Search results
Results from the WOW.Com Content Network
There are two main theories on the aetiology of palatally impacted canines. One is the genetic theory whereby the cause is thought to be polygenic. There is a high rate of incidence of ectopic canines with dental anomalies such as pegged lateral incisors, missing lateral incisors, delayed eruption, and the absence of crowding.
Extracting both primary canines and first molars – this is a compromise between rapid improvement in incisor alignment and the desired early eruption of first premolars. In some cases this sequence results in simultaneous eruption of canines and first premolar, which may cause an increased distal translation of the permanent canines and ...
The right permanent maxillary canine is known as "6" and the left "11". In the Palmer notation , a number is used in conjunction with a symbol designating in which quadrant the tooth is found. For this tooth, the left and right canines would have the same number, "3", but the right is designated with the symbol "┘" under the number, and the ...
In humans, the upper canine teeth (popularly called eye teeth, from their position under the eyes [1]) are larger and longer than the lower, and usually present a distinct basal ridge. Eruption typically occurs between the ages of eleven and twelve years for upper canines and between nine and ten years for lower canines.
The Intelligence of Dogs: A Guide to the Thoughts, Emotions, and Inner Lives of Our Canine Companions is a 1994 book on dog intelligence by Stanley Coren, a professor of canine psychology at the University of British Columbia. [1] The book explains Coren's theories about the differences in intelligence between various breeds of dogs.
This schema constitutes a basic framework of the overlapping behavioural fields of ethology, behavioural ecology, comparative psychology, sociobiology, evolutionary psychology, and anthropology. Julian Huxley identified the first three questions. Niko Tinbergen gave only the fourth question, as Huxley's questions failed to distinguish between ...
This depends on the measure, for example: weaning in non-human primates is often associated with eruption of permanent molars (humans: 5 + 1 ⁄ 2 to 6 years); comparing duration of nursing to length of pregnancy (gestation time) yields a factor of about 6 in chimpanzees and gorillas (humans: 6 × 9 months = 54 months = 4 + 1 ⁄ 2 years); body ...
The term instinctive drift was coined by married couple Keller and Marian Breland Bailey, former psychology graduate students of B.F. Skinner at the University of Minnesota. Keller and Marian were recruited to work with B.F. Skinner on a project to train pigeons to pilot bombs towards targets to aid with World War II efforts. [ 3 ]