| HP:0000006 | Autosomal dominant inheritance | "A mode of inheritance that is observed for traits related to a gene encoded on one of the autosomes (i.e., the human chromosomes 1-22) in which a trait manifests in heterozygotes. In the context of medical genetics, an autosomal dominant disorder is caused when a single copy of the mutant allele is present. Males and females are affected equally, and can both transmit the disorder with a risk of 50% for each child of inheriting the mutant allele." [HPO:curators] |
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| HP:0000007 | Autosomal recessive inheritance | "A mode of inheritance that is observed for traits related to a gene encoded on one of the autosomes (i.e., the human chromosomes 1-22) in which a trait manifests in homozygotes. In the context of medical genetics, autosomal recessive disorders manifest in homozygotes (with two copies of the mutant allele) or compound heterozygotes (whereby each copy of a gene has a distinct mutant allele)." [HPO:curators] |
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| HP:0000365 | Hearing loss | |
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| HP:0000718 | Aggressive behavior | "Aggressive behavior can denote verbal aggression, physical aggression against objects, physical aggression against people, and may also include aggression towards oneself." [HPO:curators] |
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| HP:0000737 | Irritability | |
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| HP:0001112 | Leber optic atrophy | |
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| HP:0001256 | Mental retardation, mild | "Mild mental retardation is defined as an intelligence quotient (IQ) in the range of 50-69." [HPO:curators] |
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| HP:0001260 | Dysarthria | "Dysarthric speech is a general description referring to a neurological speech disorder characterized by poor articulation. Depending on the involved neurological structures, dysarthria may be further classified as spastic, flaccid, ataxic, hyperkinetic and hypokinetic, or mixed." [HPO:curators] |
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| HP:0001263 | Developmental retardation | "A delay in the achievement of motor or mental milestones manifested prior to age 18 and generally associated with lifelong mental and/or physical impairments." [HPO:curators] |
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| HP:0001268 | Mental deterioration | |
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| HP:0001326 | EEG shows generalized and focal spike and wave complexes | |
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| HP:0001336 | Myoclonus | "Very brief, involuntary random muscular contractions occurring at rest, in response to sensory stimuli, or accompanying voluntary movements." [HPO:curators] |
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| HP:0001730 | Progressive hearing loss | |
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| HP:0002121 | Absence seizures | "Recurrent absence seizures are `generalized seizures` (HP:0002197) that are characterized by a sudden cessation of motor activity and by a blank facial expression with flickering of the eyelids. There is no convulsive muscular activity or loss of postural control." [HPO:probinson] |
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| HP:0002123 | Myoclonic seizures | "Myoclonic seizures are sudden, brief losses of consciousness and postural tone not associated with tonic muscular contractions. Myoclonic seizures may involve one body part or the entire body. In the latter case, the myoclonic seizure is accompanied by a violent fall but not by loss of consciousness." [HPO:curators] |
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| HP:0002373 | Febrile seizures | "Febrile seizures are convulsions induced by a fever in infants or small children and are generally characterized by loss of consciousness and tonic-clonic movements. Most febrile seizures last a minute or two." [HPO:curators] |
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| HP:0002376 | Developmental regression | |
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| HP:0002463 | Language impairment | |
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| HP:0003677 | Slow progression | |
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| HP:0007018 | Attention deficit hyperactivity disorder | "Attention deficit hyperactivity disorder (ADHD) manifests at age 2-3 years or by first grade at the latest. The main symptoms are distractibility, impulsivity, hyperactivity, and often trouble organizing tasks and projects, difficulty going to sleep, and social problems from being aggressive, loud, or impatient." [HPO:curators] |
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| HP:0007207 | Seizures, tonic-clonic, photosensitive | |
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| HP:0010862 | Delayed fine motor development | "A type of `motor retardation` characterized by an delay in acquiring the ability to control the fingers and hands." [HPO:probinson] |
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