Healthcare and Medicine Reference
Fig. 7.27 The deltoid connects under the brachialis to the lateral
intermuscular septum down to the lateral humeral epicondyle.
the lateral intermuscular septum (Fig. 7.27 and i tVC
Shoulders and Arm Lines, 54:56-55:53).
The septum, which divides the flexors from the exten-
sors (the 'front' and 'back' of the arm), passes down to
its lower attachment at the lateral humeral epicondyle.
From this station, the line continues directly onto the
common extensor tendon, picking up the many longitu-
dinal muscles that lie dorsal to the radius-ulna-interos-
seous membrane complex, passing under the dorsal
retinacula to the carpals and fingers (Fig. 7.28 and DVD
ref: Shoulders and Arm Lines, 55:53-57:33). Similarly to
the SFAL, the muscles show a reversal to the usual
arrangement, with the superficial muscles controlling
the carpals at the wrist, while the deep muscles reach
all the way to the fingertips.
The SBAL is a single fascial unity from the spine to
the backs of the fingertips (Fig. 7.29A.B and DVD ref:
Shoulders and Arm Lines, 57:35-59:00). This line controls
the arm for the limited amount of moving we do behind
our lateral midlines, like a backhand tennis shot, but
acts mostly to limit and contain the work of the SFAL.
The SBAL also controls the lifting (abduction) of the
shoulder and arm, so it tends to get overworked if
the rib cage or spine collapses or slumps out from under
the shoulder girdle.
Fig. 7.25 The Superficial Back Arm Line starts with the trapezio-
Fig. 7.26 The trapezio-deltoid complex can be seen as one large
triangular muscle that focuses down on the outside of the
humerus from a broad attachment along the whole upper spine.
Stretch assessment for the Superficial
and Deep Back Arm Lines
Face your client, take hold of her wrists, and have her
lean back from the ankles into the 'sling' of her arms,