Human Phenotype Ontology 
Parent Node:
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Abnormal muscle tone (HP:0003808)help
..Starting node
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Muscular hypotonia (HP:0001252)help
Term ID:1252
Name:Muscular hypotonia
Definition:Muscular hypotonia is an abnormally low muscle tone (the amount of tension or resistance to movement in a muscle), often involving reduced muscle strength. Hypotonia is characterized by a diminished resistance to passive stretching.
Comments:
Reference:HP:0001252
MSeqDR-LSDB(LS)
& Disease (OMIM):
1. LS OMIM: #124000 MITOCHONDRIAL COMPLEX III DEFICIENCY,..
2. LS OMIM: #201450 ACYL-COA DEHYDROGENASE, MEDIUM-CHAIN,..
3. LS OMIM: #203700 MITOCHONDRIAL DNA DEPLETION SYNDROME ..
4. LS OMIM: #212138 CARNITINE-ACYLCARNITINE TRANSLOCASE D..
5. LS OMIM: #212140 CARNITINE DEFICIENCY, SYSTEMIC PRIMAR..
6. LS OMIM: #212350 SENGERS SYNDROME;;MITOCHONDRIAL DNA D..
7. LS OMIM: #220110 MITOCHONDRIAL COMPLEX IV DEFICIENCY;;..
8. LS OMIM: #220111 LEIGH SYNDROME, FRENCH CANADIAN TYPE;..
9. LS OMIM: #237300 CARBAMOYL PHOSPHATE SYNTHETASE I DEFI..
10. LS OMIM: #238970 HYPERORNITHINEMIA-HYPERAMMONEMIA-HOMO..
11. LS OMIM: #245400 MITOCHONDRIAL DNA DEPLETION SYNDROME ..

Warning: 10 out of 956 matches reported due to space limit
                  super
       Child Nodes:
........expandAppendicular hypotonia (HP:0012389) help
........expandFacial hypotonia (HP:0000297) help
........expandGeneralized hypotonia (HP:0001290) help
........expandInfantile muscular hypotonia (HP:0008947) help
........expandMuscular hypotonia of the trunk (HP:0008936) help
........expandNeonatal hypotonia (HP:0001319) help
........expandOral motor hypotonia (HP:0030190) help
........expandSevere muscular hypotonia (HP:0006829) help

 Sister Nodes: 
..expandCentral hypotonia (HP:0011398) help
..expandHypertonia (HP:0001276) help
 

Human Phenotype Ontology(HPO) is developed by the Human Phenotype Ontology Consortium.