Contracture of spinatus muscle
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Introduction
- Usually seen in working or very active animals.
- Cause : ?trauma - progressive lameness sometimes reported to be following previous acute onset lameness.
- Signs : non-painful lameness.
- decreased flexion of joint/atrophy of suprascapular muscles.
- Treatment : tenectomy of affected tendon.
- Prognosis : good following surgery.
Diagnosis
Clinical signs
- Characteristic stance: chronic cases - limb held slightly adducted at elbow with abduction of foot.
- Characteristic gait at walk or trot: obvious circumduction of limb on protraction and flip-like extension of paw as limb moves forward.
- Reduced flexion of joint.
- Antebrachium tends to deviate laterally from body instead of remaining in a straight line when whole limb is flexed up.
- Atrophy of suprascapular muscles (infraspinatus involved more commonly than supraspinatus) with or without other shoulder muscles.
Sequelae
Prognosis
- Good following surgery - normal movement of joint should be restored immediately.
- No recurrences have been recorded.
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