Table 1

Neuromuscular causes for head ptosis

Site of pathologyDisorders
        Motor neuronAmyotrophic lateral sclerosis1,2
Postpolio syndrome3
        Peripheral nerveChronic inflammatory polyneuropathy4
        Neuromuscular junctionMyasthenia gravis1,2
        Muscle
    (a) InflammatoryPolymyositis1,2
    (b) Congenital/hereditaryInclusion body myositis2
Nemaline myopathy5,6
Mitochondrial myopathy7
Carnithine deficiency8
Unspecified congenital myopathy9
    (c) Endocrine/metabolicFacioscapulohumeral dystrophy1
Cushing syndrome7
Hypothyroid myopathy10
Myotonic dystrophy with severe hypothyroidism2
Severe hypokalaemic myopathy11