What gait characteristic is observed when there is hyperextension at the knee due to a posterior channel deficit?

The characteristic of knee instability during gait is linked to hyperextension at the knee caused by a posterior channel deficit. When there is hyperextension, the knee does not maintain its normal alignment, which can result in a lack of stability during the gait cycle. This instability leads to difficulties in maintaining balance and control as the individual moves, causing compensatory adjustments in gait patterns to avoid falling or losing balance.

In individuals with this condition, the muscle and joint mechanics are disrupted, leading to an inability to properly stabilize the knee joint. This instability may be further exacerbated by insufficient muscular support during the stance phase of walking, resulting in a precarious gait.

In contrast, a normal motor control and proprioception would allow for greater stabilization of the knee joint, thus promoting a more controlled and stable gait. Gait characteristics like increased stride length, a flexed knee during stance, or a high stepping gait are not directly linked to the observed hyperextension and associated instability that arises from a posterior channel deficit.