The use of electromyography including interference pattern analysis to determine muscle force of the deep digital flexor muscle in case of equine laminitis

L C Hardeman; B R van der Meij; W Back; J H van der Kolk; I D Wijnberg

doi:10.1111/evj.12486_36

The use of electromyography including interference pattern analysis to determine muscle force of the deep digital flexor muscle in case of equine laminitis

L C Hardeman, B R van der Meij, W Back, J H van der Kolk, I D Wijnberg

Research output: Contribution to journal › Meeting Abstract › Other research output

Abstract

REASONS FOR PERFORMING STUDY: In cases of laminitis, an increased muscle force or contracture of the deep digital flexor muscle (DDFM) is suggested, but evidence-based research is lacking.

OBJECTIVES: To test if the DDFM of laminitic equines shows an increased muscle force detectable by needle-EMG including Interference Pattern Analysis (IPA).

STUDY DESIGN: Cross-sectional study.

METHODS: Three groups consisted of Group 0 (control): 6 Royal Dutch Sport horses, 3 Shetland ponies and one Welsh pony (healthy, sound adults, mean ± s.d. weight 411 ± 217 kg). Group 1: 3 Royal Dutch Sport horses, one Friesian, one Haflinger, one Icelandic horse, 2 Welsh ponies, one miniature Appaloosa and 6 Shetland ponies (adults, mean ± s.d. weight 310 ± 172 kg) suffering from acute or chronic laminitis. EMG measurements including firing frequency (F) and IPA parameters Turns/Second (T), Amplitude/Turn (M) and Ratio M/T (R) were performed. ANOVA was used to analyse data. P values of P<0.05 were considered significant.

RESULTS: Mean ± s.d. F of Group 0 and Group 1 was 53 ± 11 and 72 ± 21 Hz, mean ± s.d. T was 112 ± 57 and 106 ± 42, mean ± s.d. M was 284 ± 51 and 254 ± 38 μV and mean ± s.d. R was 0.39 ± 0.17 and 0.42 ± 0.16%, respectively. The firing frequency of Group 1 was significantly higher compared to Group 0 (P = 0.02), whereas other differences were not significant.

CONCLUSIONS: In human medicine, an increased firing frequency is a characteristic of increased muscle force [1,2]. Thus, the increased firing frequency of the DDFM in case of laminitis suggests an elevated muscle force. As all parameters show a high variance, a repeated study including a larger test group is advised. Ethical animal research: Data collection from controls was approved by the Animal Welfare Committee of Utrecht University, approval number 2008.III.07.061 and 2013.III.01.012. Clinical cases were privately owned and written owner consent was obtained.

SOURCE OF FUNDING: None. Competing interests: None declared.

Original language	English
Pages (from-to)	16
Journal	Equine Veterinary Journal
Volume	47
Issue number	Suppl 48
DOIs	https://doi.org/10.1111/evj.12486_36
Publication status	Published - Sept 2015

Bibliographical note

Clinical Research Abstracts of the British Equine Veterinary Association Congress 2015

Keywords

laminitis, electomyography, muscle, clincial neurophysiology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1111/evj.12486_36

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@article{5f90319cb4fd43c2a83d86f56a2ad261,

title = "The use of electromyography including interference pattern analysis to determine muscle force of the deep digital flexor muscle in case of equine laminitis",

abstract = "REASONS FOR PERFORMING STUDY: In cases of laminitis, an increased muscle force or contracture of the deep digital flexor muscle (DDFM) is suggested, but evidence-based research is lacking.OBJECTIVES: To test if the DDFM of laminitic equines shows an increased muscle force detectable by needle-EMG including Interference Pattern Analysis (IPA).STUDY DESIGN: Cross-sectional study.METHODS: Three groups consisted of Group 0 (control): 6 Royal Dutch Sport horses, 3 Shetland ponies and one Welsh pony (healthy, sound adults, mean ± s.d. weight 411 ± 217 kg). Group 1: 3 Royal Dutch Sport horses, one Friesian, one Haflinger, one Icelandic horse, 2 Welsh ponies, one miniature Appaloosa and 6 Shetland ponies (adults, mean ± s.d. weight 310 ± 172 kg) suffering from acute or chronic laminitis. EMG measurements including firing frequency (F) and IPA parameters Turns/Second (T), Amplitude/Turn (M) and Ratio M/T (R) were performed. ANOVA was used to analyse data. P values of P<0.05 were considered significant.RESULTS: Mean ± s.d. F of Group 0 and Group 1 was 53 ± 11 and 72 ± 21 Hz, mean ± s.d. T was 112 ± 57 and 106 ± 42, mean ± s.d. M was 284 ± 51 and 254 ± 38 μV and mean ± s.d. R was 0.39 ± 0.17 and 0.42 ± 0.16%, respectively. The firing frequency of Group 1 was significantly higher compared to Group 0 (P = 0.02), whereas other differences were not significant.CONCLUSIONS: In human medicine, an increased firing frequency is a characteristic of increased muscle force [1,2]. Thus, the increased firing frequency of the DDFM in case of laminitis suggests an elevated muscle force. As all parameters show a high variance, a repeated study including a larger test group is advised. Ethical animal research: Data collection from controls was approved by the Animal Welfare Committee of Utrecht University, approval number 2008.III.07.061 and 2013.III.01.012. Clinical cases were privately owned and written owner consent was obtained.SOURCE OF FUNDING: None. Competing interests: None declared.",

keywords = "laminitis, electomyography, muscle, clincial neurophysiology",

author = "Hardeman, {L C} and {van der Meij}, {B R} and W Back and {van der Kolk}, {J H} and Wijnberg, {I D}",

note = "Clinical Research Abstracts of the British Equine Veterinary Association Congress 2015",

year = "2015",

month = sep,

doi = "10.1111/evj.12486_36",

language = "English",

volume = "47",

pages = "16",

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T1 - The use of electromyography including interference pattern analysis to determine muscle force of the deep digital flexor muscle in case of equine laminitis

AU - Hardeman, L C

AU - van der Meij, B R

AU - Back, W

AU - van der Kolk, J H

AU - Wijnberg, I D

N1 - Clinical Research Abstracts of the British Equine Veterinary Association Congress 2015

PY - 2015/9

Y1 - 2015/9

N2 - REASONS FOR PERFORMING STUDY: In cases of laminitis, an increased muscle force or contracture of the deep digital flexor muscle (DDFM) is suggested, but evidence-based research is lacking.OBJECTIVES: To test if the DDFM of laminitic equines shows an increased muscle force detectable by needle-EMG including Interference Pattern Analysis (IPA).STUDY DESIGN: Cross-sectional study.METHODS: Three groups consisted of Group 0 (control): 6 Royal Dutch Sport horses, 3 Shetland ponies and one Welsh pony (healthy, sound adults, mean ± s.d. weight 411 ± 217 kg). Group 1: 3 Royal Dutch Sport horses, one Friesian, one Haflinger, one Icelandic horse, 2 Welsh ponies, one miniature Appaloosa and 6 Shetland ponies (adults, mean ± s.d. weight 310 ± 172 kg) suffering from acute or chronic laminitis. EMG measurements including firing frequency (F) and IPA parameters Turns/Second (T), Amplitude/Turn (M) and Ratio M/T (R) were performed. ANOVA was used to analyse data. P values of P<0.05 were considered significant.RESULTS: Mean ± s.d. F of Group 0 and Group 1 was 53 ± 11 and 72 ± 21 Hz, mean ± s.d. T was 112 ± 57 and 106 ± 42, mean ± s.d. M was 284 ± 51 and 254 ± 38 μV and mean ± s.d. R was 0.39 ± 0.17 and 0.42 ± 0.16%, respectively. The firing frequency of Group 1 was significantly higher compared to Group 0 (P = 0.02), whereas other differences were not significant.CONCLUSIONS: In human medicine, an increased firing frequency is a characteristic of increased muscle force [1,2]. Thus, the increased firing frequency of the DDFM in case of laminitis suggests an elevated muscle force. As all parameters show a high variance, a repeated study including a larger test group is advised. Ethical animal research: Data collection from controls was approved by the Animal Welfare Committee of Utrecht University, approval number 2008.III.07.061 and 2013.III.01.012. Clinical cases were privately owned and written owner consent was obtained.SOURCE OF FUNDING: None. Competing interests: None declared.

AB - REASONS FOR PERFORMING STUDY: In cases of laminitis, an increased muscle force or contracture of the deep digital flexor muscle (DDFM) is suggested, but evidence-based research is lacking.OBJECTIVES: To test if the DDFM of laminitic equines shows an increased muscle force detectable by needle-EMG including Interference Pattern Analysis (IPA).STUDY DESIGN: Cross-sectional study.METHODS: Three groups consisted of Group 0 (control): 6 Royal Dutch Sport horses, 3 Shetland ponies and one Welsh pony (healthy, sound adults, mean ± s.d. weight 411 ± 217 kg). Group 1: 3 Royal Dutch Sport horses, one Friesian, one Haflinger, one Icelandic horse, 2 Welsh ponies, one miniature Appaloosa and 6 Shetland ponies (adults, mean ± s.d. weight 310 ± 172 kg) suffering from acute or chronic laminitis. EMG measurements including firing frequency (F) and IPA parameters Turns/Second (T), Amplitude/Turn (M) and Ratio M/T (R) were performed. ANOVA was used to analyse data. P values of P<0.05 were considered significant.RESULTS: Mean ± s.d. F of Group 0 and Group 1 was 53 ± 11 and 72 ± 21 Hz, mean ± s.d. T was 112 ± 57 and 106 ± 42, mean ± s.d. M was 284 ± 51 and 254 ± 38 μV and mean ± s.d. R was 0.39 ± 0.17 and 0.42 ± 0.16%, respectively. The firing frequency of Group 1 was significantly higher compared to Group 0 (P = 0.02), whereas other differences were not significant.CONCLUSIONS: In human medicine, an increased firing frequency is a characteristic of increased muscle force [1,2]. Thus, the increased firing frequency of the DDFM in case of laminitis suggests an elevated muscle force. As all parameters show a high variance, a repeated study including a larger test group is advised. Ethical animal research: Data collection from controls was approved by the Animal Welfare Committee of Utrecht University, approval number 2008.III.07.061 and 2013.III.01.012. Clinical cases were privately owned and written owner consent was obtained.SOURCE OF FUNDING: None. Competing interests: None declared.

KW - laminitis, electomyography, muscle, clincial neurophysiology

U2 - 10.1111/evj.12486_36

DO - 10.1111/evj.12486_36

M3 - Meeting Abstract

C2 - 26375878

SN - 0425-1644

VL - 47

SP - 16

JO - Equine Veterinary Journal

JF - Equine Veterinary Journal

IS - Suppl 48

ER -

The use of electromyography including interference pattern analysis to determine muscle force of the deep digital flexor muscle in case of equine laminitis

Abstract

Bibliographical note

Keywords

UN SDGs

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