splenium: Definition and Much More from Answers.com

Brain: Splenium
Median sagittal section of brain. The relations of the pia mater are indicated by the red color. (The corpus callosum is the gray curved figure in the center, and the splenium is labeled at upper right.)
Corpus callosum from above. (Splenium visible but not labeled.)
Latin	s. corporis callosi
Gray's	subject #189 828
NeuroNames	hier-178
Dorlands/Elsevier	s_19/12751030

The posterior end of the corpus callosum is the thickest part, and is termed the splenium.

It overlaps the tela chorioidea of the third ventricle and the mid-brain, and ends in a thick, convex, free border.

A sagittal section of the splenium shows that the posterior end of the corpus callosum is acutely bent forward, the upper and lower parts being applied to each other.

Additional images

Mesal aspect of a brain sectioned in the median sagittal plane.

The fornix and corpus callosum from below.

External links

• Atlas of anatomy at UMich n1a5p4
• Roche Lexicon - illustrated navigator, at Elsevier 13048.000-3
• Diagram at neuropat.dote.hu

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

Brain: telencephalon (cerebrum, cerebral cortex, cerebral hemispheres)
Primary sulci/fissures	Medial longitudinal, Lateral, Central, Parietoöccipital, Calcarine, Cingulate, Callosal
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) - Gyrus rectus
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, Marginal sulcus
Occipital lobe	Primary visual cortex (17), Cuneus, Lingual gyrus, 18, 19 (18 and 19 span whole lobe) - Lateral occipital sulcus
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 (Perirhinal cortex, 25, 27, 35), Entorhinal cortex (28, 34) - Archicortex (Supracallosal gyrus) - Uncus
Subcortical/insular cortex	Rhinencephalon, Olfactory bulb, Olfactory tract, Corpus callosum (Splenium, Genu, Rostrum, Tapetum), Lateral ventricles (Calcar avis), Septum pellucidum, Ependyma, Internal capsule, Corona radiata, External capsule, Fornix (Commissure of fornix), Anterior commissure, Posterior commissure
Hippocampal formation	Dentate gyrus - Hippocampus - Alveus - Fimbria - Subiculum
Basal ganglia	Striatum (Caudate nucleus, Putamen), Lentiform nucleus (Putamen, Globus pallidus), Claustrum, Extreme capsule, Amygdala, Nucleus accumbens
other	Terminal stria - Paracentral lobule - Collateral fissure - Semioval center - Septal nuclei - Basal optic nucleus of Meynert - Anterior olfactory nucleus
Some categorizations are approximations, and some Brodmann areas span gyri.