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The sulci and fissures are shallow and deep grooves respectively in the cortex, that organise the brain into its regions. [2] A sulcus is a shallow groove that surrounds a gyrus or part of a gyrus. A fissure is a deeper furrow that divides the brain into lobes, and also into the two hemispheres as the longitudinal fissure. [4]
Most famous parts of the brain highlighted in different colours The human brain anatomical regions are ordered following standard neuroanatomy hierarchies. Functional , connective , and developmental regions are listed in parentheses where appropriate.
While the surface area of the central sulcus is shown to affect the handedness of an individual, it is not understood what the shape of the central sulcus affects as it is not widely explored. There is a region of the central sulcus, called the “hand knob”, which is a notch in the area of the hand motor region.
Occipitoparietal fissure: found between the occipital and parietal lobes of the brain. Wernicke's fissure: separates the brain's temporal and parietal lobes from the occipital lobe. Zygal fissure: found in the cerebrum. In the brain, a sulcus is a groove formed in the stage of gyrification by the folding of the cortex.
Gyrification in the human brain. Gyrification is the process of forming the characteristic folds of the cerebral cortex. [1] The peak of such a fold is called a gyrus (pl. gyri), and its trough is called a sulcus (pl. sulci).
Along the upper margin is a shallow groove, which, together with that on the opposite parietal, forms a channel, the sagittal sulcus, for the superior sagittal sinus; the edges of the sulcus afford attachment to the falx cerebri.
It has a ridged appearance with a shallow groove at the midline. This groove is the basilar sulcus and is covered by the basilar artery. [2] The basilar artery feeds into the circle of Willis providing blood supply to the brainstem and cerebellum. [3] The ridged appearance is due to the fibers that come out of the pons to enter the cerebellum. [2]
Gray's FIG. 726 – Lateral surface of left cerebral hemisphere, viewed from the side Gray's Fig. 727 – Medial surface of left cerebral hemisphere. In neuroanatomy, a gyrus (pl.: gyri) is a ridge on the cerebral cortex.