Final answer:
Repetition of normal movement patterns are crucial for developing motor skills but can lead to maladjustment and negative health implications if they're unnaturally repetitive. Fixed action patterns and praxis are examples of how repetitive practices can enhance or impair motor skills depending on the nature of the activities.
Step-by-step explanation:
Repetition of normal movement patterns can lead to the development of motor skills, which are the ability of our bodies to execute movements and manipulate objects efficiently. However, when this repetition is unnaturally repetitive, as with computer operators or professional violinists, it can lead to maladjustment and health issues. This is because human patterns of physical exercise have evolved in natural environments, and deviations from this can impair health. For example, in neurology, practicing a fixed action pattern, which is a sequence initiated by a stimulus that continues to completion even after the stimulus is gone, can reinforce certain motor behaviors.
Praxis is another important aspect where patients can perform a task based solely on verbal instructions, requiring the understanding and conversion of these instructions into motor actions. This helps to coordinate cerebral motor commands with proprioceptive feedback and adjusts movements as needed. Moreover, patterns of repeated exercises can be critical for skills acquisition in activities such as sports or playing musical instruments. But without variety in physical activities to mirror the complex and varied movements humans are designed for, excessive repetitive motions can be counterproductive, leading to overuse injuries or loss of balance in muscle groups.