What is the motor belt?
The engine strip, also called the primary motor cortex or a precentral gyrus, is part of the front lobe of the brain that controls muscle movement, including voluntary movement, swallowing and speech. On the engine strip is also placed a pyramidal tract, which contains nerve cells that send messages to the skull and spinal nerves. One end of the motor strip, shaped as a belt, is located in the brain part that lies below the center of the upper head and runs towards the ear. The motor strip lies on the edge of the front lobe adjacent to the central sulcus and the parietal lobe.
The planned movements come from electrical pulses generated in the frontal lobe. These pulses activate the appropriate motor strip areas that send messages for movement. Once the movement occurs, the feedback is sent to the frontal lobe so that it can compare the planned movement with the movement that actually occurred and to make adjustments as needed. This feedback creates awareness in the mind of an individual that to the D movementOla.
The example of how this feedback process works is when lifting the trunk. If the individual assumes that the suitcase is full, it will prepare to lift sufficient strength to make the trunk fly up if it is empty. The front lobe quickly registers this feedback and makes adjustments to reduce muscle contraction in accordance with the actual lighter weight of the trunk.
Each area of the motor strip controls the specific areas of the body. The area closest to the top of the head controls the genitals, buttocks and legs. Moving towards the center of the motor strip, the area controls the trunk, arms and fingers. The face, mouth and swallowing of muscles are controlled by the motor strip closest to the ear.
These divisions can be imagined by the Homunculus engine, or a "small man" in Latin. Parts of the body in this representation do not match the size with the actual parts of the body. Hands, mouth and tongue are in the representation of homunculus mnOhem larger than the body and legs are much smaller. This is to show how much primary motor cortex is devoted to checking each part of the body. The body parts that require gentle muscle control take more space than areas that don't.
Damage to the motor strip from the disease or injury can cause mobility problems. Seizures in this area can cause involuntary movements of the affected part of the body, depending on the brain segment. In rare cases, individuals may suffer from an extraterrestrial hand syndrome in which the motor belt acts independently of the front bark. Parts of the body that do not control over the frontal bark can cause seemingly random, involuntary movements such as the neck grip or filling food in the mouth. Also, as a front cortex feedbacsystem K can not function either, the individual may not be aware that part of the body moves until he seeing part of the body in action and subsequently unable to control part of the body.