535329

Claim:
An attachable surgical anchor, for attaching a trackable target in fixed relation to a human scapula during surgery, comprising: at least two bone screws; a body having a size and shape configured to engage a human coracoid process, said body having at least two bores for receiving the shafts of said bone screws, such that, when said body is properly positioned against a coracoid process to which said anchor is to be attached, said bores are positioned to direct said bone screws into said coracoid process thereby securing said body to the coracoid process, said body arranged such that at least two of said bores cannot move with respect to each other and are arranged at an angle relative to each other of greater than 0°; a coupling member, carried by said body and arranged to engage a complementary coupling member bearing an optically trackable target comprising a plurality of distributed, reflective markers which define a plane; and a complementary coupling member bearing a trackable target and which is arranged to engage said coupling member, such that said body and coupling member serve as a surgical anchor when attached to said coracoid process, said complementary coupling member and said trackable target being separate and distinct from said bores and said bone screws.