This was in contrast to medullary cords uniting mostly with the cortical layer; spermogones commonly pale . The former was recognized by Phillip Rundel and Peter Bowler in 1978 as belonging to the genus " Niebla " that included species from Macaronesia that also had medullary cords free from the cortex.
42.
As in other sensory cortices, S1 neurons are grouped together with similar inputs and responses into vertical columns that extend across cortical layers ( e . g ., As shown by Vernon Mountcastle, into alternating layers of slowly adapting and rapidly adapting neurons; or spatial segmentation of the vibrissae on mouse / rat cerebral cortex ).
43.
Another modulatory factor is the corpus callosum, providing a direct inhibitory connection, interhemispherical, to the cortical layer VI, thus indirectly to layer V . As such, the halves of the brain exert some control over basal input of the other side, but can only inhibit due to the GABAergic nature of the corpus callosum.
