(n.) The possession of more that the normal number of digits.
Example Sentences:
(1) Pathogenetically, the delta formation may represent an intermediate stage in the bifurcation process of a polydactylic ray.
(2) Two additional forms were also found: four cleft feet with central polydactyly are described as polydactylous type, and three monodactylous feet with lower-leg diastasis or tibial aplasia or both are described as diastatic type.
(3) The degree of enlargement of the nuclear volume fraction in the prechondral (chondrogenic) ray in relation to the mesenchyme is relatively greater in polydactyl embryos than in normodactyl embryos.
(4) The talpid2 (ta2) chick mutant has wide, polydactylous wings and legs.
(5) A significant (P less than or equal to 0.01) 19% increase, peculiar to the prospective polydactylous region, was measured after 4 hours in embryo culture.
(6) The following conclusions were drawn from examining this series and the damaged abortuses' case histories: 1) Major malformations such as central nervous system anomalies, cleft lip, polydactyle, and limb reductions were not caused by maternal genital bleeding but that the bleeding was a consequence of conceiving an abnormal embryo.
(7) The few anatomical findings summarized in the literature have now been expanded by our own anatomical dissections on four hands of still-born infants with postaxial polydactyly, and by intra-operative microsurgical investigations of 25 polydactylous hands.
(8) The infant of the women who had a detectable toxoplasma specific IgM exhibited polydactylism, a common congenital abnormality in Ibadan.
(9) Talpid2 is a simple Mendelian recessive lethal mutation which affects the mesoderm and results in short, spade-like, polydactylous wings and legs.
(10) Taken together, our results suggest that the in vitro outgrowth of the prospective polydactylous region is induced upon escape from the local growth-inhibitory influence of extracellular adenosine.
(11) The effect of this mutant mesenchyme on overlying ectodermal ridge, either mutant or normal, is to thicken the ridge preaxially, leading to increased outgrowth and preaxial polydactylism.
(12) Animals homozygous for the recessive, pleiotropic, mutation hpy(hydrocephalic-polydactyl) develop hydrocephalus early in the postnatal period.
(13) (b) On the 15th, 16th and 17th embryonal day the height of the AER in the praeaxial region of the polydactylous limb bud largely predominates over the controls.
(14) A morphometric analysis showed that formation of the prechondral blastemas was accompanied by a significant increase in the nuclear volume fraction in relation to the adjacent distal mesenchyme in both normodactyl and polydactyl embryos.
(15) A comparison of the height of the AER above digital rays and interdigital grooves of polydactylous and normodactylous animals does not thus exhibit any marked differences.
(16) Animals homozygous for the recessive, pleiotropic, mutation hpy (hydrocephalic-polydactyl) progressively lag behind their wild-type litter-mates in increase in body weight and brain dry weight over the period from 1-40 days post-partum; many homozygotes die within the first 14 days after birth.
(17) Previously only eight dogs with immotile cilia syndrome and a mutant hydrocephalic-polydactyl mouse were reported with respect to these phenomena.
(18) Polydactylous homozygous rats had two or three pollices (six or seven digits) in the forelimbs and one to three preaxial extra digits (six to eight digits) in the hindlimbs.
(19) The following findings were obtained: (a) On the 14th embryonal day, prior to the development of the anlage of mesenchymal condensates, the AER is higher in polydactylous animals as compared with the controls.
(20) There are, however, significant differences between the nuclear volume fractions of the mesenchymal cells at the chosen sites in normodactyl and polydactyl embryos at both 14 and 15 days.