The distal forelimbs of 10 clinically normal horses with hair clipped on 1 limb were thermographically scanned before and after exercise. The thermal patterns, temperature distribution, and temperature changes after exercise were determined and compared with those of 8 horses with podotrochlosis. Clipping the hair did not cause changes in the thermal patterns, but the clipped limbs were warmer than the unclipped limbs. The temperature of the limbs of horses with podotrochlosis did not increase as much after exercise as did the limbs of normal horses. The failure of skin temperature increase correlated with the radiographic evidence of enlarged vascular foramina in the navicular bone. Because the failure to increase skin temperature after exercise is the result of low blood flow, the enlarged vascular foramen can be related to a state of low blood flow.
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Fine mapping a quantitative trait locus on horse chromosome 2 associated with radiological signs of navicular disease in Hanoverian warmblood horses.
Anim Genet
December 2009
Institute for Animal Breeding and Genetics, University of Veterinary Medicine Hannover, Bünteweg 17p, 30559 Hannover, Germany.
Navicular disease or podotrochlosis is one of the main causes of progressive forelimb lameness in warmblood horses. The objective of this study was to refine a quantitative trait locus on horse chromosome 2 for radiological alterations in the contour of the navicular bone (RAC) in Hanoverian warmblood horses. Genotyping was performed in 192 Hanoverian warmblood horses from 17 paternal half-sib groups.
View Article and Find Full Text PDFReview of genetic aspects of radiological alterations in the navicular bone of the horse.
Dtsch Tierarztl Wochenschr
November 2007
Institute for Animal Breeding and Genetics, University of Veterinary Medicine Hannover, Germany.
Navicular disease or podotrochlosis has long been known to cause forelimb lameness in horses. It had been proposed that the development of podotrochlosis has similarities to the human osteoarthritis (OA) complex. Alterations of the navicular bone can be made visible early in life only on the basis of radiographs.
View Article and Find Full Text PDF[Radiologic follow-up examination of podotrochlosis].
Tierarztl Prax
February 1995
Klinik für Pferde, Allgemeine Chirurgie und Radiologie, Freien Universität Berlin.
X-rays of 205 horses having navicular disease and having been reexamined up to six times are evaluated. For this, the x-rays of each foreleg are evaluated in the dorsopalmar (Oxspring) and lateromedial view. Additionally to changes of the navicular bone, changes of the distal part of the toe are also assessed.
View Article and Find Full Text PDF[Scanning electron microscopic findings of the navicular bone and deep flexor tendon in podotrochlosis of horses].
Dtsch Tierarztl Wochenschr
June 1992
Institut für Pathologie, Tierärztlichen Hochschule Hannover.
In 25 adult horses the podotrochlea of 49 forelimbs was examined by means of light and electron microscopy in order to correlate clinical and morphological findings. According to the clinical diagnosis the animals were divided into three groups: lameness due to syndrome of podotrochlosis (group 1) or due to tendopathy (group 2) and horses without lameness (group 3). The most striking pathological findings of the navicular bone and the opposite surface of the deep flexor tendon were found in horses with podotrochlosis, consisting of loss of cartilage and tendon matrix with denudation of collagen fibrils, superficial degeneration and necrosis, focal occurrence of fissures and far-reaching defects, sometimes accompanied by adhesions between tendon and navicular bone surface.
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Berl Munch Tierarztl Wochenschr
February 1986
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