2 results for Anderson, C.

  • Biofortified fodder - an environmentally sustainable mechanism to supplement livestock with trace elements?

    Anderson, C.; Robinson, B.; West, D.; Clucas, L.; Portmann, D.

    Conference Contribution - Published
    Lincoln University

    New Zealand agriculture utilises trace element supplements to protect livestock from fungal infection. For example Zinc (as zinc oxide) administered as an oral drench or intraruminal bolus, is used extensively to protect sheep and cattle from facial eczema. A large percentage of administered Zn is however excreted in faeces and there is published evidence to show that Zn levels in pastoral soils are increasing with time. The long-term environmental affect of this ongoing Zn input to soil is unknown. In this paper we describe research into the efficacy of fodder with an elevated Zn concentration as a potential prophylaxis against facial eczema in sheep relative to a conventional drench. Our hypothesis is that Zn protection afforded by biofortified fodder may be realised at a relatively lower dose, thus limiting transfer of Zn into the pastoral environment. This may represent a more environmental sustainable mechanism to supplement livestock with trace elements than conventional options. Our mechanism of Zn administration can be described as the biofortification of food with essential trace elements.

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  • The Relationship Between Submental Surface Electromyography and Hyo-Laryngeal Kinematic Measures of Mendelsohn Maneuver Duration

    Azola, A.M.; Greene, L.R.; Taylor-Kamara, I.; Macrae, P.; Anderson, C.; Humbert, I. (2015)

    Journal Articles
    University of Canterbury Library

    Purpose: The Mendelsohn maneuver (MM) is a commonly prescribed technique that is taught to individuals with dysphagia to improve swallowing ability. Due to cost and safety concerns associated with videofluoroscopy (VFS) use, submental surface electromyography (ssEMG) is commonly used in place of VFS to train the MM in clinical and research settings. However it is unknown whether ssEMG accurately reflects the prolonged hyo-laryngeal movements required for execution of the MM. The primary goal of this study was to examine the relationship among ssEMG duration, duration of laryngeal vestibule closure, and duration of maximum hyoid elevation during MM performance. Method: Participants included healthy adults and patients with dysphagia due to stroke. All performed the MM during synchronous ssEMG and VFS recording. Results: Significant correlations between ssEMG duration and VFS measures of hyolaryngeal kinematic durations during MM performance ranged from very weak to moderate. None of the correlations in the group of stroke patients reached statistical significance. Conclusions: Clinicians and researchers should consider that the MM involves novel hyo-laryngeal kinematics that may be only moderately represented with ssEMG. Thus, there is a risk that these target therapeutic movements are not consistently being trained.

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