A different ROM will not change how a muscle grows. It will change strength at different angles, but the muscle shape will not change because of it.
Like tuna guy said, there's SOME, and I repeat SOME evidence out there that certain fibers/portions of a muscle can be preferentially activated, but that's usually under very SUB-maximal load, such as during finely controlled work.
However, even IF a muscle could contract only a certain portion of itself under high stress, (and therefore cause site-specific growth), (which I maintain is bollox), changing the angle of the hand or width of the grip would CERTAINLY not make a difference.
If you were to argue that bent-over BB rows may cause different stimulation to the lats than weighted pull-ups, I'd still smack you and say you're wrong; the chief difference will be in the synergist muscles worked. However, I would say that these two exercises would be better candidates for "hitting the lats differently" than changing something as (relative to the lats) insignificant as the grip.
Like tuna guy said, there's SOME, and I repeat SOME evidence out there that certain fibers/portions of a muscle can be preferentially activated, but that's usually under very SUB-maximal load, such as during finely controlled work.
However, even IF a muscle could contract only a certain portion of itself under high stress, (and therefore cause site-specific growth), (which I maintain is bollox), changing the angle of the hand or width of the grip would CERTAINLY not make a difference.
If you were to argue that bent-over BB rows may cause different stimulation to the lats than weighted pull-ups, I'd still smack you and say you're wrong; the chief difference will be in the synergist muscles worked. However, I would say that these two exercises would be better candidates for "hitting the lats differently" than changing something as (relative to the lats) insignificant as the grip.