Term: common spiny neuron

Definition: The CSN is the most frequent cell type (44%) and short axon neuron found in the Ov (Fig. 8). Neurons classified as CSN are a heterogeneous group of spiny interneurons scattered throughout the core and, occasionally, the shell of the nucleus. This cell type bears strong similarities to the type described by MacDonald (1983) in "the lateral subdivision of the BST", which clearly corresponds to the Ov reported by Ju and Swanson (1989).