Justin D. Perkins

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REASONS FOR PERFORMING STUDY Dental disease often presents a diagnostic challenge in the horse. Computed tomography (CT) is increasingly used in the evaluation of head related disease in the horse, but the CT appearance of the most common dental diseases of horses has not yet been fully described. OBJECTIVE To describe the CT appearance of the peripheral(More)
OBJECTIVE To report a technique for eye enucleation in standing sedated horses and to report outcome in 40 horses. STUDY DESIGN Retrospective study. ANIMALS Horses (n=40) requiring eye enucleation. METHODS The eye was enucleated using a transpalpebral technique in 40 horses restrained in stocks and sedated. Anesthesia of orbital structures was(More)
Skeletal muscle is composed of a heterogeneous mixture of several fibre types, each with specific physiological properties. In equine muscle, identification of these individual fibres (fibre typing) is important for both exercise physiology and pathological studies. Traditionally, fibre typing has been achieved by adenosine triphosphatase (ATPase)(More)
REASONS FOR PERFORMING STUDY Dental disorders are of major clinical importance in equine practice; however, the knowledge of normal dental anatomy, especially that of the pulp remains incomplete. Computed tomography (CT) is being used increasingly in the diagnosis of dental disease, although the normal 2- (2D) and 3-dimensional (3D) CT anatomy has not yet(More)
The effect of left-sided valvular regurgitation (LSVR) on the mortality of middle-aged and older horses was investigated in a prospective cohort study involving 19 yards and 1153 horses. The horses were examined to determine whether they had a cardiac murmur and its type, and their age, sex, breed type and occupation were recorded. They were followed up at(More)
Bilateral vocal fold paralysis (BVCP) is a life-threatening condition that follows injury to the Recurrent Laryngeal nerve (RLn) and denervation of the intrinsic laryngeal musculature. Functional electrical stimulation (FES) enables restoration and control of a wide variety of motor functions impaired by lower motor neuron lesions. Here we evaluate the(More)
The parasympathetic terminal cardiac ganglia were examined in three normal horses and in five horses with grass sickness. Histopathological changes, consistent with those observed in other ganglia of horses with grass sickness, were identified in the terminal cardiac ganglia of the affected horses. A functional analysis of cardiac autonomic control by time(More)
OBJECTIVE To determine whether ventriculocordectomy (VCE) performed before prosthetic laryngoplasty (PL) results in increased rima glottidis size compared with PL alone. STUDY DESIGN Experimental study. ANIMALS Equine cadaver larynges (n=13). METHODS Right arytenoid cartilages were maximally abducted using a standard PL technique. Standard PLs were(More)
OBJECTIVES To describe and evaluate the use of a transoral, endoscope-guided technique for transection of an entrapping epiglottic fold in sedated standing horses. STUDY DESIGN Retrospective study. ANIMALS Horses (n=16) with epiglottic fold entrapment (EFE). METHODS Medical records (2005-2006) of 16 horses with EFE were reviewed to determine history,(More)
OBJECTIVE To investigate the influence of simulated contraction of the cricoarytenoideus dorsalis (CAD) muscle on the 3-D motion of the arytenoid cartilage. SAMPLE POPULATION 5 larynges from equine cadavers. PROCEDURES Serial computed tomographic scans of each larynx were conducted at 7 incremental forces simulating contraction of medial, lateral, and(More)