Most neurons in the central nervous systems of invertebrates, including insects, are unipolar.

[2] The cell bodies of invertebrate unipolar neurons are often located around the edges of the neuropil, in the so-called cell-body rind.

[4] In multipolar neurons, multiple processes extend from the cell body including dendrites and axons.

A third morphological class, bipolar neurons, extend just one axon and dendritic process from the cell body.

Sensory neurons with cell bodies in the dorsal root ganglia of the vertebrate spinal cord are pseudo-unipolar: one branch projects to the periphery (to sensory receptors in the skin, joints, and muscle), the other to the spinal cord.