| 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:0000529 | Progressive visual loss | |
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| HP:0000545 | Myopia | |
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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:0000648 | Optic atrophy | |
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| HP:0001258 | Spastic paraplegia | |
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| HP:0001272 | Cerebellar atrophy | |
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| HP:0001310 | Dysmetria | |
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| HP:0001371 | Contractures | |
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| HP:0001761 | Pes cavus | |
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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:0002059 | Cerebral atrophy | |
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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:0002180 | Neurodegeneration | |
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| HP:0002273 | Tetraparesis | |
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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:0002411 | Myokymia | |
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| HP:0002486 | Myotonia | "Myotonia is characterized by an abnormally slow relaxation of the muscles after voluntary contraction or electrical stimulation. During physical examination, myotonia may be elicited by asking the patient to make a tight fist and then quickly open the hand." [HPO:curators] |
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| HP:0002599 | Head titubation | |
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| HP:0003487 | Babinski sign | "Upturning of the big toe (and sometimes fanning of the other toes) in response to stimulation of the sole of the foot. If the Babinski sign is present it can indicate damage to the corticospinal tract." [HPO:curators] |
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| HP:0003676 | Progressive disorder | |
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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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