Thanks Jeff for the link.

The paper at

http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0137289

has a good discussion of the concepts they investigated in their 8 subjects.

It looks like a long way from generalising to upper limb movements, let
alone the possibilities of whole body kinematics.

As previously noted, the big deal is in training people not only after
injury (e.g. 'breaking in' a regrown limb at typical Traveller TLs) but
in healthy individuals.

Error augmentation/reduction/magnification techniques could be used to
improve dexterity or performance (ISTR the paper's authors use the
example of a pilot operating a plane in turbulence).

So to answer the initial question, somewhere between TL 11-13 built into
the dynamically reconfigurable control systems for vehicles,
battledress, vaccsuits, etc.

The operator can dial up the degree of support/hindrance according to need.

Vehicles will have overrides for the reason Bruce Johnson mentioned;
human operators are too slow in most crisis situations.

Rob O'Connor