In the 1920s and 1930s, the theoretical ideas concerning embryonic behavior were
polarized in two schools of thought: Coghill, on the basis of his pioneer studies of the motility …

Publisher Summary This chapter presents an introduction to behavioral embryology. The
overriding background theme in behavioral involves the role of functional factors—sensory …

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 …

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 the genesis of motor functions I intend to consider the subject critically and mainly in
terms of recent investigations. It is not my purpose to write a comprehensive review. I shall …

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 …

The behavior of embryos has attracted the attention of biologists for a long time. William
Harvey recorded important observations on the movements of the chick embryo. With the …

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 …

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 …

A critical review of the anatomical and physiological basis for the total pattern and local
reflex theories of development of behavior. Anatomical evidence from the embryonic …