| 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:0000508 | Ptosis | "Drooping of the eyelid." [HPO:curators] |
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| HP:0000565 | Esotropia | |
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| HP:0000571 | Hypometric saccades | |
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| HP:0000666 | Nystagmus, horizontal | |
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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: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:0001271 | Polyneuropathy | "A generalized disorder of peripheral nerves." [HPO:curators] |
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| HP:0001272 | Cerebellar atrophy | |
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| HP:0001290 | Generalized hypotonia | "Generalized muscular hypotonia (abnormally low muscle tone)." [HPO:curators] |
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| HP:0001310 | Dysmetria | |
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| HP:0001337 | Tremor | "An unintentional, oscillating to-and-fro muscle movement." [HPO:curators] |
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| HP:0001344 | Absent speech development | |
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| HP:0001347 | Hyperreflexia | "The presence of overactive or overresponsive reflexes." [HPO:curators] |
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| HP:0001763 | Pes planus | "A condition in which the arch of the foot is flat, with the entire sole of the foot being in near-complete contact with the ground." [HPO:curators] |
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| HP:0002066 | Gait ataxia | "Impairment of the ability to coordinate the movements required for normal walking." [HPO:curators] |
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| HP:0002075 | Dysdiadochokinesis | "An inability to perform rapidly alternating movements, such as rhythmically tapping the fingers on the knee, generally related to a cerebellar lesion." [HPO:curators] |
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| HP:0002119 | Ventriculomegaly | |
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| HP:0002406 | Limb dysmetria | |
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| HP:0003593 | Early onset | |
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| HP:0003677 | Slow progression | |
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| HP:0003698 | Difficulty standing | |
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| HP:0004322 | Decreased body height | "A height below that which is expected according to age and gender norms. Although there is no universally accepted definition of short stature, many refer to "short stature" as height more than 2 standard deviations below the mean for age and gender (or below the 3rd percentile for age and gender dependent norms)." [HPO:curators] |
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| HP:0006951 | Retrocerebellar cyst | |
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| HP:0007068 | Inferior vermis hypoplasia | |
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| HP:0007256 | Mild pyramidal signs | |
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| HP:0007979 | Gaze-evoked horizontal nystagmus | "Horizontal nystagmus made apparent by looking to the right or to the left." [HPO:curators] |
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| HP:0011347 | Abnormality of ocular abduction | "An abnormality involving the movement of the eye outwards." [HPO:probinson] |
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