Shares of the cerebral hemispheres
Frontal lobe (lobus frontalis) contains a number of grooves that demarcate gyrus. Precentral sulcus is located in the frontal plane parallel to the central sulcus, and with it separates the precentral gyrus, which closes the conditioned motor reflexes - the core of the motor analyzer. V layer of the cortex precentral gyrus, a giant paramidnymi cells, is the point of beginning of the pyramidal path that connects the right motor cortex area of the left half of the body and vice versa. The upper, middle and inferior frontal gyrus delimited by two grooves, direction perpendicular to the precentral sulcus. In the posterior inferior frontal gyrus is the motor center of speech - motor analyzer articulated speech. The motor center of speech, like the auditory analyzer of speech and other speech centers in the embryonic stage of development is formed on both sides, but develops only one - on the left in right-handers and right-handers have. Posterior parts of middle frontal gyrus contain the combined center of rotation of the head and eyes to one side and the center of writing - writing motor analyzer.
Parietal lobe (lobus parietalis) contains the postcentral gyrus, which is separated postcentral and central sulci and contains the center of touch, pain and temperature sensitivity. Vnutritemennaya furrow is directed perpendicular to the postcentral sulcus and separates the upper and lower parietal lobes. In the superior parietal lobe is the center of stereognosis, that is, recognition of objects by touch. The inferior parietal lobule contains supramarginal gyrus, which rests against the lateral sulcus or gyrus landmark. Here is the center of praxia - directed synthesis of labor skills, sports and supramarginal gyrus, etc. Under the angular gyrus is, is the center of reading, that is, the visual analyzer of written speech. Praxia center and the center are reading in right-handers from the left side.
In the temporal lobe (lobus temporalis) lies five parallel gyri, which are also parallel to the lateral sulcus. Three of them are on the surface of the hemispheres verhnelateralnoy and separated the upper and lower temporal sulci. The other two are located on the lower and medial surfaces. In right-handers from the left side and left-handed to right in the back of the superior temporal gyrus contains sensory speech center - speech auditory analyzer. The core of the auditory analyzer lies in the middle portion of the superior temporal gyrus. It is located on the surface facing the island. In the medial temporal lobe is parahippocampal gyrus, close to where in the thick of the temporal lobe overlies the hippocampus. Gyrus itself contains the center of smell and taste. Parahippocampal gyrus Anterior bends and is called the hook.
|In Fig. 258.
Lobe of the brain side view
1 - the parietal lobe;
2 - the furrows of the brain;
3 - the frontal lobe;
4 - the occipital lobe;
5 - temporal lobe;
6 - spinal cord
Occipital lobe (lobus occipitalis) contains a deep calcarine sulcus, passing on its medial surface. Calcarine sulcus is located above the wedge and below - lingual gyrus. And lingual gyrus wedge contain a center of the visual analyzer.
The limbic system of the cerebral hemispheres is a collection of individual structures, arranged in a ring responsible for emotional reactions and regulate the functioning of internal and endocrine organs. For the structures of the brain, which is part of the limbic system, parahippocampal gyrus are, hippocampus, vault, cingulate gyrus, located above the corpus callosum and other structures.
a., aa. — arteria, arteriae (artery, the artery)
lig., ligg. — ligamentum, ligamenta (ligament, the ligaments)
m., mm. — musculus, musculi (muscle, the muscle)
n., nn. — nervus, nervi (nerve, the nerve)
r., rr. — ramus, rami (branch)
s. — seu (or)
v., vv. — vena, venae (vienna)