| 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:0000503 | Tortuosity of conjunctival vessels | |
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| HP:0000508 | Ptosis | "Drooping of the eyelid." [HPO:curators] |
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| HP:0000518 | Cataract | "A cataract is an opacity or clouding that develops in the crystalline `lens` (FMA:58241) of the eye or in its `capsule` (FMA:58881)." [HPO:probinson] |
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| HP:0000608 | Macular degeneration | |
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| HP:0000639 | Nystagmus | "Rhythmic, involuntary oscillations of one or both eyes related to abnormality in fixation, conjugate gaze, or vestibular mechanisms." [HPO:curators] |
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| HP:0000641 | Dysmetric saccades | |
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| HP:0000651 | Diplopia | "Diplopia is a condition in which a single object is perceived as two images, it is also known as double vision." [HPO:curators] |
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| HP:0000666 | Nystagmus, horizontal | |
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| HP:0001152 | Saccadic smooth pursuit | |
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| HP:0001249 | Mental retardation | |
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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:0001272 | Cerebellar atrophy | |
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| HP:0001310 | Dysmetria | |
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| HP:0001347 | Hyperreflexia | "The presence of overactive or overresponsive reflexes." [HPO:curators] |
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| HP:0001348 | Brisk reflexes | |
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| HP:0001350 | Slurred speech | |
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| HP:0001761 | Pes cavus | |
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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:0002070 | Limb ataxia | |
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| HP:0002073 | Progressive cerebellar ataxia | |
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| HP:0002078 | Truncal ataxia | |
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| HP:0002080 | Intention tremor | "An oscillatory cerebellar ataxia that tends to be absent when the limbs are inactive and during the first part of voluntary movement but worsening as the movement continues and greater precision is required (e.g., in touching a target such as the patient s nose or a physician s finger)." [HPO:curators] |
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| HP:0002197 | Generalized seizures | "Recurrent generalized `seizures` (HP:0001250), that is seizures that affect both cerebral hemispheres from the start of the seizure, producing loss of consciousness." [HPO:probinson] |
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| HP:0002380 | Fasciculations | "Fasciculations are observed as small, local, involuntary muscle contractions (twitching) visible under the skin. Fasciculations result from increased irritability of an axon (which in turn is often a manifestation of disease of a motor neuron). This leads to sporadic discharges of all the muscle fibers controlled by the axon in isolation from other motor units." [HPO:curators] |
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| HP:0003457 | Abnormal EMG findings | "Abnormal results of investigations using electromyography (EMG)." [HPO:curators] |
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| HP:0007240 | Progressive gait ataxia | |
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| HP:0007338 | Hypermetric saccades | |
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| HP:0008969 | Leg muscle stiffness | |
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| HP:0010545 | Downbeat nystagmus | "A type of vertical nystagmus that is present in the straight-ahead position of gaze." [HPO:curators] |
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| HP:0011448 | Ankle clonus | "Clonus is an involuntary tendon reflex that causes repeated flexion and extension of the foot. Ankle clonus is tested by rapidly flexing the foot upward." [HPO:probinson] |
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| HP:0012379 | Abnormal enzyme/coenzyme activity | "An altered ability of any enzyme or their cofactors to act as catalysts." [HPO:probinson, MP:0005584] |
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