| 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:0000764 | Axonal degeneration | |
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| HP:0001265 | Hyporeflexia | |
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| HP:0001284 | Areflexia | |
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| HP:0001761 | Pes cavus | |
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| HP:0001765 | Hammer toes | |
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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:0002460 | Distal muscle weakness | "Reduced strength of the distal musculature." [HPO:curators] |
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| HP:0002936 | Distal sensory impairment | |
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| HP:0003376 | Steppage gait | "An abnormal gait pattern that arises from weakness of the pretibial and peroneal muscles due to a lower motor neuron lesion. Affected patients have footdrop and are unable to dorsiflex and evert the foot. The leg is lifted high on walking so that the toes clear the ground, and there may be a slapping noise when the foot strikes the ground again." [HPO:curators] |
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| HP:0003677 | Slow progression | |
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| HP:0003693 | Distal amyotrophy | "Muscular atrophy affecting muscles in the distal portions of the extremities." [HPO:curators] |
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| HP:0003829 | Incomplete penetrance | |
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| HP:0006886 | Decreased distal vibration sense | "A decrease in the ability to perceive vibration in the distal portions of the limbs." [HPO:curators] |
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| HP:0009027 | Foot dorsiflexor weakness | |
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