Marchi fixative

Mar·chi fix·a·tive

(mahr'kē),
a mixture of Müller fixative with osmium tetroxide; potassium chlorate is substituted for the potassium dichromate of Müller fixative for better results; used to demonstrate degenerating myelin.
See also: Marchi stain.

Mar·chi fix·a·tive

(mahr'kē fiks'ă-tiv)
A mixture of Müller fixative with osmium tetroxide, with potassium chlorate substituted for the potassium dichromate of the Müller fixative for better results; used to demonstrate degenerating myelin.
See also: Marchi stain

Marchi,

Vittorio, Italian physician, 1851-1908.
Marchi fixative - used to demonstrate degenerating myelin.
Marchi reaction - failure of the myelin sheath of a nerve to blacken when submitted to the action of osmic acid.
Marchi stain - a method for demonstrating fat and degenerating nerve fibers.
Marchi tract - a bundle of thick, heavily myelinated fibers originating in the deep layers of the superior colliculus. Synonym(s): tectospinal tract