Sluggishness and feelings of weakness. It goes without saying that control of all muscular movement is sited within the motor region of the cerebral cortex. The motor cortex in each side of the brain generally controls the opposite side of the body. For example, if you were to move your right hand, it would be controlled by the left side of the brain, and vice versa. A tumor sited in, or even near, the motor cortex, or anywhere along the neural pathways to the affected limb, will affect the function of that limb, eventually resulting in complete dysfunction. Even if a brain tumor does not cause discomfort in the limbs, one may find that the actual function of those limbs is severely impaired, or even totally absent.

Indistinct, hesitant or inarticulate speech. When a person has a tumor that affects the language centers on the left side of the brain, this can result in considerable disruption in the individual’s ability to articulate (or even think of) words. Such a difficulty is a definite symptom of such a tumor. Broca’s area is the region of the cerebral cortex that controls motor functions in speech, and Wernick’s area controls an individual’s ability to comprehend language. When either of these areas is affected by a tumor, the person concerned might have trouble either speaking, or in understanding others, or often, trouble with both.

Irregular moods and personality and behavioral changes. A tumor in the brain can result in a considerable alteration of the personality, with the individual exhibiting character traits that they perhaps did not possess before. A person might become subject to anxiety, or be easily depressed. This is because the centers that control personality lie in the frontal lobe, and pressure on these areas can actually alter the personality. Other behaviors can include anger, sexual promiscuity, or agitation. A previously inhibited person may become very uninhibited, and a previously cautious person may loose their caution.