Biomedical subjects

C A Hughes-Lawson

Publications and source records attributed to C A Hughes-Lawson.

4 recordsLinked to original sources

PubMed1989

Developmental changes in the facial soft tissues.

Short-base stereophotogrammetry was used to study differential growth and development of the soft tissues of the face. Thirteen facial parameters were measured at ages 9, 11, 13, 15, and 16 years on 170 facial contour maps selected from a mixed longitudinal study of 26 boys and 26 girls. Each parameter was measured three-dimensionally, and its developmental progress at the earlier stages was expressed as a percentage of its value at 16 years of age. Standing height development was assessed in the same way. Three parameters that measured soft tissues surrounding the eyes grew little but were very advanced in their development, following a "neural" pattern. The remaining facial parameters grew more but were less advanced, and standing height was least advanced. There appeared to be three separate patterns of development, "neural," "facial," and "skeletal." Girls were, in general, smaller than boys, but their development was more advanced when measured as a percentage of size at 16 years compared with boys.

Adolescent↗

PubMed1989

Stereophotogrammetric study of growth and development of the nose.

A total of 269 contour maps of the face were measured in three dimensions to study growth and development of the nose. The maps were derived from a mixed longitudinal study of 26 boys and 26 girls between the ages of 9 and 16 years, and were recorded annually. Various nasal parameters were measured to study growth of linear parameters and external nasal volume. Apart from dorsum of the nose between 9 and 11 years of age, all linear parameters were larger for boys by an amount increasing with age. The early growth in girls and late growth in boys suggested the presence of an adolescent growth spurt in the nose, which was confirmed by volumetric measurements. Developmentally the greatest change occurred in anteroposterior prominence of nasal tip in both sexes and the least change occurred in intercanthal width.

Adolescent↗

PubMed1988

The growth and development of the soft tissues of the human face.

The complexity of shape, soft nature of the facial tissues and the sensitivity of the eyes make their accurate direct measurement difficult. Short base stereophotogrammetry is three dimensional and non-invasive. This technique was used to measure the faces of 52 like-sexed twins between the ages of 9 and 16 years in a mixed longitudinal study. Certain vertical and horizontal parameters defining the eyes, the nose, the mouth and overall facial shape were remeasured and plotted for this study. Relative to the intercanthal line, the alae of nose and angles of mouth are displaced by growth, on or very near to straight lines which were not parallel, indicating a small change of proportion between nose and mouth. Their steepness is a measure of the dominance of vertical over lateral growth. Knowledge of normal growth changes will help to predict soft tissue changes produced by orthodontic or surgical treatment in the faces of children.

Adolescent↗

PubMedDate not supplied

The adolescent growth spurt in the soft tissues of the face.

The faces of 8 boys and 8 girls were recorded annually by short base stereophotogrammetry. The output for the 16 children consisted of 158 life-size facial maps allowing the serial three-dimensional measurement of 13 soft tissue facial parameters. Three of these parameters (1, 2 and 3) measured the width of the palpebral fissures and the intercanthal distance and were therefore related to the eyes, and 'neural' in character. The remaining 10 parameters (4-13) measured facial characteristics. Standing height was also recorded. The values for each characteristic were age-corrected. Means for the different soft tissue facial parameters are reported for ages 9-16 years. The original individual readings were then three-point smoothed and related first to the year in which peak growth was achieved in standing height, second to the two years preceding and, third, to the two years following that year. The means for the 10 facial parameter growth velocities extending below the eyes showed an adolescent growth spurt related to that in standing height, although not necessarily coinciding with that year. Of the 10 parameters, 5 peaked in PHV year, 3 in -1 PHV year and 2 in +1 PHV year. The facial parameters at eye level, which are really 'neural' parameters, showed much smaller growth velocities and no spurt.

Adolescent↗