The Golgi morphology of the neurons in the human interthalamic adhesion (IA, which is not present in every human brain) is very variable. Four types of Golgi-impregnated neurons were found in the adult human IA: (1) fusiform neurons (most characteristic of the human IA); (2) neurons with an oval perikaryon; (3) triangular neurons (rarely found) and (4) multipolar neurons (polygonal perikaryon and at least 4 primary dendrites). Fusiform neurons as well as triangular and multipolar ones, belong to the isodendritic type, but the neurons with oval perikarya do not.
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