Task: Class Definition Understanding (ontology: Sciences/Biology)

Which of the following definitions best describes 'septohippocampal nucleus'?

A. Part of septal nuclear complex. In the human, it refers to the most caudal of scattered clusters of neurons in the septum pellucidum that extend, on the underside of the corpus callosum, from the level of the medial septal nucleus to the CA fields ( Crosby-1962 ). In the rat it is associated with the lateral septal nucleus throughout its rostro-caudal course toward the CA fields ( Swanson-1998. Adapted from Brain Info.
B. A part of the striatum which is primarilly composed of amygdalar areas. The the concept is composed of the anterior amygdalar area, central amygdalar nucleus, intercalated amygdalar nucleus, medial amygdalar nucleus, and the bed nucleus of the accessory olfactory tract.
C. Laminated structure lying caudal to the olfactory bulb.
D. A component of the nuclei of stria terminalis defined on the basis of topology, connectivity and multiple stains in the rat. It is one of seven components of the posterior nuclei of stria terminalis in the Functional CNS Model - Rat ( Swanson-2004 ).

Answer: Part of septal nuclear complex. In the human, it refers to the most caudal of scattered clusters of neurons in the septum pellucidum that extend, on the underside of the corpus callosum, from the level of the medial septal nucleus to the CA fields ( Crosby-1962 ). In the rat it is associated with the lateral septal nucleus throughout its rostro-caudal course toward the CA fields ( Swanson-1998. Adapted from Brain Info.