<unk>  (from Greek: a-, without and basis, step) is the inability to walk due to impaired muscle coordination. The American Heritage Medical Dictionary defines<unk>  as "Inability to walk due to impaired muscular coordination.a" 
The term covers a spectrum of medical disorders such as:
choreic<unk> : caused by chorea of the legs
paralytic<unk> : caused by paralysis of the leg muscles
spastic<unk> : caused by spastic stiffening of the leg muscles
trembling<unk> : caused by trembling of the legs<unk>  is frequently accompanied by astasis, an inability to stand, see Astasia-abasia.
Abasia
Stridor
Onychoptosis
Egophony
Galanthus
Brain zap
Anismus
Boat hemorrhages