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Brodmann area 13 is a subdivision of the cerebral cortex of the guenon defined on the basis of cytoarchitecture.
[edit] Location
Located in the posterior part of the insula, it shares with other parts of the insular cortex a wide molecular layer (I) and very wide multiform layer (VI).
[edit] Layers
The external granular layer (II) is relatively dense. The external pyramidal layer (III) has a central stripe of less cellular density that separates two sublayers, IIIa and IIIb. The internal granular layer (IV) is sufficiently wide and dense to separate clearly sublayer IIIb from layer V. The boundary between layers V and VI is defined by larger ganglion cells, more pyramidal in shape, in layer V giving way to smaller, more spindle-shaped cells that become denser and more homogeneous deeper in layer VI. Often the spindle cells are arrayed horizontally as in the claustrum (VICl), which Brodmann considered a likely extension of layer VI beyond the extreme capsule (VICe) (Brodmann-1905).
[edit] External links
- For the internal structure of this area visit BrainInfo
[edit] See also
Brain: telencephalon (cerebrum, cerebral cortex, cerebral hemispheres) |
primary sulci/fissures |
medial longitudinal, lateral, central, parietoöccipital, calcarine, cingulate |
frontal lobe |
precentral gyrus (primary motor cortex, 4), precentral sulcus, superior frontal gyrus (6, 8), middle frontal gyrus (46), inferior frontal gyrus (Broca's area, 44-pars opercularis, 45-pars triangularis), prefrontal cortex (orbitofrontal cortex, 9, 10, 11, 12, 47) |
parietal lobe |
postcentral sulcus, postcentral gyrus (1, 2, 3, 43), superior parietal lobule (5), inferior parietal lobule (39-angular gyrus, 40), precuneus (7), intraparietal sulcus |
occipital lobe |
primary visual cortex (17), cuneus, lingual gyrus, 18, 19 (18 and 19 span whole lobe) |
temporal lobe |
transverse temporal gyrus (41-42-primary auditory cortex), superior temporal gyrus (38, 22-Wernicke's area), middle temporal gyrus (21), inferior temporal gyrus (20), fusiform gyrus (36, 37) |
limbic lobe/fornicate gyrus |
cingulate cortex/cingulate gyrus, anterior cingulate (24, 32, 33), posterior cingulate (23, 31),
isthmus (26, 29, 30), parahippocampal gyrus (piriform cortex, 25, 27, 35), entorhinal cortex (28, 34) |
subcortical/insular cortex |
rhinencephalon, olfactory bulb, olfactory tract, corpus callosum (splenium, genu, rostrum), lateral ventricles, septum pellucidum, ependyma, internal capsule, corona radiata, external capsule, fornix (commissure of fornix), anterior commissure, posterior commissure |
hippocampal formation |
dentate gyrus, hippocampus, subiculum |
basal ganglia |
striatum (caudate nucleus, putamen), lentiform nucleus (putamen, globus pallidus), claustrum, extreme capsule, amygdala, nucleus accumbens |
Some categorizations are approximations, and some Brodmann areas span gyri. |