수면자세와 두형의 상관성에 관한 연구榮

Abstract

[한글]

Study on the relationship between the sleeping posture and head form.

Soo Young Whang, M.D.

Department of Medical Science, The Graduate School, Yonsei University

(Directed by Prof. Yun, Duk Jin)

Davenport(1936) found that 87% of the human skull growth came in the first two

years of life, a time also associated with a very rapid growth of the nervous

system.

Among the many indices used to measure head form the length-breadth cephalic

index is the most widely used index. Although head from is determined mainly by

heredity, other factors such as temperature and sleeping posture have been

considered. Hrdlicka(1908), Bean et al (1923), Bayley (1936), Ra(1968), Baum et al

(1971) have all reported flattening of the occiput secondary to use of the cradle

board or to the supine posture during sleep. However, there have not been any

studies which evaluate different infant sleeping postures as to their effect on

head form. Such is the purpose of this study.

Infants from higher social class families which were seen in the Severance

hospital well-baby clinic were used for the study group. The head length and

breadth were measured and the cephalic index calculated by the cross-secsional

method.

The subsequent effect of sleeping posture habits developed in infancy were

studied in seven year old children. An attempt was made to find a correlation

between I.Q. and the cephalic index in the seven year olds.

The following conclusions are summerized below:

1) Stomach sleepers have an increase in head length, and back sleepers an

increase in head width under the 2 year group. The decrease in cephalic index in

male stomach sleepers is caused by the increase in head length and the decrease in

cephalic index in female stomach sleepers is secondary to increasing head length

and decreasing head width.

2) Under the 2 year group, there is Statistically significant difference in

cephalic index related to sleeping posture.

3) Among the 7 year old children there is a statistically significant difference

in cephalic index related to sleeping posture.

4) There was no correlation between the cephalic index and the 7 year old child's

I.Q.

In conclusion, this study demonstrated changes in head form, as measured by the

cephalic index, secondary to the child's sleeping posture from infancy through the

7th year. As there is an increase in Korean children sleeping in the prone position

there will be an decrease in cephalic index in the future head form in Korean

children. This change is believed to be related to the sleeping posture at infancy.

[영문]

Davenport(1936) found that 87% of the human skull growth came in the first two years of life, a time also associated with a very rapid growth of the nervous system.

Among the many indices used to measure head form the length-breadth cephalic index is the most widely used index. Although head from is determined mainly by heredity, other factors such as temperature and sleeping posture have been considered. Hrdlicka(1908), Bean et al (1923), Bayley (1936), Ra(1968), Baum et al (1971) have all reported flattening of the occiput secondary to use of the cradle board or to the supine posture during sleep. However, there have not been any studies which evaluate different infant sleeping postures as to their effect on

head form. Such is the purpose of this study.

Infants from higher social class families which were seen in the Severance hospital well-baby clinic were used for the study group. The head length and breadth were measured and the cephalic index calculated by the cross-secsional method.

The subsequent effect of sleeping posture habits developed in infancy were studied in seven year old children. An attempt was made to find a correlation between I.Q. and the cephalic index in the seven year olds.

The following conclusions are summerized below:

1) Stomach sleepers have an increase in head length, and back sleepers an increase in head width under the 2 year group. The decrease in cephalic index in male stomach sleepers is caused by the increase in head length and the decrease in cephalic index in female stomach sleepers is secondary to increasing head length

and decreasing head width.

2) Under the 2 year group, there is Statistically significant difference in cephalic index related to sleeping posture.

3) Among the 7 year old children there is a statistically significant difference in cephalic index related to sleeping posture.

4) There was no correlation between the cephalic index and the 7 year old child's I.Q.

In conclusion, this study demonstrated changes in head form, as measured by the cephalic index, secondary to the child's sleeping posture from infancy through the 7th year. As there is an increase in Korean children sleeping in the prone position

there will be an decrease in cephalic index in the future head form in Korean children. This change is believed to be related to the sleeping posture at infancy.