| Namespace | MPheno.ontology | Obsolete | false |
| description | any structural anomaly of a multipolar projection neuron in the hippocampus pyramidal cell layer; pyramidal cells have a pyramid-shaped soma with the apex and an apical dendrite pointed toward the pial surface and other dendrites and an axon emerging from the base; the axons may have local collaterals but also project outside their cortical region |
