Abstract
Background: Trigeminal-mediated headshaking results from low-threshold firing of the trigeminal nerve resulting in apparent facial pain. Magnesium may have neuroprotective effects on nerve firing that potentially dampen signs of neuropathic pain. This hypothesis has not been investigated in horses with trigeminal-mediated headshaking. Objective: To investigate head-shaking behavior in affected horses after IV magnesium sulfate infusion. Animals: Six geldings with trigeminal-mediated headshaking. Methods: Prospective randomized crossover study. Horses were controlled for diet and infused IV with 5% dextrose solution (DS; control solution at 2 mL/kg body weight [BW]) and MgSO4 50% solution (MSS at 40 mg/kg BW). Head-shaking behavior was recorded at times T0 (baseline, before infusion) and T15, T30, T60, and T120 minutes post-infusion. Venous blood variables such as pH, HCO3 −, standard base excess (SBE), Na+, Cl−, K+, Ca2+, Mg2+, total magnesium (tMg), glucose, and lactate were measured; strong ion difference (SID) and anion gap (AG) were calculated for each time point. Results: Blood variables including pH, Na+, Cl−, K+, SID, AG, lactate, Ca2+, tMg, and Mg2+ had significant changes with MSS as compared to DS treatment. Glucose, SBE, and HCO3 − did not have significant changes. A 29% reduction in head-shaking rate occurred after MSS treatment but no change occurred after DS treatment. Conclusions and Clinical Importance: Administration of MSS IV increased plasma total and ionized magnesium concentrations and significantly decreased head-shaking behavior in horses with trigeminal-mediated headshaking.
| Original language | English (US) |
|---|---|
| Journal | Journal of Veterinary Internal Medicine |
| DOIs | |
| State | Accepted/In press - Jan 1 2019 |
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Keywords
- equine
- head shakers
- magnesium
- trigeminal
ASJC Scopus subject areas
- veterinary(all)
Cite this
Intravenous infusion of magnesium sulfate and its effect on horses with trigeminal-mediated headshaking. / Sheldon, Shara A.; Aleman, Monica R; Costa, Lais Rosa R.; Santoyo, Ana C.; Howey, Quinn; Madigan, John E.
In: Journal of Veterinary Internal Medicine, 01.01.2019.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Intravenous infusion of magnesium sulfate and its effect on horses with trigeminal-mediated headshaking
AU - Sheldon, Shara A.
AU - Aleman, Monica R
AU - Costa, Lais Rosa R.
AU - Santoyo, Ana C.
AU - Howey, Quinn
AU - Madigan, John E
PY - 2019/1/1
Y1 - 2019/1/1
N2 - Background: Trigeminal-mediated headshaking results from low-threshold firing of the trigeminal nerve resulting in apparent facial pain. Magnesium may have neuroprotective effects on nerve firing that potentially dampen signs of neuropathic pain. This hypothesis has not been investigated in horses with trigeminal-mediated headshaking. Objective: To investigate head-shaking behavior in affected horses after IV magnesium sulfate infusion. Animals: Six geldings with trigeminal-mediated headshaking. Methods: Prospective randomized crossover study. Horses were controlled for diet and infused IV with 5% dextrose solution (DS; control solution at 2 mL/kg body weight [BW]) and MgSO4 50% solution (MSS at 40 mg/kg BW). Head-shaking behavior was recorded at times T0 (baseline, before infusion) and T15, T30, T60, and T120 minutes post-infusion. Venous blood variables such as pH, HCO3 −, standard base excess (SBE), Na+, Cl−, K+, Ca2+, Mg2+, total magnesium (tMg), glucose, and lactate were measured; strong ion difference (SID) and anion gap (AG) were calculated for each time point. Results: Blood variables including pH, Na+, Cl−, K+, SID, AG, lactate, Ca2+, tMg, and Mg2+ had significant changes with MSS as compared to DS treatment. Glucose, SBE, and HCO3 − did not have significant changes. A 29% reduction in head-shaking rate occurred after MSS treatment but no change occurred after DS treatment. Conclusions and Clinical Importance: Administration of MSS IV increased plasma total and ionized magnesium concentrations and significantly decreased head-shaking behavior in horses with trigeminal-mediated headshaking.
AB - Background: Trigeminal-mediated headshaking results from low-threshold firing of the trigeminal nerve resulting in apparent facial pain. Magnesium may have neuroprotective effects on nerve firing that potentially dampen signs of neuropathic pain. This hypothesis has not been investigated in horses with trigeminal-mediated headshaking. Objective: To investigate head-shaking behavior in affected horses after IV magnesium sulfate infusion. Animals: Six geldings with trigeminal-mediated headshaking. Methods: Prospective randomized crossover study. Horses were controlled for diet and infused IV with 5% dextrose solution (DS; control solution at 2 mL/kg body weight [BW]) and MgSO4 50% solution (MSS at 40 mg/kg BW). Head-shaking behavior was recorded at times T0 (baseline, before infusion) and T15, T30, T60, and T120 minutes post-infusion. Venous blood variables such as pH, HCO3 −, standard base excess (SBE), Na+, Cl−, K+, Ca2+, Mg2+, total magnesium (tMg), glucose, and lactate were measured; strong ion difference (SID) and anion gap (AG) were calculated for each time point. Results: Blood variables including pH, Na+, Cl−, K+, SID, AG, lactate, Ca2+, tMg, and Mg2+ had significant changes with MSS as compared to DS treatment. Glucose, SBE, and HCO3 − did not have significant changes. A 29% reduction in head-shaking rate occurred after MSS treatment but no change occurred after DS treatment. Conclusions and Clinical Importance: Administration of MSS IV increased plasma total and ionized magnesium concentrations and significantly decreased head-shaking behavior in horses with trigeminal-mediated headshaking.
KW - equine
KW - head shakers
KW - magnesium
KW - trigeminal
UR - http://www.scopus.com/inward/record.url?scp=85060337529&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85060337529&partnerID=8YFLogxK
U2 - 10.1111/jvim.15410
DO - 10.1111/jvim.15410
M3 - Article
C2 - 30666732
AN - SCOPUS:85060337529
JO - Journal of Veterinary Internal Medicine
JF - Journal of Veterinary Internal Medicine
SN - 0891-6640
ER -