A study of the growth of a portion of the spinal cord following its early isolation from the central nervous system in the chick embryo

✍ Scribed by Roy G. Williams

• Publisher: John Wiley and Sons
• Year: 1931
• Tongue: English
• Weight: 830 KB
• Volume: 52
• Category: Article
• ISSN: 0021-9967
• DOI: 10.1002/cne.900520204

✦ Synopsis

The factors responsible during development f o r the subsequent morphology and function of the central nervous system have been much investigated both in phylogeny and by means of experimental methods on tissue cultures and on lower forms of animals. As a result of these researches the processes underlying nervous morphogenesis are much clearer. F r o m phylogenetic studies Kappers has been able to formulate his law of neurobiotaxis and has lately ('28) shown that this fundamental law governing the structure of the nervous system is analogous with one of the principle laws of psychology, the law of association. Observations and experiments in support of this work have been contributed by Bok ('15 and '17), Ingvar ( '20)' Krans and Weil (quoted by Kappers, 'as), and others.

That there are very early factors governing structure is indicated by the work of Speman and Rfangold ('24) on the