Figure 5From: Heavy metals in locus ceruleus and motor neurons in motor neuron disease Heavy metal staining in MND brain stem and cortical motor neurons. (A) Light AMG staining is present within the lipofuscin of three hypoglossal motor neurons. Bar = 15 μm. (B) These two nucleus ambiguus neurons contain light AMG staining. Bar = 20 μm. (C) Light AMG staining is seen within the lipofuscin of a trochlear nucleus neuron. Bar = 25 μm. (D) A shrunken cortical motor neuron (Betz cell, arrow) contains no AMG grains. Bar = 15 μm. AMG and hematoxylin.Back to article page