What Is the Inferior Temporal Gyrus?

There is an H zone (auditory speech center) in the posterior superior temporal gyrus of the cerebral cortex. Therefore, when the posterior superior temporal gyrus of the cerebral cortex is damaged, there is an auditory aphasia (that is, speaking, writing, understanding, but not understanding). What others say).

There is an H zone (auditory speech center) in the posterior superior temporal gyrus of the cerebral cortex. Therefore, when the posterior superior temporal gyrus of the cerebral cortex is damaged, there is an auditory aphasia (that is, speaking, writing, understanding, but not understanding). What others say).

Chinese name

Superior temporal gyrus

Foreign name

superior temporal gyrus, STG

Zone H

Auditory speech center

Symptom

(Understand what others are saying)

Meaning

Belongs to the temporal lobe

Supratemporal gyrus II. Anatomy:

1 Superior temporal gyrus 1, superior temporal gyrus:

The superior temporal gyrus is the part between the lateral groove of the brain on the temporal lobe and the superior temporal groove. Its dorsal side forms the inferior wall of the lateral groove of the brain, and its back has two to three small tropes obliquely forward and outward, called the transverse temporal gyrus, also known as Heschl's gyrus, which is the auditory cortical center. Transverse temporal gyros receive information from bilateral sources, but the contralateral ones are predominant. The fibers that conduct low-frequency impulses are cast to the front exterior of this zone, and the high-frequency is to the rear interior.

2 Superior temporal gyrus 2, temporal lobe:

The temporal lobe is located below the lateral sulcus of the brain and has a tongue shape. The posterior boundary is the line between the parietal occipital sulcus and the anterior occipital notch. The temporal lobe is divided into dorsal lateral and bottom surfaces.

Dorsal lateral surface: There are two grooves parallel to the lateral groove of the brain, one is the superior temporal groove, the front end of which is near the temporal pole, and runs backward parallel to the lateral groove of the brain. It is the middle temporal groove, below the superior temporal groove, and approximately parallel. The temporal lobe is divided into three parts: supratemporal, middle and inferior gyrus by superior temporal and middle sulcus. The dorsal surface of the superior temporal gyrus forms the inferior wall of the lateral lateral groove of the brain. The posterior part has 2 to 3 horizontal small gyrations obliquely forward and hidden in the lateral lateral groove of the brain. .

Bottom surface: the inside is a lateral accessory. There is an infratemporal sulcus parallel to it on the outside of the lateral collateral, also called the occipital-temporal sulcus. The part between the lateral collateral fissure and the occipitotemporal groove is called the spindle gyrus, also known as the medial occipitotemporal gyrus. The part outside the inferior temporal sulcus belongs to the inferior temporal gyrus, also known as the lateral occipitotemporal gyrus.

Both sides of the cerebral hemisphere. Located below the lateral fissure. The lateral surface is divided into superior temporal, medial, and inferior temporal gyrus by superior temporal sulcus and medial temporal sulcus. Part of the temporal temporal gyrus is at the bottom of the temporal lobe, where the auditory cortex is distributed.

3 Superior temporal gyrus 3, cerebral cortex:

The cerebral cortex is a layer of gray matter, which forms the surface of the grooves and gyrus of the cerebral hemisphere. It is the most important part of the brain and the material basis for advanced neural activity. The volume of the human cerebral cortex is about 300 cubic centimeters and the total area is about 2200 square centimeters. Among them, 1/3 is exposed on the surface, and 2/3 is located on the trench wall and trench bottom. The average thickness of the cortex is 2.5 mm, the central anterior gyrus is the thickest, about 4.5 mm, and the cortex at the occipital pole is the thinnest, about 1.5 mm. There are two main components in the cerebral cortex, one is a cell, which includes the cell body and neuroglia of a neuron; the other is a nerve fiber.

The gray matter covering the two hemispheres of the brain is the material basis for advanced neural activity and consists of neurons, nerve fibers, and glial matter. There are a large number of wrinkles on the human cerebral cortex, called the gyrus, the shallow gap between the gyrus is called the groove, and the deep and wide groove is called the fissure. The area of the sulcus gyrus increases the area of the cortex. The surface of the cerebral cortex is divided into five lobes-frontal, parietal, temporal, occipital, and limbic. The frontal lobe, parietal lobe, temporal lobe, and occipital lobe appear later in the phylogeny, called the neocortex, and the marginal lobe occurs earlier, called the old cortex. The cerebral cortex is divided into six layers from the outside to the inside: the molecular layer, the outer granular layer, the pyramidal cell layer, the inner granular layer, the ganglion layer, and the multi-type cell layer. They are composed of different types of nerve cells, and the granular cells receive the sense Signals, pyramidal cells transmit movement information.