The plantar fascia provides supination moment to
the foot via the windlass mechanism. In the presence of excessive
STJ pronation moment the loading on the plantar fascia may
be increased, leading to micro-failure at the enthesis. We examine
spatial orientation of the STJ axis and the position of the CoP relative to
this. By providing an external source of supination moment either via orthotics
or taping (although the ability to do this with tape is highly questionable) we
may "off-load" the plantar fascia to some degree. Also recent research shows a
direct relationship between tension in the plantar fascia and tension in the
Achilles tendon and degree of dorsiflexion at the hallux: stretch soleus
/gastroc with toes dorsiflexed.
Best wishes,
Simon
**************************************************
Simon K. Spooner
PhD, BSc, SRCh
Lecturer Biomechanics
Plymouth School of Podiatry
North
Road West
Plymouth, UK
PL1
5BY
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----- Original Message -----
Sent: Tuesday, November 06, 2001 3:31
PM
Subject: Re: plantar fascia,
correct. It is largely
non-elastic and that's why we get the irritation at the attachments. It is
precisely at that weak point/tissue interface that I am referring to when I
mean and in commas "tighten up". Perhaps I should say seize up somewhat with
the products of repair mechanisms. I cannot see how taping a calcaneous into
supination could help anything. This sounds like trying to shift the pain
rather than the problem?
Surely some aspects of this are individual
genetics, some are training issues, some diet. Biomechanics about the subtalar
and midtarsal joint should be examined,. The role of soleus during gait
(eccentrically) should be examined as should hip joint rotation throughout
stance and pelvic stability at heal strike. One may speculate that this
individual lacks internal hip joint rotation either in supine or at 90 degress
hip flexion (compare it to the opposite side). Lack of hip extension or a
decrease in dorsiflexion will also cause an increased strain on the plantar
fascia.
Any more ideas?
