What is the main cause of microchatter?

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Multiple Choice

What is the main cause of microchatter?

Microchatter shows up when the tissue becomes too brittle to cut smoothly. The dehydration steps remove water from the tissue, and if the tissue stays in the dehydrating agents for too long (prolonged dehydration), it loses even more water and becomes hard and crinkly. When the microtome blade slices this overly dry, stiff tissue, it can’t shear cleanly, so tiny vibrations and irregular surface features—microchatter—appear on the cut surface. Other steps affect different issues: not clearing properly or under-dehydrating would lead to different artifacts related to transparency or wax infiltration, and over-dehydration is essentially the same concept but the phrasing “prolonged dehydration” emphasizes excessive drying over time, which is the primary driver of the brittleness causing chatter.

Microchatter shows up when the tissue becomes too brittle to cut smoothly. The dehydration steps remove water from the tissue, and if the tissue stays in the dehydrating agents for too long (prolonged dehydration), it loses even more water and becomes hard and crinkly. When the microtome blade slices this overly dry, stiff tissue, it can’t shear cleanly, so tiny vibrations and irregular surface features—microchatter—appear on the cut surface.

Other steps affect different issues: not clearing properly or under-dehydrating would lead to different artifacts related to transparency or wax infiltration, and over-dehydration is essentially the same concept but the phrasing “prolonged dehydration” emphasizes excessive drying over time, which is the primary driver of the brittleness causing chatter.

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