Term: spiny bipolar neuron

Definition: The most frequent neuronal type found in the (BST)Ju is a spiny bipolar cell that accounts for about 78% of the impregnated neurons. In sagittal sections, the dendritic arborization of these neurons corresponds to that of typical bipolar neurons; the paired primary dendrites run in opposite directions, generating narrow dendritic fields, as defined by Peters (1984) and Peters and Jones (1984), that extend through the dorsoventral extent of the Ju. The somata and proximal dendrites of bipolar neurons tend to be located within the middle one-third of the Ju, as depicted in horizontal sections.