Outermost is the bone part, inner is the yellow region divided by white matter (outer, with mylination axons fibers) and gray matter (inside, composed by cell body). The only exception is the sensory neurons (here the peripheral sensory ne…

The cortico-motoneuronal (CM) [I think it is a subset or alternative of corticospinal tract, CST] system is unique to dexterous primates. It provides a direct pathway from motor cortex to the alpha motoneuron (a special neuron type reside …

We use lamina instead layer to decribe section of spinal cord. Ten layers of grey matter (I–X), identified in the early 1950s by Bror Rexed to label portions of the grey columns of the spinal cord. Pretty similar to 6 layers in cortex, whi…

Classically, three broad classes of projection neurons have been described for cortical excitatory neurons (Harris and Shepherd, 2015). Corticothalamic neurons project to the thalamus, their cell bodies occupy layer VI, and they express th…