The grain cell layer, the inner layer of the cerebellar cortex
, is 400-500 μm thick. It contains an astonishingly large amount - 40-50(100??) billion - mkt. Small nerve cells, so-called grain
cells, i.e. just over twice as many nerve cells as the cerebral cortex
is estimated to contain. The layer additionally contains unipolar brush cells
cell bodies and Golgi cell
bodies with an extraordinarily rich branched axon branch.