Myopathies

Question 1

Which muscles often suffer from fibrotic myopathy?

Answer 1

Semitendinosus, semimembranous (mostly)
biceps femoris and gracilis muscles (rare)

Question 2

What happens in fibrotic myopathy?

Answer 2

Semitendinosus and semimembranous ms are suffering from trauma, leading to forming scar tissue replacing soft muscle tissues

Question 3

What is the affected nerve in a horse suffering from sweeney?

Answer 3

Suprascapular nerve

Question 4

What do you know about suprascapular neuropathy in horses?

Answer 4

neurogenic atrophy of supraspinatus and infraspinatus muscles caused by trauma affecting suprascapular nerve, leading prominent scapular spine

Question 5

Stringhalt (equine reflex hypertonia) is an exaggerated upward flexion of hindlimbs, what are the 2 types of stringhalt?

Answer 5

1- acquired stringhalt: caused by lathyrism (sweet pea poisoning) in USA or flat weed (false dandelion or catsear. this type almost always affect both haindlimbs
2- idiopathic stringhalt can affect more hindlimb than the other