renlute wrote: ↑
Tue May 23, 2017 5:43 am
I you understand why Pat thought distal flexion was a risk, then you can't deny that it makes perfect sense. The underlying problem, Pat explains, is the structure of the flexor digitorum profundus, the muscle that flexes the tip joints but also causes simultaneous cocontraction of the extensors for the same joints.
renlute wrote: ↑
Tue May 23, 2017 5:47 am
I should add that New York pianist Dorothy Taubman seems to have discovered the problematical distal flexion independently of Patrick and about the same time. Neurologist Frank Wilson mentions both of them in his explication of the issue in his book The Hand, page 357.
And in the classical guitar literature, Christopher Berg addressed this issue of co-contraction at length in his book published in the 90's, 'Mastering Guitar Technique: Process and Essence'.
Berg's book remains, as far as I am aware, the most detailed exposition of cg technique derived from an anatomical understanding of hand function. His work is fully referenced, and he devotes several pages to the tip/distal joint, explaining the multiple problems caused by deliberate continuous flexion of this joint. Whether or not this can lead to FD (and Berg makes no mention of FD) remains to be proven, although the risks of injury are very clear and it is extraordinary that there are several respected pedagogical works out there (often recommended on this forum) that instruct students to make a conscious effort to keep the distal joints firm.
None of my teachers advised me to keep my tips firm, but in my quest for volume and speed its something I unconsciously did, and I ended up with FD.
I'd b interested to hear more about these 'other' technical problems Pat observed - the ones you mention earlier.