The
driver is sitting on the seat of the car, but
his pelvis has rolled posteriorly, extending
his hips. The trunk has flexed over the pelvis
so that the vertebral column is compressed
anteriorly and the cervical spine is lordosed
so that the chin pokes forward on an extended
atlanto occipital joint and flexed lower cervical
spine.
The
lower limbs are extended at the knees and
are supported by the foot controls of the
vehicle. This knee posture may be responsible
for the posture of the spine through the
tension on the hamstring muscle group and
may, in turn, be caused by the incorrect
adjustment of the relationship of the seat
to the foot controls and steering wheel.
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The
upper limbs are flexed at the elbows and the
hands are gripping each side of the steering
wheel very tightly with the wrists flexed.
The
back is not fully
supported, as the
scapular area has
been brought away
from the support
of the seat by the
flexion of the trunk.
Apart from being
s posture of musculoskeletal
discomfort, this
posture will restrict
respiration, stretch
the hamstring muscles
and possibly also
the sciatic nerve,
may cause root pressure
in the cervical region,
leading to severe
head and neck aches
and may interfere
with the conductivity
of the nerves arising
from the brachial
plexus. There will
be disc pressure
in the lumbar region
with possible subsequent
back pain and nerve
root pressure in
the lumbosacral regions.
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