Final answer:
Pathological gait refers to changes in walking patterns characterized by altered biomechanics, balance and posture issues, and the presence of conditions like ataxia.
Step-by-step explanation:
Pathological gait can present as altered biomechanics. This involves changes in the way a person walks, including abnormal placement of the feet, movement of the arms, balance and posture problems, and the inability to perform walking variations smoothly, such as tandem gait or walking on heels or toes. Conditions such as ataxia can disrupt normal walking patterns, leading to difficulty with planning and executing tasks, and causing a noticeable change in gait.