Human Phenotype Ontology 
Parent Node:
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Mental deterioration (HP:0001268)help
..Starting node
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Dementia (HP:0000726)help
Term ID:726
Name:Dementia
Definition:A loss of global cognitive ability of sufficient amount to interfere with normal social or occupational function. Dementia represents a loss of previously present cognitive abilities, generally in adults, and can affect memory, thinking, language, judgment, and behavior.
Comments:
Reference:HP:0000726
MSeqDR-LSDB(LS)
& Disease (OMIM):
1. LS OMIM: #203700 MITOCHONDRIAL DNA DEPLETION SYNDROME ..
2. LS OMIM: #540000 MITOCHONDRIAL MYOPATHY, ENCEPHALOPATH..
3. LS OMIM: #609286 PROGRESSIVE EXTERNAL OPHTHALMOPLEGIA ..
4. LS OMIM: #614298 NEURODEGENERATION WITH BRAIN IRON ACC..
5. LS OMIM: #615889 LEUKOENCEPHALOPATHY, PROGRESSIVE, WIT..
6. LS OMIM: ALZHEIMER DISEASE, SUSCEPTIBILITY TO, MITOCHO..
7. LS OMIM: KEARNS-SAYRE SYNDROME..
8. LS OMIM: LEBER OPTIC ATROPHY AND DYSTONIA..
9. LS OMIM: NEUROPATHY, ATAXIA, AND RETINITIS PIGMENTOSA..
10.      OMIM: #105210 AMYLOIDOSIS, HEREDITARY, TRANSTHYRETI..
11.      OMIM: #109150 MACHADO-JOSEPH DISEASE; MJD;;SPINOCER..

Warning: 10 out of 123 matches reported due to space limit
                  super
       Child Nodes:
........expandFrontal lobe dementia (HP:0000727) help
........expandFrontolimbic dementia (HP:0002439) help
........expandFrontotemporal dementia (HP:0002145) help
........expandSubcortical dementia (HP:0007123) help

 Sister Nodes: 
..expandMotor deterioration (HP:0002333) help
..expandProgressive neurologic deterioration (HP:0002344) help
..expandPsychomotor deterioration (HP:0002361) help
..expandSocial and occupational deterioration (HP:0007086) help
 

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