ataxic gait
Meaning of ataxic gait: Walking that has lost its coordination, wide and lurching, as though the legs were no longer taking instruction accurately.
Definition of ataxic gait
Ataxic gait is an unsteady, uncoordinated way of walking caused by damage to the systems that control balance and the timing of movement. The stance is wide, the steps are irregular in length and direction, and the path wanders. It is not caused by weakness of the muscles, which is what separates it from other abnormal walking patterns.
What does it look like?
The feet are planted further apart than usual, which widens the base and buys stability. Steps land unevenly, some short and some overshooting, and the body veers off the intended line. Turning is particularly difficult and often ends in a stagger. Arms may be held out slightly. The pattern is frequently described as looking like drunkenness, and that comparison is exact rather than loose: alcohol depresses the cerebellum, the same structure most often responsible.
What causes it?
| Site of the problem | How it shows | Typical causes |
|---|---|---|
| Cerebellum | Wide based, veering, no better with eyes open | Stroke, tumor, alcohol, inherited ataxias |
| Position sense pathways | Stamping steps, much worse in the dark | Nerve damage, low vitamin B12 |
| Balance organ of the inner ear | Veering to one side, with spinning sensation | Inner ear disease |
How is one type told from another?
The simplest distinction turns on vision. Someone whose problem lies in the position sense pathways is using sight to compensate, so closing the eyes or walking in a dark room makes the unsteadiness dramatically worse. Someone whose cerebellum is damaged is barely affected by closing the eyes, because the fault lies in the coordinating machinery rather than in the incoming information. Other clues accompany each: slurred speech and jerky eye movements point toward the cerebellum, while numbness and absent reflexes point toward the nerves.
What else can look like it?
Several other gait patterns are distinct once seen. A shuffling gait with small steps and reduced arm swing suggests Parkinson disease. A high stepping gait, lifting the knee to clear a foot that drops, suggests a nerve palsy. A gait that varies from moment to moment, improves when attention is elsewhere and does not match any recognized pattern raises the possibility of a functional disorder, which has psychological rather than structural origins and is a positive diagnosis rather than one made by exclusion.
Also known as
Used in a sentence
The neurological examination documented a broad based ataxic gait with difficulty on turning.
Good to know
Ataxic gait reflects failed coordination rather than weakness, and whether closing the eyes worsens it separates a problem of position sense from one of the cerebellum.
Word origin
Where “ataxic gait” comes from
Ataxic derives from the Greek ataxia, meaning lack of order, from a-, meaning without, and taxis, meaning arrangement.