3+ 4/2002 - Společnost pro pojivové tkáně

in sitting position. The difference is 4,67 %
of total length of thoracolumbal spine. On
the contrary as point x as the peak of lumbal
lordosis (point L) are relatively more
near to point C in sitting than in standing
position (differences are 2,69 % and 9,49 %
of the distance of points C and Lu). From
the examined differences then it follows
the moderate displacement of the peak of
thoracic kyphosis in sitting position caudal,
of lumbar lordosis on contrary cranial. The
constructed point x in sitting position is
shifted in average of the upper direction
only about 20,39 mm;this is – as I said already
– only 2,69 % of arithmetical mean of
thoracolumbal spine in standing position,
also substantial less distance than the point
L. As it follows from calculated indexes of
variability, individual most variable in both
research positions is the placement of the
peak of thoracic kyphosis (point T).
We also tested the percentuel differences
of the distances the points T, x and
Lfrom the point Cervicale (C) between the
standing and sitting positions. In accordance
with it, we established the statistical significant
differences for the peak of lumbar lordosis
only, also for the point L (table 4.).
It is possible presumed from advance
findings, that short of thoracolumbal spine
in sitting position (contrary to standing
position) sets above all in region of low
part, then in lumbar section.
Average perpendicular distance of the
peaks of both anteroposterior curves of thoracolumbal
spine in standing position (T – L)
is 236,43 mm, whereas in sitting position it
is 167,57 mm. Given values are 53,13 % of
total length of this section in standing and
38,97 % in sitting positions. The difference
68,86 mm between both these data is the
length of shortening between the peaks of
X s s x V
mm % mm % mm % %
T 141,60 31,82 34,17 7,68 3,38 0,76 24,00
x 261,40 58,74 24,74 5,56 2,44 0,55 9,00
L 378,03 84,95 25,59 5,75 2,54 0,57 7,00
sitting position
T 156,91 36,49 28,51 6,63 2,84 0,66 18,00
x 241,01 56,05 30,66 7,13 3,05 0,71 13,00
L 324,48 75,46 40,29 9,37 4,00 0,93 12,00
Tab. 3. Distance of points T, x and L of thoracolumbal spine from the point C in standing and sitting
positions. The percents from total length of thoracolumbal spine (C – Lu) in standing and sitting
positions.
h (P) C – T C – x C – L
h (99 %) ± 12,02 ± 12,69 ± 9,21
h (95 %) ± 9,13 ± 9,64 ± 6,99
Tab. 4. Limit of statistical conclusive evidence of percentual differences of the distance of points T, x
and L from the point C in standing and sitting positions.
POHYBOVÉ ÚSTROJÍ, ročník 9, 2002, č. 3+4 95