Brodmann Area 23 - Subdivisions

Subdivisions

The area has been subdivided further: In the macaque (Macaca fascicularis) the following subdivisions have been suggested:

• 23i (internal)
• 23e (external)
• 23v (ventral), the most caudalventral (inferior) portion and with most highly developed layer IV.

Another suggestion is for macaque (Macaca mulatta)

• 23a, adjacent to the callosal sulcus thus closest to Brodmann area 30.
• 23b
• 23c

Further division of 23b is.

• pv23b, posteroventral part for 23b, main thalamic projections from anterior nuclei.
• d23b, dorsal part of 23b, weak connections from the anterior nuclei.