Corpus callosum

Corpus callosum (the corpus callosum, commissura pallii, commissure cerebri magna) - a powerful spike of the big hemispheres of the brain, resulting in connection with the development neopallium.
In corpus callosum (Fig) there are long, middle, or body (truncus corporis callosi), rear thickness in part, roller (splenium corporis callosi), and the front arc curved part, knee (genu corporis callosi), which is thin, pointed and forms the bill (rostrum corporis callosi)and further down is fine Rostral plate (lamina rostralis, BNA). The upper surface of the corpus callosum, which is the bottom longitudinal cracks brain (fissura longitudinalis cerebri), covered with a thin layer of gray matter (indusiuni griseum)that forms on both sides of the middle line two thick longitudinal strips [striae longitudinales med. (Lancisii)], a no-right and left - lateral longitudinal strips (striae longitudinales lat.). Under M.L., pressed back to its bottom surface, pass the arch (fornix, see the Ventricles of the brain). Between MT and column of the code, a triangle is formed, facing the top down and busy transparent wall (septum pellucidum).
The fibers of the corpus callosum diverge fan-shaped form luchistoi MT (radiatio corporis callosi). In the anterior MT these fibers go forward, heading for the front departments of the frontal lobes. On average, the Department they diverge in hand, connecting the rear sections of the frontal lobes and the parietal lobe. In the posterior part these fibers connect the temporal and occipital lobe. Divergent backwards fiber rear forceps form in the back horn lateral ventricle of the bulge, the so-called onion back horn (bulbus cornus posterioris).
The fibers of the corpus callosum go in different directions, but mainly in the cross. In addition to the fiber that connects a symmetric space hemispheres, in MT are such fibers that connect the opposite gyrus opposite hemispheres, such as the frontal gyrus one hemisphere with the parietal or occipital another. Fiber MT give well as collaterals for various departments hemisphere their part. This is not comisarului fiber, and Associazione.

The topography of the corpus callosum: 1 - rostrum corporis callosi; 2 - genu corporis callosi; 3 - septum pellucidum; 4 - fornix; 5 - truncus corporis callosi; 6 - splenium corporis callosi.

Corpus callosum and in ontogenesis and phylogenesis person develops later than the other commissural ways, and its development is dependent on the formation of a new bark, soldering of which it is.
The question of the role MT in the steam activity of the big hemispheres remains to the present time has not been solved, as there are significant discrepancies between the data on the one hand morphologists (of progressive development of MT in evolution) and on the other hand clinicians (about the absence of specific symptoms defeats MT) and psychologists (about the absence of any significant violations after experiments with dissection MT).
Isolated diseases of the corpus callosum in the clinic are rare. More often than other processes are tumors that can capture the front, middle or back parts MT In process of growth of the tumor and its dissemination to the relevant departments hemisphere reveals specific syndromes destruction of the frontal lobe, the front and back Central gyrus or lesion in the parietal lobe of the brain.