Regаrding the hоrizоntаl structure оf the neocortex: (а) (1) Which layer receives specific inputs from the thalamus? (b) (1) Where do the cells in (a) project to? (c) (1) Which layer contains the apical dendritic tufts of pyramidal cells? (d) (4) Which layers are referred to as associational, and why? What are their connections? (e) (1) From which layer do pyramidal cells project axons to the brainstem or spinal cord?