a division of the neostriatal efferents into two functional cell systems is conceived , in which one efferent system , the spiny i cell matrix , is thought to be represented by a lateral inhibitory network comprised of the common spiny i neurons which inhibit their targets , while another is termed the spiny ii cell cluster and consists of the far less numerous excitatory efferents of neostriatum ( the spiny ii cells ) and is represented by clusters of neurons , the members of each cluster consisting of one excitatory efferent neuron and three interneurons .
C1383501
cell matrix
C0007634
cells