Limits...
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.

Show MeSH
Landmarks for measuring nerve lengths 1, 2 and forelimb length. Solid circles,landmarks. Solid line measured from body surface using a soft and flexible measuringtape. Nerve length was measured in neutral position (a, b). Forelimb length wasmeasured at extended position (c). a, Nerve length 1; b, nerve length 2; c, forelimblength. AS, acromion of scapula; CAS, cranial angle of scapula; D, tip of third digit;O, olecranon; SP, stimulus point; SPTV, spinous process of first thoracicvertebra.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4300375&req=5

fig_001: Landmarks for measuring nerve lengths 1, 2 and forelimb length. Solid circles,landmarks. Solid line measured from body surface using a soft and flexible measuringtape. Nerve length was measured in neutral position (a, b). Forelimb length wasmeasured at extended position (c). a, Nerve length 1; b, nerve length 2; c, forelimblength. AS, acromion of scapula; CAS, cranial angle of scapula; D, tip of third digit;O, olecranon; SP, stimulus point; SPTV, spinous process of first thoracicvertebra.

Mentions: The length (mm) of the nerve was measured at the body surface using a soft, flexiblemeasuring tape. Anesthetized dogs were placed in the left lateral recumbent position in astate of muscular relaxation. The F-waves of the arms in humans are measured between astimulating point and the spinous process of the seventh cervical vertebra. The ulnar nervein dogs originates mainly from the eighth cervical and first thoracic nerves, and runs tothe carpal region [2]. Therefore, we selected thecranial border of the spinous process of the first thoracic vertebra as a landmark. Wemeasured the surface distance from the stimulus point to the cranial border of the spinousprocess of the first thoracic vertebra through the olecranon and the acromion of the scapula(nerve length 1; Fig. 1aFig. 1.


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)

Landmarks for measuring nerve lengths 1, 2 and forelimb length. Solid circles,landmarks. Solid line measured from body surface using a soft and flexible measuringtape. Nerve length was measured in neutral position (a, b). Forelimb length wasmeasured at extended position (c). a, Nerve length 1; b, nerve length 2; c, forelimblength. AS, acromion of scapula; CAS, cranial angle of scapula; D, tip of third digit;O, olecranon; SP, stimulus point; SPTV, spinous process of first thoracicvertebra.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig_001: Landmarks for measuring nerve lengths 1, 2 and forelimb length. Solid circles,landmarks. Solid line measured from body surface using a soft and flexible measuringtape. Nerve length was measured in neutral position (a, b). Forelimb length wasmeasured at extended position (c). a, Nerve length 1; b, nerve length 2; c, forelimblength. AS, acromion of scapula; CAS, cranial angle of scapula; D, tip of third digit;O, olecranon; SP, stimulus point; SPTV, spinous process of first thoracicvertebra.
Mentions: The length (mm) of the nerve was measured at the body surface using a soft, flexiblemeasuring tape. Anesthetized dogs were placed in the left lateral recumbent position in astate of muscular relaxation. The F-waves of the arms in humans are measured between astimulating point and the spinous process of the seventh cervical vertebra. The ulnar nervein dogs originates mainly from the eighth cervical and first thoracic nerves, and runs tothe carpal region [2]. Therefore, we selected thecranial border of the spinous process of the first thoracic vertebra as a landmark. Wemeasured the surface distance from the stimulus point to the cranial border of the spinousprocess of the first thoracic vertebra through the olecranon and the acromion of the scapula(nerve length 1; Fig. 1aFig. 1.

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