Studies of embryonic and fetal behavior now include such forms as the toadfish,
salamander, turtle, chick, rat, guinea pig, cat and human. The results of these studies have …

In 1933 the author began a series of experiments upon the embryos of carrier pigeons with
the view of studying the development of behavior as part of Doctor Coghill's program at The …

Publisher Summary The behavioral development of the chick embryo has been studied by
recording spontaneous and sensory-evoked movements and muscle potentials, and by …

WHEN we started our investigation of motility in the chick embryo several years ago, it was
our intention to correlate neurogenetic development with behavioural development, and …

The nature of the earliest movement of the vertebrate embryo is a disputed question. It
seems to be generally conceded that in amphibians and fishes it consists in a contraction of …

Adetailed analysis of the influence of bodily growth and environmental changes upon the
behavior of chick embryos. These factors always led to changes in behavior. For example …

The behavioral development of kittens was studied preparatory to correlating reactions with
the embryological development of the nervous system. 125 living embryos and fetuses taken …

In the past, the development of behavior in vertebrate embryos has been interpreted in terms
of two opposing viewpoints. Coghill, on the basis of his observations on the salamander …

In previous communications, I have paid tribute to Professor Wilhelm Preyer, to whom this
volume is dedicated. The importance of his theoretical and observational contributions to the …

This paper proposes (1) to summarize in a convenient and readable form the mass of data
concerning the physiological activities of the chick embryo which has accumulated during …