| 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:0000490 | Deep set eyes | |
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| HP:0000504 | Abnormality of vision | "Abnormality of eyesight (visual perception)." [HPO:curators] |
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| HP:0000738 | Hallucinations | |
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| HP:0000980 | Pallor | |
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| HP:0001041 | Facial erythema | |
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| HP:0001249 | Mental retardation | |
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| HP:0001250 | Seizures | "Seizures are an intermittent `abnormality of the central nervous system` (FMA:HP:0002011) due to a sudden, excessive, disorderly discharge of cerebral neurons and characterized clinically by some combination of disturbance of sensation, loss of consciousness, impairment of psychic function, or convulsive movements." [HPO:probinson] |
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| HP:0001252 | Muscular hypotonia | "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." [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:0001266 | Choreoathetosis | |
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| HP:0001270 | Motor retardation | |
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| HP:0001276 | Hypertonia | |
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| HP:0001285 | Spastic tetraparesis | "Spastic weakness affecting all four limbs." [HPO:curators] |
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| HP:0001290 | Generalized hypotonia | "Generalized muscular hypotonia (abnormally low muscle tone)." [HPO:curators] |
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| HP:0001332 | Dystonia | "An abnormally increased muscular tone that causes fixed abnormal postures. There is a slow, intermittent twisting motion that leads to exaggerated turning and posture of the extremities and trunk." [HPO:curators] |
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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:0001425 | Heterogeneous | |
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| HP:0002017 | Nausea and vomiting | |
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| HP:0002059 | Cerebral atrophy | |
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| HP:0002069 | Generalized tonic-clonic seizures | "Generalized tonic-clonic seizures are `generalized seizures` (HP:0002197) in which the patient suddenly loses conciousness, the eyes roll back, and the entire body musculature undergoes tonic contractions. In the clonic phase of the seizure, there are rhythmic contractions of the musculature alternating with relaxation of all muscle groups. Loss of sphincter control during the seizure is common. This form of seizure was formerly commonly called grand mal seizure." [HPO:curators] |
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| HP:0002076 | Migraine | |
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| HP:0002079 | Hypoplasia of the corpus callosum | "Underdevelopment of the corpus callosum." [HPO:curators] |
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| HP:0002104 | Apnea | "Lack of breathing with no movement of the respiratory muscles and no exchange of air in the lungs. This term refers to a disposition to have recurrent episodes of apnea rather than to a single event." [HPO:curators] |
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| HP:0002181 | Cerebral edema | "Abnormal accumulation of fluid in the brain." [HPO:curators] |
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| HP:0002266 | Focal clonic seizures | |
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| HP:0002354 | Memory impairment | |
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| HP:0002357 | Dysphasia | |
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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:0002411 | Myokymia | |
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| HP:0002453 | Abnormality of the globus pallidus | |
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| HP:0002521 | Hypsarrhythmia | "Hypsarrhythmia is abnormal interictal high amplitude waves and a background of irregular spikes demonstrated by electroencephalography (EEG)." [HPO:curators] |
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| HP:0002540 | Inability to walk | |
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| HP:0003593 | Early onset | |
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| HP:0003623 | Onset in neonatal period | |
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| HP:0003812 | Phenotypic variability | |
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| HP:0004372 | Reduced consciousness/confusion | |
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| HP:0007015 | Poor fine and gross motor coordination | |
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| HP:0010818 | Tonic seizures | "A type of `seizure` (HP:0001250) characterized by a sudden increase in muscle tone whereby the body, arms, or legs make sudden stiffening movements and consciousness is usually preserved. Tonic seizures can occur during sleep. Tonic seizures usually affect both sides of the body, and cause a fall if the affected person was standing when the seizure started." [HPO:probinson] |
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| HP:0010851 | EEG: burst suppression | "The burst suppression pattern in electroencephalography refers to a characteristic periodic pattern of low voltage (<10 microvolts) suppressed background and a relatively shorter pattern of higher amplitude slow, sharp, and spiking complexes." [HPO:probinson] |
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| HP:0011097 | Epileptic spasms | "A sudden flexion, extension or mixed extension-flexion of predominantly proximal and truncal muscles which is usually more sustained than a myoclonic movement but not as sustained as a tonic seizure." [HPO:jalbers] |
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| HP:0011968 | Feeding difficulties | "Impaired ability to eat related to problems gathering food and getting ready to suck, chew, or swallow it." [ISCA:eriggs] |
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| HP:0012378 | Fatigue | "A subjective feeling of tiredness characterized by a lack of energy and motivation." [HPO:probinson] |
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| HP:0012534 | Dysesthesia | "Abnormal sensations with no apparent physical cause that are painful or unpleasant." [ORCID:0000-0001-5208-3432] |
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| HP:0012736 | Profound global developmental delay | "A profound delay in the achievement of motor or mental milestones in the domains of development of a child." [DDD:hvfirth] |
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| HP:0100543 | Cognitive impairment | "Abnormality in the process of thought including the ability to process information." [HPO:sdoelken] |
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| HP:0100660 | Dyskinesis | "A movement disorder which consists of effects including diminished voluntary movements and the presence of involuntary movements." [HPO:sdoelken] |
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| HP:0200134 | Epileptic encephalopathy | |
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