From HPO
Cerebellar ataxia- MedGen UID:
- 849
- •Concept ID:
- C0007758
- •
- Disease or Syndrome
Cerebellar ataxia refers to ataxia due to dysfunction of the cerebellum. This causes a variety of elementary neurological deficits including asynergy (lack of coordination between muscles, limbs and joints), dysmetria (lack of ability to judge distances that can lead to under- or overshoot in grasping movements), and dysdiadochokinesia (inability to perform rapid movements requiring antagonizing muscle groups to be switched on and off repeatedly).
Fasciculations- MedGen UID:
- 5124
- •Concept ID:
- C0015644
- •
- Sign or Symptom
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.
Polyhydramnios- MedGen UID:
- 6936
- •Concept ID:
- C0020224
- •
- Pathologic Function
The presence of excess amniotic fluid in the uterus during pregnancy.
Hypertonia- MedGen UID:
- 10132
- •Concept ID:
- C0026826
- •
- Finding
A condition in which there is increased muscle tone so that arms or legs, for example, are stiff and difficult to move.
Babinski sign- MedGen UID:
- 19708
- •Concept ID:
- C0034935
- •
- Finding
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.
Hyperreflexia- MedGen UID:
- 57738
- •Concept ID:
- C0151889
- •
- Finding
Hyperreflexia is the presence of hyperactive stretch reflexes of the muscles.
Abnormal pyramidal sign- MedGen UID:
- 68582
- •Concept ID:
- C0234132
- •
- Sign or Symptom
Functional neurological abnormalities related to dysfunction of the pyramidal tract.
Ankle clonus- MedGen UID:
- 68672
- •Concept ID:
- C0238651
- •
- Finding
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.
Spastic tetraparesis- MedGen UID:
- 658719
- •Concept ID:
- C0575059
- •
- Disease or Syndrome
Spastic weakness affecting all four limbs.
Myokymia- MedGen UID:
- 146882
- •Concept ID:
- C0684219
- •
- Sign or Symptom
Myokymia consists of involuntary, fine, continuous, undulating contractions that spread across the affected striated muscle.
Cerebellar atrophy- MedGen UID:
- 196624
- •Concept ID:
- C0740279
- •
- Disease or Syndrome
Cerebellar atrophy is defined as a cerebellum with initially normal structures, in a posterior fossa with normal size, which displays enlarged fissures (interfolial spaces) in comparison to the foliae secondary to loss of tissue. Cerebellar atrophy implies irreversible loss of tissue and result from an ongoing progressive disease until a final stage is reached or a single injury, e.g. an intoxication or infectious event.
Overlapping toe- MedGen UID:
- 182531
- •Concept ID:
- C0920299
- •
- Anatomical Abnormality
Describes a foot digit resting on the dorsal surface of an adjacent digit when the foot is at rest. Initially clawing may be dynamic and only noticeable on walking. Over time the plantar plate tears, subluxation occurs at the metatarsophalangeal joint (MTPJ), and the deformity becomes permanent.
Lower limb spasticity- MedGen UID:
- 220865
- •Concept ID:
- C1271100
- •
- Finding
Spasticity (velocity-dependent increase in tonic stretch reflexes with increased muscle tone and hyperexcitable tendon reflexes) in the muscles of the lower limbs, hips, and pelvis
Exaggerated startle response- MedGen UID:
- 329357
- •Concept ID:
- C1740801
- •
- Finding
An exaggerated startle reaction in response to a sudden unexpected visual or acoustic stimulus, or a quick movement near the face.
Increased serum lactate- MedGen UID:
- 332209
- •Concept ID:
- C1836440
- •
- Finding
Abnormally increased level of blood lactate (2-hydroxypropanoic acid). Lactate is produced from pyruvate by lactate dehydrogenase during normal metabolism. The terms lactate and lactic acid are often used interchangeably but lactate (the component measured in blood) is strictly a weak base whereas lactic acid is the corresponding acid. Lactic acidosis is often used clinically to describe elevated lactate but should be reserved for cases where there is a corresponding acidosis (pH below 7.35).
Axial hypotonia- MedGen UID:
- 342959
- •Concept ID:
- C1853743
- •
- Finding
Muscular hypotonia (abnormally low muscle tone) affecting the musculature of the trunk.
Absent speech- MedGen UID:
- 340737
- •Concept ID:
- C1854882
- •
- Finding
Complete lack of development of speech and language abilities.
Low-set, posteriorly rotated ears- MedGen UID:
- 387834
- •Concept ID:
- C1857486
- •
- Finding
Ears that are low-set and posteriorly rotated.