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Bony stations
Myofascial tracks
Back Functional Line
Shaft of humerus 1
Latissimus dorsi
Lumbodorsal fascia
Sacral fascia
Sacrum 5
Gluteus maximus
Shaft of femur 7
Vastus lateralis
Patella 9
10 Subpatellar tendon
Tuberosity of tibia 11
Front Functional Line
Shaft of humerus 1
Lower edge of pectoralis major
5th rib and 6th rib cartilage 3
Lateral sheath of rectus
Pubic tubercle and symphysis 5
Adductor longus
Linea aspera of femur 7
Fig. 8.3 The Functional Lines add the impetus of the trunk
momentum and musculature to the strength of the limbs,
stabilized by the contralateral girdle. In this instance, as the arm is
drawn back to throw the javelin, the right Back Functional Line is
contracted, while the right Front Functional Line is stretched and
readied for contraction. The left FFL is lightly shortened, and the
left BFL lightly stretched during this maneuver. When the javelin is
thrown, all these conditions reverse - the right FFL contracts, the
right BFL is stretched, and their left-side complements exchange
stabilizing roles.
The BFL crosses the midline approximately at the
level of the sacrolumbar junction, passing through the
sacral fascia to connect with the lower (sacral and sacro-
tuberal) fibers of the gluteus maximus on the opposite
The lower fibers of gluteus maximus pass under the
posterior edge of the iliotibial tract (ITT), and thus under
the Lateral Line, to attach to the posterolateral edge of
the femur, about one-third of the way down the femoral
shaft. If we continue on in the same direction, we find
fascial fibers linking the gluteus and the vastus lateralis
muscle, which in turn link us down through the quad-
riceps tendon to the patella, which is connected, via the
subpatellar tendon, to the tibial tuberosity. We choose to
end the line analysis here, though, having reached the
tibial tuberosity, we could continue this line down to
the medial arch by means of the tibialis anterior and
the anterior crural fascia (as discussed in Ch. 4 on the
Fig. 8.2 Functional Lines tracks and stations.
Front or Deep Back Arm Lines, depending on the par-
ticular action) with the distal attachment of the latissi-
mus dorsi (see Fig. 8.1A). It runs down a little lower than
the approximate center of that muscle's spread, joining
into the laminae of the sacrolumbar fascia.
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