ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1991.tb02721.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1991.tb02722.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1991.tb02723.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1991.tb02724.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1991.tb02725.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

SummaryCase records of horses with muscle disorders presenting to the Veterinary Medical Teaching Hospital of the University of California, Davis, over a nine year period were evaluated. The objectives of the review were to identify the common myogenic muscle problems and their clinical features. Muscle disease of idiopathic aetiology following exercise was by far the most common condition noted. Other causes of myogenic muscle disorders included congenital, infectious, immune‐mediated and nutritional factor

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1991.tb02726.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

SummaryMuscle biopsies were taken from the middle gluteal muscle of 68 stallions (52 Andalusian [AN] and 16 Arab [AR]) ranging from six to 12 years of age. Seventeen AN horses and eight AR horses were untrained, while the remainder underwent active endurance training for 6 months. Fifteen AN horses were moderately endurance‐trained while the other 20 AN horses and eight AR horses were strongly endurance‐trained. Percentages of type I and type II fibres were similar in all groups (P>0.05). The group of horses with the hardest training had a higher percentage of type HA fibres (AN P<0. 01; AR P<0.02) and a lower percentage of type IIB fibres (P<0.05 for AN and AR) than the untrained horses. All trained horses had a higher percentage of type IIB oxidative fibres and a lower percentage of type IIB non‐oxidative fibres than the untrained horses (P<0.01 for both). These results suggest that the proportions of type I and type II fibres are highly stable within a given breed, but the stimulus of training facilitates changes both in contractile properties and, particularly, in the oxidative capacity of type II subg

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1991.tb02727.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

SummaryThe laryngeal muscles of 18 horses were examined histologically. The neurogenic changes found in each muscle were scored by four reviewers and the results evaluated statistically. Fifteen of these horses had endoscopic evidence of abnormal laryngeal function, three of which were defined as having adductor paralysis. Measurement of muscle fibre area in two horses with idiopathic laryngeal hemiplegia (ILH) was performed. In the quantitative study of neurogenic change, the adductor muscles were more significantly affected than the abductor muscle. This was also true in the clinical cases of ILH where measurement of muscle Fibre area demonstrated that the lateral cricoarytenoid (adductor) muscle showed a wider range of pathological changes than the dorsal cricoarytenoid muscle (abductor). Those horses with the most severe muscle pathology also had the most abnormal endoscopic findings. The propensity for denervation of the adductor muscles should provide clues as to the pathogenesis and natural history of horses with sub‐clinical laryngeal disease and IL

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1991.tb02728.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

SummaryThe terminal branches of the recurrent laryngeal nerve (RLN) of three normal ponies and six horses with sub‐clinical laryngeal disease were examined qualitatively and quantitatively in an attempt to explain the preferential denervation of the laryngeal adductor muscles in the neuropathy of idiopathic laryngeal hemiplegia (ILH). The myelinated fibre spectra of all the motor nerve fibres in the left and right abductor and adductor branches of the RLN in three normal ponies were measured. The density of myelinated fibres was also calculated. There was no significant difference between the larger group of myelinated fibres in the adductor or abductor branches. In the six horses with laryngeal hemiparesis, however, there was a marked preferential loss of the medium/large size myelinated fibres in the left adductor branch, although nerve fibre densities were not significantly different. While no simple morphometrical feature was found to explain the selective muscle denervation, the greater loss of large diameter myelinated fibres in the adductor branches confirms the earlier observation of adductor muscle susceptibility in the neuropathy of IL

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1991.tb02729.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

ISSN:0425-1644    

DOI:10.1111/j.2042-3306.1991.tb02730.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY