* * * The main symptoms of ataxia are as follows: 1, posture and gait changes: trunk ataxia is caused by vermis lesions, with unstable standing, faltering gait, feet off the ground, swaying when walking, and even difficult to sit still in severe cases, with upper vermis damaged and toppled forward, lower vermis damaged and toppled backward, and upper limbs * * * ataxia is not obvious. When walking, the cerebellar hemisphere lesions tilt or fall to the affected side.

2. voluntary movement's coordination disorder: Injury of cerebellum hemisphere leads to ataxia of ipsilateral limbs. The performance is poor discrimination and intentional tremor, the upper limbs are heavier, and the closer the movement is to the target, the more obvious the tremor is.

3. Speech disorder: speaking slowly, vaguely, intermittently, stuttering or explosively, expressing poetic or explosive language is due to the imbalance of pronunciation muscles such as lips, tongue and throat.

4, eye movement disorder: eye movement muscle ataxia appears gross ataxia nystagmus, especially when vestibular contact is involved, the eyeball swings back and forth, occasionally jumping nystagmus, rebound nystagmus and so on.

5, decreased muscle tone: pendulum-like tendon reflex can be seen, which is seen in acute cerebellar lesions. When the patient's forearm resists resistance contraction, if the external force is suddenly removed, the contraction cannot be stopped immediately, and it may hit his chest (rebound phenomenon).

6. With the progress of the disease, patients with ataxia can show unstable sitting position and even stay in bed. Lack of order or order, irregularity, confusion and disharmony in action. It is caused by the loss of antagonistic muscle contraction regulation of actuator muscles. Include static ataxia and dynamic ataxia.

7. Clinically, we often use nose, fingers, rotation, heel, knee and tibia to test or observe fine movements such as combing hair and writing when we open our eyes and close our eyes.