It is mostly unknown what causes<unk> , but in many cases the patient also has other medical problems such as Parkinson's disease or narcolepsy. Medical agents must be taken into consideration: several psychopharmacological drugs (serotonergic and tricyclic antidepressants, venlafaxine and mirtazapine) and therefore heighten the risk of<unk> . For women, the presence of musculoskeletal disease, heart disease, obstructive sleep apnea, cataplexy, doing physical activities close to bedtime and the presence of a mental<unk>  were significantly associated with having a higher risk of both<unk>  and restless legs syndrome. PLMS seem to find an origin in the spinal cord. In fact, PLMS was suggested to be associated with increased spinal reflexes. Manifestations of PLMS seems to occur mostly in<unk> s associated with dopaminergic dysfunctions. Hypothesis of low ferritin levels in adult population was raised to explain<unk>  where increased RLS severity and increased PLMS were significantly correlated with low ferritin levels. Research evidence suggested iron is possibly contributing to<unk> . Thus, lack of iron may induce inhibition of dopamine formation which might underlie PLMS.
Periodic limb movement disorder
Periodic paralysis
Cramp fasciculation syndrome
Essential tremor
Holmes tremor
Torsion dystonia
Lonomia
Oromandibular dystonia