The electrical potentials produced by the chick embryo during its incubation period

✍ Scribed by Shumway, B. W. ;Sable, M. ;Bierman, H. R.

• Book ID: 102880365
• Publisher: Wiley (John Wiley & Sons)
• Year: 1953
• Tongue: English
• Weight: 639 KB
• Volume: 42
• Category: Article
• ISSN: 0095-9898
• DOI: 10.1002/jcp.1030420102

✦ Synopsis

Electrical field variations have been related to the growth or activity of various embryos. Herman arid voii Gendre in 1885 found that during the first 150 hours of incubation the chick embryo was always positive with respect to the white arid to the yolk. Their readings were of the eider of 1 mv. at 10 hours, 5 at 40 hours, a inaxiinuni of abont 10 a t 80 hours, 5 a t 120 liours, and approximately 2 a t 150 hours.

I-Iyde ('04) found "with few exceptions the direction of the current in the turtle egg was from the aiiinial toward the vegetative pole." She also found between the poles of Fiindzilus a n electrical potential that rhythmically hecarrie positive and negative and "might be compared with certain phases in the egg during the interval between fertilization and cleavage. "

Hyman and Bellarriy ('22) postulated that the steady state potential differences in organisms were due to differences of metabolic rate with the regions of high rates being more negative than those of lower rates.

Gayda ('25) found potentials in Biifo culgnris of the order of 20 to 30 iiiv. in the fertilized egg, 50 iiiv. just prior to hatch-1