why Most individuals with left cerebral dominance are right-handed
The brain is divided into two hemispheres, the left and the right. Each hemisphere has different functions, with the left hemisphere being responsible for language and logical thinking, while the right hemisphere is more involved in spatial awareness and creativity.
The brain's control over the body is crossed, meaning that the left hemisphere controls the right side of the body, and vice versa. This phenomenon is known as contralateral control. Therefore, if an individual has left cerebral dominance, meaning their left hemisphere is more dominant, it would result in greater control and coordination of the right side of the body.
Handedness is determined by a combination of genetic and environmental factors. While the exact cause of handedness is not fully understood, studies suggest that it is influenced by a combination of genes, prenatal hormones, and brain development.
Given that the left hemisphere is involved in language and logical processing, it is thought to play a crucial role in the development of right-handedness. Studies have shown that the left hemisphere tends to be larger and more active in individuals who are right-handed, while left-handed individuals may have a more balanced or even a right hemisphere dominance.
However, it is important to note that not all individuals with left cerebral dominance are right-handed, and not all right-handed individuals have left cerebral dominance. Handedness and cerebral dominance can vary from person to person, and there can be individuals who are left-handed with left cerebral dominance or right-handed with right cerebral dominance, although they are rarer.
Most individuals have a dominant hemisphere in their brain, which means that one side of the brain is more specialized for certain functions compared to the other side. In about 90% of right-handed individuals, the left hemisphere is dominant for language and other cognitive functions. This dominance is believed to contribute to the development of right-handedness in most individuals.
The reason behind this association between left cerebral dominance and right-handedness is not fully understood. However, some research suggests that it is related to the wiring of the brain. The motor cortex, which controls voluntary movements, is typically located in the opposite hemisphere from the dominant language areas. In right-handed individuals, the left hemisphere is dominant for language, while the right hemisphere controls the left side of the body. Therefore, because the left hemisphere is dominant for language and controls the right side of the body, it is more likely to be associated with right-handedness.
It is important to note that not all left-handed individuals have right cerebral dominance, and not all right-handed individuals have left cerebral dominance. There is some variability in the population, and these associations are not absolute.
Most individuals with left cerebral dominance are right-handed due to a phenomenon called cerebral lateralization. Cerebral lateralization refers to the division of labor between the two hemispheres of the brain. In the majority of individuals, the left hemisphere is responsible for language and logical processing, while the right hemisphere is involved in visual-spatial processing and creativity.
During brain development, around the 10th to 12th week of gestation, a process called brain lateralization occurs. At this stage, the left hemisphere typically becomes more dominant for language and fine motor control, while the right hemisphere becomes dominant for visual-spatial processing.
Since the motor control of the right hand is controlled by the left hemisphere, most people with left cerebral dominance end up being right-handed. This is because the left hemisphere has a stronger influence on controlling the dominant hand, leading to a preference for right-handedness.
It is important to note that not all individuals with left cerebral dominance are right-handed, and there are some exceptions to this general trend. Some individuals with left cerebral dominance may be left-handed or have mixed-handedness, where they use different hands for different tasks. The reasons for this variation are not fully understood and may involve a combination of genetic factors and environmental influences.