Hemorrhagic myelopathy or myelomalacia is an uncommon cause of failure
to stand after general anesthesia. Affected horses are usually young
and have been anesthetized for relatively short times in dorsal recumb
ency. Clinical signs involve the hind limbs and include loss of deep p
ain perception. Etiology of this condition is not known. Differentiati
on from other forms of neuropathy and myopathy is important to the pro
gnosis.