Comhlacht callous

Clár ábhair

Comhlacht callous

The corpus callosum is a structure located within the brain and connecting the two left and right hemispheres.

Position and structure of the corpus callosum

Post. The corpus callosum is the main junction between the left and right hemispheres of the brain (1). It is located at the center and towards the bottom of the two hemispheres. The upper surface of the corpus callosum is thus in contact with the hemispheres.

struchtúr. Arch-shaped, the corpus callosum is a bundle made up of an average of 200 million nerve fibers. These fibers grow through the white matter of different lobes or areas of the hemispheres.

The corpus callosum is made up of four distinct areas, which are, from front to back (1):

  • The rostrum, or beak, connecting the left and right frontal lobes;
  • The knee, connecting the left and right parietal lobes;
  • The trunk, connecting the left and right temporal lobes;
  • And selenium, connecting the left and right occipital lobes.

Vascularization. The corpus callosum is supplied by the two anterior cerebral arteries, with the exception of the splenium. The latter is partly vascularized by the branches of the posterior cerebral artery (1).

Fiseolaíocht / Histeolaíocht

Communication between the two hemispheres. The corpus callosum plays a central role in the transfer of information between the left and right hemispheres of the brain. This communication thus allows the coordination of the two hemispheres, the interpretation of information and the action accordingly (1).

Ore Níos mó ar an ábhar:  Phalanges: cad é?

Pathologies of the corpus callosum

An integral part of the central nervous system, the corpus callosum can be the site of numerous pathologies, the causes of which may be of inflammatory, infectious, tumor, vascular, traumatic origin or may be linked to abnormalities.

Agenesis of the corpus callosum. The corpus callosum can be the site of malformations, one of the most frequent of which is agenesis.

Head trauma. It corresponds to a shock to the skull which can cause brain damage. (2) These lesions can be concussions, i.e. reversible lesions, or contusions, irreversible lesions (3).

Stroke. Cerebrovascular accident, or stroke, is manifested by obstruction, such as the formation of blood clots or the rupture of a blood vessel in the brain. (4) This pathology can impact on the functions of the corpus callosum.

Brain tumors. Benign or malignant tumors can develop in the corpus callosum. (5)

Scléaróis iolrach. Is galar autoimmune é an paiteolaíocht seo sa lárchóras néaróg. Ionsaíonn an córas imdhíonachta an myelin, an sceach timpeall ar shnáithíní nerve, ag cruthú frithghníomhartha athlastacha. (6)

Corpus callosum treatments

Cóireálacha drugaí. Ag brath ar an bpaiteolaíocht a ndearnadh diagnóis uirthi, féadfar cóireálacha áirithe a fhorordú mar dhrugaí frith-athlastacha.

 

Thrombolyse. Úsáidtear le linn strócanna, is éard atá sa chóireáil seo ná an thrombi, nó na téachtáin fola, a bhriseadh suas le cabhair ó dhrugaí. (4)

Cóireáil máinliachta. Ag brath ar an gcineál paiteolaíochta a ndearnadh diagnóis air, féadfar máinliacht a dhéanamh.

Ceimiteiripe, radaiteiripe. Ag brath ar chéim an meall, is féidir na cóireálacha seo a chur i bhfeidhm.

 

Examination of the corpus callosum

Scrúdú fisiceach. Ar dtús, déantar scrúdú cliniciúil d’fhonn na hairíonna a bhraitheann an t-othar a bhreathnú agus a mheas.

Ore Níos mó ar an ábhar:  Dimple: ar na leicne, aghaidh nó smig, cad é?

Medical imaging examination. In order to assess brainstem damage, a cerebral and spinal CT scan or a cerebral MRI can in particular be performed.

Bithóipse. Is éard atá sa scrúdú seo sampla de chealla.

 

Puncture lumbar. Ligeann an scrúdú seo anailís a dhéanamh ar an sreabhán cerebrospinal.

Stair

The function of the corpus callosum was unveiled in the 50s thanks to the work of Ronald Myers and Roger Sperry at the California Institute of Technology (7). Their studies on the corpus callosum section in cats revealed no effect on behavior while learning faculty and perception appeared to be altered (1).

Leave a Reply