What is the function of the precentral gyrus in the brain?

An important functional area of the frontal lobe is the precentral gyrus, which is located rostral to the central sulcus. The precentral gyrus is called the somato-motor cortex because it controls volitional movements of the contralateral side of the body.

What happens if the right precentral gyrus is damaged?

Lesions of the precentral gyrus result in paralysis of the contralateral side of the body (facial palsy, arm-/leg monoparesis, hemiparesis) – see upper motor neuron.

What part of the body does the precentral gyrus control?

primary motor cortex
The precentral gyrus (PCG), also known as the motor strip or primary motor cortex, is the part of the brain’s neocortex responsible for executing voluntary movements.

What does the gyrus control?

Key Takeaways: Brain Gyri and Sulci Gyri (singular: gyrus) are the folds or bumps in the brain and sulci (singular: sulcus) are the indentations or grooves. Folding of the cerebral cortex creates gyri and sulci which separate brain regions and increase the brain’s surface area and cognitive ability.

Where are the motor areas of the precentral gyrus?

Anterior to the precentral gyrus, separated by the precentral sulcus, lie a set of areas composing the lateral premotor cortex and the supplemental motor area. Posteriorly, separated by the central sulcus, lies the primary somatosensory cortex.

Is the precentral gyrus in the posterior frontal lobe?

The precentral gyrus (also known as the motor strip) is a prominent structure on the surface of the posterior frontal lobe. It is the site of the primary motor cortex (Brodmann area 4).

Where is the face located in the postcentral gyrus?

Within the postcentral gyrus, the face is represented in the lateral third, the upper extremity (with emphasis on the fingers) in the middle third, and the trunk, hip, and thigh in about the medial third; the leg, foot, and genitalia are represented in the posterior paracentral lobule.

How is region-specific atrophy of precentral gyrus assessed?

Purpose: To assess the region-specific atrophy of precentral gyrus (PrCG) and its correlation to clinical function score in amyotrophic lateral sclerosis (ALS). Materials and methods: Twenty-eight patients with sporadic ALS and 28 healthy controls underwent high-resolution 3D T1-BRAVO magnetic resonance imaging at 3T.