Abasia refers to a person's inability to walk upright, or straight while at the same maintaining full control and coordination of the lower extremities while lying flat. It is a type of psychogenic gait disturbance.
A related condition that goes along with abasia is called astasis which refers to the inability of a person to stand upright despite having full control on the motor aspects of the limbs while lying flat.
The cause is not known.
Symptoms of astasia abasia include difficulty standing upright and or difficulty walking in a coordinated manner.
Diagnosis is through history, physical examination and also imaging studies such as CT scan, and or MRI scan.
Treatment depends on the cause.