| 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:0000252 | Microcephaly | "Microcephaly is a neurodevelopmental disorder in which the circumference of the head is more than two standard deviations smaller than the age- and gender-dependent norm." [HPO:curators] |
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| HP:0000473 | Torticollis | |
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| HP:0000666 | Nystagmus, horizontal | |
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| HP:0000668 | Hypodontia | "Hypodontia describes a situation when there are fewer than the normal number of teeth, whereby 6 teeth or fewer teeth are missing (oligodontia refers to the condition of missing more than 6 teeth and the congenital absence of all teeth is called anodontia)." [HPO:curators] |
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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:0001257 | Spasticity | "A motor disorder characterized by a velocity-dependent increase in tonic stretch reflexes with increased muscle tone, exaggerated (hyperexcitable) tendon reflexes." [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: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: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:0002059 | Cerebral atrophy | |
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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:0002072 | Chorea | "Chorea (Greek for dance ) refers to widespread arrhythmic involuntary movements of a forcible, jerky and restless fashion." [HPO:curators] |
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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:0002169 | Clonus | |
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| HP:0002317 | Unsteady gait | |
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| HP:0002359 | Frequent falls | |
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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:0002395 | Lower limb hyperreflexia | |
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| HP:0002497 | Spastic ataxia | |
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| HP:0002500 | Abnormality of the cerebral white matter | |
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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:0003693 | Distal amyotrophy | "Muscular atrophy affecting muscles in the distal portions of the extremities." [HPO:curators] |
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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:0007663 | Decreased central vision | |
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| HP:0009830 | Peripheral neuropathy | "Peripheral neuropathy is a general term for any disorder of the peripheral nervous system. The main clinical features used to classify peripheral neuropathy are distribution, type (mainly demyelinating versus mainly axonal), duration, and course." [HPO:curators] |
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| HP:0011096 | Peripheral demyelination | "A loss of myelin from the internode regions along myelinated nerve fibers of the peripheral nervous system." [HPO:probinson] |
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| HP:0025357 | Erratic myoclonus | "A type of myoclonus in which the myoclonias shift from body region to another in a random and asynchronous fashion. Erratic myoclonus can affect the face or limbs, are brief, single or repetitive, very frequent and nearly continuous." [] |
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| HP:0030051 | Tip-toe gait | "An abnormal gait pattern characterized by the failue of the heel to contact the floor at the onset of stance during gait." [pmid:24757457] |
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| HP:0030187 | Titubation | "Nodding movement of the head or body." [HPO:probinson, pmid:4821687] |
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