Fig. 12.

Comparison of the use of postural adjustments in concert with pellet retrieval. Rating scale ranges from 1 to 3: 1 indicates abnormal behavior and 3 indicates mature, normal movements. Each symbol represents an individual animal in the specified group.CON rats consistently demonstrate postural adjustments while reaching and eating. HX rats do not reach and therefore fail to make subsequent postural adjustments. They also lack appropriate postural adjustments to maintain balance while retrieving pellets with their tongue. Impaired motor control in each HX animal frequently results in a loss of balance when they move away from their center of gravity. HX+TP rats usually adjust their posture to maintain balance when reaching forward for a food pellet. This represents marked improvements as compared with HX animals in the ability to coordinate postural responses with forelimb use.