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CHARACTERISTIC FEATURES OF MORPHOMETRIC INDICATORS
OF RIGHT-HANDERS AND LEFT-HANDERS IN THE SECOND
PERIOD OF CHILDHOOD.
Rustamova N.B.
Abu Ali ibn Sino Bukhara State Medical Institute
https://doi.org/10.5281/zenodo.14265140
Abstract:
The analysis was carried out on 10-year-old children of
secondary schools №7. The results of the study showed that 10-year-old left-
handed children lagged somewhat behind in physical development (div weight
and chest circumference) compared to right-handed children of the same age,
while the height and size of the left hand increased significantly.
Keywords:
Anthropometric
indicators,
height,
div
weight,
interhemispheric asymmetry.
Relevance of the topic.
Today children's applause is relevant and does
not have the problem of a certain approach in the field of pedagogy and physical
education. Some researchers have developed methods for teaching squirrels to
the right, while others; on the contrary, have a positive attitude to the
phenomenon. An individual approach has not been developed.
In our opinion, this problem requires one solution, since different forms of
training and retraining of the left hand can negatively affect their physical and
mental development. The issue of a differentiated approach to teaching (the
teacher takes into account the individual characteristics of a student or a group
of students in the learning process) is the basis of modern pedagogy [1, 28, 29,
30].
The negative attitude towards the left hand has a long history and is
reflected in the events, actions and attitudes associated with the right and left
hand in different cultures [2].
As a rule, in different cultures, positive qualities are associated with the
right side, negative - with the left. Perhaps this is one of the manifestations of the
right-left attitude, as in different cultures. Many researchers note that among
left-handed children there are children who are able to perform motor
movements at a high level, but there are also certain difficulties in performing
awkward and incoherent movements and developing skills [7, 11, 28].
This is probably due to the congenital left hand. The advantage of the left
hemisphere lies not only in the superiority of the left hand in performing motor
movements, but also in the distribution of various functions (motor, visual,
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sensory, etc.) between the right and left hemispheres as a kind of reflection of
interhemispherik asymmetry. [1, 10, 27].
We are often confronted with similar views of the left hand and
relationships like this. Perhaps the decisive factor is negligence,
misunderstanding of the biological mechanisms of flattery, and most
importantly, the inability of children to accept a variety of individual differences,
their abilities, inclinations, differences in reactions, under the influence of the
same factors, these individual characteristics [2, 24].
The number of left-handers in the world has a positive trend: if in 1928
3.3% of left-handers and 4.7% of left-handed men were identified, then in 1973 -
8.8% of left-handers and 10.4% of left-handers. Left-handed men, 1978-1988
Over the years, the number of left-handers increased by 12.4%, and left- Journal
of Healthcare and Life-Science Research Vol. 2, No. 3, 2023 ISSN:2181-4368 5
handed men - by 13.9%. The increase in the number of students in schools in
Ishim in 1998 was 5.2%, in 1999 - 6.1%. , in 2000 - 5.5%, in 2001 - 7.5%, in 2002
- 7.9%, in 2003 - 8.3%, in 2004 - 8, 6% [12].
A decrease in intellectual abilities of a protein may have only one cause - it
is a developmental pathology, but healthy proteins can also have remarkable
abilities, there are plenty of such data [21, 23, and 26].
Lefties have peculiarities of visual perception of information. It was found
that the well-being of the visual system is especially characteristic of left-handed
children [11,18].
On the contrary, cases such as asthenic neurosis are more common in
children of primary school age. This is accompanied by a decrease in working
capacity and activity, increased fatigue, and rapid fatigue. The peak of activity is
observed only in the first two lessons, after which a decrease in endurance and
motor movements is observed in children. In the following hours, children feel
tired, lethargic and lose interest in new information [1, 5, and 23].
It is recommended to start teaching children at school, as well as problems
with such disorders as coordination of movements, including the lack of fine
motor skills of the leading hand and the perception of div shapes through the
program, the whole system discusses exercises for corrective work has
significant opportunities in practice [6,11, 16,22,24].
The analysis of the available literature showed that the anthropometric
parameters in one or another part of the div were not studied individually and
to a certain extent in the “left-handed” complex for children. There is no data on
the morphometric parameters of the div parts of left-handed children
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depending on age and sexual demorphism. All this requires a deep study of the
problem and analysis of the data obtained in the future.
Objective of the study:
to study the comparative characteristics of
morphometric indicators in children and adolescents 10 years old.
Research material:
conducted on the basis of bilateral agreements of the
Bukhara State Medical Institute in secondary school No. 7 in Bukhara (No. 517
dated 02.05.2020). Children were divided into 2 groups (n = 40): I - 10-year-olds
group (n = 20); II- The results of a survey of a group of 10-year-old children (n =
20) were studied.
To carry out anthropometric measurements, the method of
anthropometric research of children was used (morphometric features of
assessing the physical development of children and adolescents - guidelines //
Shomirzaev N.Kh., Ten S.A., Tukhtanazarova I., 1998). Anthropometric studies
included measurements of height, div weight, arm length, and chest
circumference. Mathematical processing was carried out directly from the
general data matrix Excel 7.0 using the capabilities of STTGRAPH 5.1, indicators
of standard deviation and presentation errors were identified.
Research results and discussion.
Studies have shown that 10-year-old
left-handers had a height of 126.4 to 150.2 cm, on average 134.6 ± 1152 cm, and
in a right-wing woman of the same age - from 126.1 to 142.3 cm, an average of
134. 4 ± 0.768 cm. The div weight of a left-handed woman ranged from 22.3 kg
to 36.5 kg, on average 29.05 ± 0.696 kg, and in a right-handed woman of the
same age - from 23.5 kg to 44.5 kg, on average 30.3 ± 1.008 kg.
The length of the left arm ranged from 53.2 cm to 63.4 cm on average in
10-year-old left-handers, 57.5 ± 0.48 cm on average, and from 52.0 to 61.3 cm in
right-handed people, on average 55.6 ± 0.432 cm. Chest circumference in left-
handed people averaged 63.05 ± 0.504 cm, and in right-handed people - on
average 65.7 ± 1.032 cm.
Anthropometric studies among left-handed and ruling children showed
that the right-hander was 0.20 cm lower than that of the left-hander of the same
age, and that the div weight of the left-hander was 1.25 kg higher than that of
the left-hander of the same age. In 10-year-old left-handers, the length of the left
arm turned out to be 1.90 cm longer than in righthanders. The size of the
thoracic circumference turned out to be 2.65 cm wider on right-handed people
than on left-handed people of the same age.
Conclusions:
According to the data obtained, 10-year-old children lagged
slightly behind in physical development (div weight and chest circumference)
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compared to children of the same age, on the contrary, there was a significant
increase in the height and length of the left arm
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