Brodmann area 28
Guenon
Brodmann area 28 is a subdivision of the cerebral cortex of the guenon defined on the basis of cytoarchitecture. Brodmann regarded its location adjacent to the hippocampus as imprecisely represented in the illustration of the cortex of the guenon brain in Brodmann-1909. It is located on the medial aspect of the temporal lobe.
Human
In the human it and the dorsal entorhinal area 34 (H) together constitute approximately the entorhinal area (Brodmann-1909).
Distinctive features (Brodmann-1905)
The molecular layer (I) is unusually wide; the external granular layer (II) contains nests of, for the most part, multipolar cells: the external pyramidal layer (III) contains medium sized pyramidal cells which merge with cells of the internal pyramidal layer (V); a clear cell free zone represents sublayer 5b of layer V; the multiform layer is wide and has a less clear two sublayer structure; the internal granular layer (IV) is totally absent.
See also
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Brain: telencephalon (cerebrum, cerebral cortex, cerebral hemispheres) |
| Primary sulci/fissures |
Medial longitudinal, Lateral, Central, Parietoöccipital, Calcarine, Cingulate, Callosal Collateral fissure |
| Frontal lobe |
Precentral gyrus (Primary motor cortex, 4), Precentral sulcus, Superior frontal gyrus/Frontal eye fields (6, 8, 9), Middle frontal gyrus (46), Inferior frontal gyrus (44-Pars opercularis, 45-Pars triangularis), Orbitofrontal cortex (10, 11, 12, 47) |
| Parietal lobe |
Somatosensory cortex (Primary (1, 2, 3, 43), Secondary (5)), Precuneus (7m), Parietal lobules (Arcuate fasciculus/Superior (7l), Inferior (40)), Angular gyrus (39), Intraparietal sulcus, Marginal sulcus |
| Occipital lobe |
Primary visual cortex (17), Cuneus, Lingual gyrus, 18, 19 - Lateral occipital sulcus |
| Temporal lobe |
Primary auditory cortex (41, 42), Superior temporal gyrus (38, 22), Middle temporal gyrus (21), Inferior temporal gyrus (20), Fusiform gyrus (37) Medial temporal lobe (Amygdala, Hippocampus, Parahippocampal gyrus (27, 28, 34, 35, 36) |
| Cingulate cortex/gyrus |
Subgenual area (25), anterior cingulate (24, 32, 33), Posterior cingulate (23, 31), Retrosplenial cortex (26, 29, 30), Supracallosal gyrus |
| white matter tracts |
Corpus callosum (Splenium, Genu, Rostrum, Tapetum), Septum pellucidum, Internal capsule, Corona radiata, External capsule, Olfactory tract, Fornix (Commissure of fornix), Anterior commissure, Posterior commissure Terminal stria Superior and Inferior longitudinal fasciculus, uncinate fasciculus, cingulum, Inferior occipitofrontal fasciculus |
| Basal ganglia |
Striatum (Putamen,Caudate nucleus, Nucleus accumbens), Globus pallidus, Claustrum, Subthalamic nucleus, Substantia nigra |
| Other |
Insular cortex Olfactory bulb, Anterior olfactory nucleus Septal nuclei Basal optic nucleus of Meynert |
| Some categorizations are approximations, and some Brodmann areas span gyri. |
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