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Masseter
Medial pterygoid
Lateral pterygoid
Fig. 9.45 From the hyoid bone, there are connections both
forward to the jaw and back to the temporal bone of the cranium.
Temporalis
Fig. 9.47 Seen from below, the essential sling for the ramus of the
mandible created by the two masters acting in concert with the
two medial pterygoids is unmistakable.
Fig. 9.46 Though the case for a direct connection from the
delicate suprahyoid muscles to the strong jaw muscles is difficult
to make, there is definitely a mechanical connection from the floor
of the mouth to the jaw muscles to the facial and cranial bones.
(DVD ref: Early Dissective Evidence: Deep Front Line.)
Temporalis
sphenoid, together form a sling for the angle of the jaw
(Fig. 9.47). The temporalis pulls straight up on the coro-
noid process of the mandible from a broad attachment
on the temporal bone, and its fascia runs across the skull
coronally under the galea aponeurotica, the scalp fascia
that was involved in the SFL, SBL, LL, and SPL (Fig.
9.48).
Thus we see the complex core of the body's myofas-
cia, snaking up the 'hidden' places in the legs, passing
through the 'leg pit' into the trunk to join the tissues in
front of the spine. From here, we have seen it split (at
least for analysis) into three major routes: behind the
viscera directly in front of the spine, up through
the viscera themselves, and up in front of the viscera to
the throat and face.
Masseter
Medial pterygoid
Fig. 9.48 The upper reaches of the DFL includes the sling created
by the masseter on the outside and the medial pterygoid on the
inside, and the fascia from the temporalis which loops up over the
head beneath the SBL.
Discussion 1
The peroneals (fibularii), when locked short, tend to create
an everted, or pronated ankle, or a laterally rotated forefoot.
While the tibialis anterior has been seen to counterbalance
the peroneus longus, so does the tibialis posterior: if the
muscles of the deep posterior compartment are over-short-
ened, they tend to create an inverted or supinated ankle, or a
The Deep Front Line and stability in the legs
In the posture of the lower leg, the DFL structures tend to act
as counterbalance to the Lateral Line structures (Fig. 9.49).
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