What Is the Inferior Parietal Lobe?

It is a leaf of the brain. The parietal lobe is on the outer side of the dorsal side. The front is bounded by the central sulcus, the lower part is bounded by the lateral cleft of the brain, and the rear is a dashed line from the upper end of the parietal occipital fissure to the anterior occipital notch. Its inner side is above the buckle groove. The dorsal outer side of the parietal lobes has a central posterior ditch parallel to the central ditch. The posterior part of this ditch has an interparietal ditch running in the front-back direction. These two ditches divide the parietal lobes into three parts: between the central ditch and the central posterior ditch. There is a central back, the part above the parietal sulcus is called the parietal lobe, and the part below the parietal sulcus is called the parietal lobe. The parietal and inferior lobes are further divided into circular and angular gyrus. The parietal lobe has a sensory center and many other important areas. The parietal lobe is damaged, and there may be symptoms such as abnormal cerebral cortex sensation or sensory disturbance, inability to use (apraxia), dyslexia, blindness of the contralateral isotropic lower quadrant, spatial positioning disorder, and body atrophy.

Chinese name: Parietal lobe
Foreign name: Parietal lobe
Location: Between frontal, occipital and temporal

Form: complex structure
Function: Reflects the correctness of the partition mixing theory
The main function: Physical sense, taste, touch, etc.

Parietal anatomy

Divided into the outer side of the back and the inner side. The anterior border of the dorsal lateral surface is the central sulcus, the lower border is the posterior branch of the lateral cleft of the brain, and the posterior border is the line connecting the upper end of the parietal occipital groove to the anterior occipital notch. The front boundary of the inner side is the marginal branch of the cingulate ditch, the rear boundary is the top occipital ditch, and the lower boundary is the sub-top ditch. This groove is a continuation of the cingulate ditch.

Dorsal lateral surface: there is a central rear ditch parallel to the central ditch, and it is often divided into two sections. The part between it and the central ditch is the central posterior gyrus. The interparietal sulcus usually starts from the upper part of the central posterior sulcus, runs parallel to the medial edge of the dorsal back, and goes below the upper end of the parietal sulcus, turning downward to form a occipital transverse sulcus. The interparietal groove divides the posterior part of the parietal lobe into two parts: the upper part is called the upper leaflet, and the lower part is called the lower part. The anterior part of the parietal lobe surrounds the part of the posterior branch of the lateral fissure, called the marginal superior gyrus; the posterior part of the superior temporal lobe is called the angular gyrus.

Inner side: divided by the marginal branch of the cingulate groove into two parts. The anterior part is smaller and is the continuation of the central posterior gyrus and forms the posterior part of the lateral central leaflet. The posterior part is called wedge anterior lobe. The anterior boundary of this leaf is the marginal branch of the cingulate groove and the posterior boundary is the parietal occipital sulcus. , The lower bound is the top ditch.

Damaged parietal lobe

Damage to the parietal lobe results in mental body image disorders, that is, self-confidence in space. It has the following clinical manifestations:

Parietal limb confession

The left parietal infarction of the right parietal lobe has left hemiplegia, but the patient denied paralysis of the affected limb, and believed that the limb with left paralysis was not owned by him and was a negative body image disorder.

Parietal phantom

Phantom polylime refers to the presence of a third phantom limb in the left hemiplegia, which is a positive body image disorder.

Parietal pain

Painlessness refers to the fact that pain stimuli are not recognized. Actual pain sensations exist. For example, there is no painful reaction when burning a cigarette, and there is no protective reflex of discarding cigarette butts. Lesions in the upper left gyrus, involving part of the angular gyrus and superior temporal gyrus, are rare.

Parietal face failure

Facial misunderstanding means not knowing an acquaintance or even your own face in the mirror. It is often accompanied by color, object, and azimuth, and is a rare symptom of damage to the top occipital region.