AN ANATOMICAL OBSERVATION OF THE FETAL ANTERIOR ABDOMINAL WALL / 解剖学报

The anterior abdominal wall of 44 fetuses, ranged from 3-10 months of age were studied. The results obtained were similar to Rizk's description. Each aponeurosis of the abdominal flat muscle was bilaminar, and both the anterior and posterior walls of the rectus sheath were trilaminar. The fibers of all the six aponeurotic layers were oblique and continuous across the mid-line with the corresponding aponeurotic layers of the opposite side to form digastric muscles. Besides, few fibres of the aponeurosis around the umbilicus attached themselves to the deep fascia of the umbilical cord. The linea alba may be considered as rather the intermediate aponeuroses of flat muscles of both sides than as their insertions. The present study showed that the bilaminar arrangement of each of the abdominal aponeuroses and the triiaminar (plywood) arrangement of each wall of the rectus sheath was formed early in fetal period. It is suggested that such arrangement of the aponeuroses of abdominal flat muscles may give the abdominal wall more elasticity and tenacity, and is also convenient for the independent movement of the rectus abdominis muscle.

DISTRIBUTION OF THE HAIR ON THE DIGITS OF THE HAND IN CHINESE / 解剖学报

The frequency and patterns of hair distribution on the phalanges of the hand were examined in the Chinese people. 646 male and female students from the Dalian medical college and the Dalian No. 20 senior middle school, aged between 18 and 25, were examined. Results obtained are similar to those reported in the literature, i. e. distal phalanges never showed hair, whereas hair existed on the proximal and middle phalanges, though the incidence and arrangement of the hair on those phalanges were variable. As to the incidence of hair on the middle phalanx in the Chinese, it was much lower than that in the white race, a little lower than that in the Bengali, Tibetans of our People′s Republic, and the Japanese, and a little higher than that in the Africans. We also noted an asymmetry of hair distribution on two sides of each phalanx existed on the proximal phalanges as well as on the whole finger. Incidence of hair on male fingers was higher than that on female fingers. Hair distribution on both hands in the same idividual was fundamentally symmetrical.

AN INVESTIGATION OF SUPRAPELVIC HEIGHT, PELVIC HEIGHT, AND SUBISCHEAL HEIGHT IN HEALTHY CHILDREN AGED 8-15 / 解剖学报

This paper reports a study of three components of stature for a sample of 605 healthy children aged 8-15. Suprapelvic height, pelvic height, and subischeal height are obtained by calculation on the basis of standing height, sitting height, total lower limb length, ankle height and bi-iliac width. By statistical analysis, sexual dimorphism is revealed in both suprapelvic height and pelvic height. The increase in pelvic height is greater in girls than boys, and occurs before the appearance of secondary sexual charateristics. The relationships between suprapelvic height and idiopathic scoliosis, and between pelvic height and low back pain are discussed.