The concept of brain dominance has witnessed extensive studies on the way the human brain deals with it, which is the largest part of the brain, the center of higher mental processes, as the brain consists of two identical halves connected by a large mass of nerve fibers called the corpus callosum. The right half controls the left side, while the left half controls the right side of the body. After the controlling hemisphere, the hemisphere directs behavior and is the basic nucleus on which it is built. The concept of brain dominance means that sensory information enters a large space into one of the two halves of the brain, and this hemisphere is the one that integrates with it and operates it, so that behavior is directed in light of that. Accordingly, the problem of the study came through studying the brain dominance of the brain and determining which of the two halves is based on the mechanisms of analyzing and constructing the stimuli coming to the brain, one of the important foundations for achieving compatibility in the requirements and important features in selecting players, whether on the physical, functional or mental level, due to what the effectiveness of hurdle running requires in terms of elements of creativity, motor coordination, physical abilities and innovation in the technical requirements of performance. Here we can ask the following question;

Does brain dominance have an impact and reality in determining the level of skill performance of students in the 110-meter hurdles effectively?

In light of the above, the research objectives were formulated as follows:

• Classification of the researched sample according to brain dominance.
• Statistical description of the sample according to their classification by brain dominance.

For the research methodology, the researcher utilized the descriptive method along with the standard grading system. The sample of research was chosen at random from the community of research, this represented the second stage of students for the academic year 2023-2024, the numbering (173) was then assigned in a random manner. About the statistical methods employed, the researcher discussed a cohort of them in order to facilitate his endeavor and achieve his objectives. From the aforementioned, the researcher deduced conclusions that were of greatest importance, these were:

• The sample came in varying proportions of brain dominance patterns and were distributed among the three patterns (right, left, integrated).

The sample achieved varying proportions in the level of skill performance in the effectiveness of running hurdles 110 meters according to the brain dominance patterns that the sample members enjoy.