NURSING ANM AND GNM

Detailed explanation-1: -Dysmetria is an inability to judge the distance or range of a movement. It may be manifested by an overestimation (hypermetria) or an underestimation (hypometria) of the required range needed to reach an object or goal.

Detailed explanation-2: -In particular, hypermetria is increased following addition of inertial loads to the moving hand, as a consequence of the inability to tune adequately the intensity of the antagonist activity.

Detailed explanation-3: -In the absence of the cerebellum, the subconscious motor control system cannot predict how far movements will go. Therefore, the movements ordinarily overshoot their intended mark; then, the conscious portion of the brain overcompensates in the opposite direction for the succeeding compensatory movement.

Detailed explanation-4: -Dysmetria is a classical sign which designates the overshoot, also called hypermetria, and the undershoot, or hypometria, when the patient attempts to reach rapidly an aimed target. Dysmetria is typically observed in patients presenting a cerebellar dysfunction.