Late onset esotropia in monozygous twins.

Pursuit eye movements in late-onset esotropia.

Horizontal, smooth pursuit eye movements were recorded from adults and children with infantile and late-onset esotropia using a remote, video-based, eye-movement recording system. Each subject monocularly tracked a 0.5-degree target moving back and forth on a video monitor at a constant velocity of 10 degrees, over a range of 12 degrees. Each subject's nasal and temporal gain (eye velocity/targ...

Microcephaly in one of monozygous twins.

Twin studies have frequently been carried out by those interested in the causation of mental deficiency. Some of the work on this subject is summarized by Book, Schut and Reed (1953). It is assumed that if the twins are monozygous then hereditary factors will be identical; it is often assumed that the intrauterine environment will likewise be identical. Though this may be true in general, there...

Monozygous twins with hypothyroidism and diabetes mellitus.

Heritability of liability and concordance in monozygous twins.

Falconer (1965) presented a method of measuring the correlation between relatives for a disease from data on the incidences of the disease in the general population and among relatives of affected individuals. The model assumes an underlying continuous liability to a disease, the liability being made up of many genetic and environmental factors and thus normally distributed. The disease becomes...

Fascicle length of gastrocnemius muscles in monozygous twins.

A large inter-individual variation is seen in muscle fascicle length of the athletes but the reasons for this phenomenon are unclear. The purpose of this study was to determine whether genetic factors contribute to the variances in muscle architectural characteristics. Nine monozygous twin pairs (3 males and 6 females), mean age 23 years (range 17-40) were studied. Fascicle length, pennation an...