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Establishment of a method to measure length of the ulnar nerve and standardize F-wave values in clinically normal beagles.

Hirasawa S, Shimizu M, Marui Y, Kishimoto M, Okuno S - J. Vet. Med. Sci. (2014)

Bottom Line: Nerve length 2 generated the highest value.Furthermore, the anterior horn of the scapula was easily palpated in any dog regardless of well-fed body.We concluded that nerve length 2 was optimal for measuring the length of the ulnar nerve.

View Article: PubMed Central - PubMed

Affiliation: Department of Veterinary Diagnostic Imaging, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan.

ABSTRACT
We designed a new method of measuring the length of the ulnar nerve and determining standard values for F-wave parameters of the ulnar nerve in clinically normal beagles. Nerve length must be precisely measured to determine F-wave latency and conduction velocity. The length of the forelimb has served as the length of the ulnar nerve for F-wave assessments, but report indicates that F-wave latency is proportional to the length of the pathway traveled by nerve impulses. Therefore, we measured the surface distance from a stimulus point to the spinous process of the first thoracic vertebra (nerve length 1) and the anterior horn of the scapula (nerve length 2) as landmarks through the olecranon and the shoulder blade acromion. The correlation coefficients between the shortest F-wave latency and the length of nerves 1, 2 or the forelimb were 0.61, 0.7 and 0.58. Nerve length 2 generated the highest value. Furthermore, the anterior horn of the scapula was easily palpated in any dog regardless of well-fed body. We concluded that nerve length 2 was optimal for measuring the length of the ulnar nerve.

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Bland-Altman comparison. Differences between lengths of (a) nerves 1 and 2 andbetween lengths of (b) forelimb and nerve 2. Solid circles, values from one dog.
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fig_006: Bland-Altman comparison. Differences between lengths of (a) nerves 1 and 2 andbetween lengths of (b) forelimb and nerve 2. Solid circles, values from one dog.

Mentions: The results of the Bland-Altman comparison indicated that nerve length 1 and forelimblength overestimated conduction distance compared with nerve length 2 (Fig. 6Fig. 6.


Establishment of a method to measure length of the ulnar nerve and standardize F-wave values in clinically normal beagles.

Hirasawa S, Shimizu M, Marui Y, Kishimoto M, Okuno S - J. Vet. Med. Sci. (2014)

Bland-Altman comparison. Differences between lengths of (a) nerves 1 and 2 andbetween lengths of (b) forelimb and nerve 2. Solid circles, values from one dog.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4300375&req=5

fig_006: Bland-Altman comparison. Differences between lengths of (a) nerves 1 and 2 andbetween lengths of (b) forelimb and nerve 2. Solid circles, values from one dog.
Mentions: The results of the Bland-Altman comparison indicated that nerve length 1 and forelimblength overestimated conduction distance compared with nerve length 2 (Fig. 6Fig. 6.

Bottom Line: Nerve length 2 generated the highest value.Furthermore, the anterior horn of the scapula was easily palpated in any dog regardless of well-fed body.We concluded that nerve length 2 was optimal for measuring the length of the ulnar nerve.

View Article: PubMed Central - PubMed

Affiliation: Department of Veterinary Diagnostic Imaging, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan.

ABSTRACT
We designed a new method of measuring the length of the ulnar nerve and determining standard values for F-wave parameters of the ulnar nerve in clinically normal beagles. Nerve length must be precisely measured to determine F-wave latency and conduction velocity. The length of the forelimb has served as the length of the ulnar nerve for F-wave assessments, but report indicates that F-wave latency is proportional to the length of the pathway traveled by nerve impulses. Therefore, we measured the surface distance from a stimulus point to the spinous process of the first thoracic vertebra (nerve length 1) and the anterior horn of the scapula (nerve length 2) as landmarks through the olecranon and the shoulder blade acromion. The correlation coefficients between the shortest F-wave latency and the length of nerves 1, 2 or the forelimb were 0.61, 0.7 and 0.58. Nerve length 2 generated the highest value. Furthermore, the anterior horn of the scapula was easily palpated in any dog regardless of well-fed body. We concluded that nerve length 2 was optimal for measuring the length of the ulnar nerve.

Show MeSH