Symptom Information: Sort according to HPO 

1
(HPO:0001263) Global developmental delay 853 / 7739
2
(HPO:0002123) Generalized myoclonic seizures 62 / 7739
3
(HPO:0002510) Spastic tetraplegia 54 / 7739
4
(HPO:0005484) Postnatal microcephaly 32 / 7739
5
(OMIM) Early-onset myoclonic seizures 1 / 7739
6
(HPO:0000007) Autosomal recessive inheritance 2538 / 7739
7
(HPO:0003593) Infantile onset 249 / 7739