Cineradiographic studies of gastric motility in turkeys

Abstract

The APS Journal Legacy Content is the corpus of 100 years of historical scientific research from the American Physiological Society research journals. This package goes back to the first issue of each of the APS journals including the American Journal of Physiology, first published in 1898. The full text scanned images of the printed pages are easily searchable. Downloads quickly in PDF format.

Alimentary Canal: Anatomy, Regulation of Feeding, and Motility

“…They have been observed to occur about every 15-20 min while recording normal gastroduodenal motility in turkeys (Duke et al, 1972a;Dziuk and Duke, 1972). This function appears to be unique to birds.…”

“…In most species, this organ is composed of rwo pairs of opposing muscles (Figure 11-1) termed the thin and thick muscle pairs (Dziuk and Duke, 1972). All four muscles consist almost entirely of circular smooth muscle arising from a central aponeurosis.…”

“…Gizzard contractions cause small IP changes in the proventriculus prior to each proventricular contraction wave. Very small changes in thoracoabdominal pressure due to respira- (Mangold, 1950;Duke et al, 1972a;Dziuk and Duke, 1972). Contractions of the gizzard, proventriculus, and duodenum are normally totally coordinated in a gastroduodenal sequence (Figure 11-3), which begins with contraction of the thin muscles followed by the duodenum, thick muscles, and proventriculus, respectively ( Figure 11-4).…”

Muscular architecture and VIP-like immunoreactive nerves in the gastroduodenal junction of the chicken

“…In the turkey, a cineradiographic study of the gastroduodenal complex revealed rhythmic contraction and coordinated closing of the pyloric part (Dziuk and Duke, 1972). Furthermore, reflux of ingesta from the duodenum and the upper jejunum into the gizzard has been recorded in both chickens (Oguro and Ikeda, 1974) and turkeys (Dziuk and Duke, 1972).…”

“…Furthermore, reflux of ingesta from the duodenum and the upper jejunum into the gizzard has been recorded in both chickens (Oguro and Ikeda, 1974) and turkeys (Dziuk and Duke, 1972). Thus, there would seem to be a muscular mechanism for opening and closing the pyloric part in birds.…”