Anatomy
Physio
Symptom
Tx
100
The radial nerve branches off this big nerve structure
ventral nerve roots of T1 of the brachial plexus (originates from C6-T2)
100
Nerves regenerate at this rate
1 inch/month
100
This common symptom of radial nerve paralysis is characterized by
Dropped elbow and inability to extend leg ("knuckling over")
100
To prevent further injury, this supportive measure is often used to help the horse stand and move.
A splint
200
The radial nerve can be injured at this anatomical location, often leading to radial nerve paralysis
Mid-humeral region
200
This type of muscle fiber is primarily affected by radial nerve paralysis, leading to muscle atrophy.
Skeletal muscle fibers
200
This visible sign in the forelimb muscles can be an indication of chronic nerve damage.
Muscle wasting/atrophy
200
Horses with radial nerve paralysis may benefit from this type of supplement to support nerve health.
Vitamin E!
300
What is the function of the radial nerve?
Innervates extensors of the elbow, carpus, and digits
300
In cases of nerve injury, this process involves the degeneration of the nerve distal to the site of injury.
Wallerian degeneration
300
How does a grade 4/5 lameness present in a horse?
Lameness is obvious at the walk.
300
Initial treatment often involves this basic intervention to reduce swelling and pain.
Anti-inflamatories
400
At the level of the elbow, this artery runs alongside the radial nerve.
Deep brachial artery
400
What can cause radial nerve damage?
hyperextension of the forelimb, excessive abduction of the shoulder, fractured humerus, and prolonged lateral recumbency
400
What position should you place a horse in lateral recumbency while under GA to reduce compression on the radial nerve?
front leg on the down side should be extended cranially to relieve pressure on triceps mass
400
What is the prognosis for a horse that shows improving voluntary movement of the affected limb and still has pain reception intact?
A good prognosis =)
500
The radial nerve sits in this structure of the humerus.
musculospiral groove of the humerus
500
Name 3 main prognostic indicators for radial nerve damage cases.
nociception (pain), voluntary movement of forelimb, ability to bear weight (must progress in the healing process)
500
Alongside the neuropathy from compression of the radial nerve, what other abnormality might occur with prolonged pressure on the should in lateral recumbency?
ischemia of the triceps musculature
500
What are the mg/kg doses for phenylbutazone?
2.2 mg/kg or 4.4 mg/kg