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Fig. 2.11 From the rhomboids (arrow on left) we could switch
onto either the serratus anterior with one track around the trunk
(dotted arrow under scapula - part of the Spiral Line, Ch. 6), or
the infraspinatus with another track out the arm (solid arrow on
right - part of the Deep Back Arm Line, Ch. 7).
under the scapula to the rib cage, but also (from the
fascial layer on the superficial side of the rhomboids) to
the infraspinatus, which carries on out the arm (Fig.
2.11). We will often see fascial and myofascial planes
divide or blend, and we will see the strain or force or
posture emphasize one track or another depending on
body position and outside forces. Which Anatomy Train
to use in any given posture or activity is not a matter
for voluntary choice, though individual patterns of
muscle contraction will be a factor, and adjustments -
say in a yoga pose - will change the exact route of force
transmission. By and large, however, the amount of
force down any given track is determined by the physics
of the situation.
A 'roundhouse' is where many myofascial vectors
meet and/or cross, the pubic bone or the anterior supe-
rior iliac spine being prime examples (Fig. 2.12). Because
of the competing tugs on these areas, noting their
position is crucial to an Anatomy Trains analysis of
Fig. 2.12 Many competing vectors of myofascial force proceed
out in all directions from the 'roundhouse' of the anterior superior
iliac spine.
an express affecting both joints. Deep to it lie two locals:
the adductor magnus - a one-joint local crossing the hip
and extending as well as adducting it - and the short
head of the biceps - a one-joint muscle crossing and
flexing only the knee (Fig. 2.13).
The significance of this phenomenon is that it is our
contention that general postural 'set' is determined less
by the superficial expresses than by the deeper locals,
which are too often ignored because they are 'out of
sight, out of mind'. This would suggest, for instance,
that an anterior tilt of the pelvis (postural hip flexion)
would yield more to release in the pectineus and iliacus
(single-joint hip flexors) than to release in the rectus
femoris or sartorius, or that chronic flexion of the elbow
would best be treated by release of the brachialis rather
than concentrating all our attention in the more obvious
and available biceps brachii.
4. 'Expresses' and 'locals'
Polyarticular muscles (crossing more than one joint)
abound on the body's surface. These muscles often
overlie a series of monarticular (single-joint) muscles,
each of which duplicates some single part of the overall
function of the polyarticular muscle. When this situa-
tion occurs within an Anatomy Train, we will call the
multi-joint muscles 'expresses' and the underlying
single-joint muscles 'locals'.
As an example, the long head of biceps femoris runs
from 'above' the hip joint to below the knee, hence it is
Summary of rules and guidelines
While we have attempted to be fairly thorough in pre-
senting what we have found to be the principal large
myofascial meridians at work in the human body (Fig.
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