dysmetria


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dysmetria

 [dis-me´tre-ah]
inability to properly direct or limit motions.

dys·met·ri·a

(dis-mē'trē-ă, -met'rē-ă),
An aspect of ataxia, in which the ability to control the distance, power, and speed of an act is impaired. Usually used to describe abnormalities of movement caused by cerebellar disorders.
See also: hypermetria, hypometria.
[dys- + G. metron, measure]

dysmetria

/dys·me·tria/ (dis-me´tre-ah) disturbance of the power to control the range of movement in muscular action.

dysmetria

[dismē′trē·ə]
Etymology: Gk, dys + metron, measure
an abnormal condition that prevents the affected individual from properly measuring distances associated with muscular acts and from controlling muscular action. It is associated with cerebellar lesions and typically characterized by overestimating or underestimating the range of motion needed to place the limbs correctly during voluntary movement. A normal person with eyes closed can move the arms from a position of 90 degrees of flexion to a position over the head and then return them to the 90-degree position; a person with dysmetria is unable to perform this test accurately. See also hypermetria, hypometria.

dys·met·ri·a

(dis-mē'trē-ă)
An aspect of ataxia, in which the ability to control the distance, power, and speed of an act is impaired; used to describe abnormalities of movement caused by cerebellar disorders.
See also: hypermetria, hypometria

dysmetria

An inability to adjust movements accurately, without visual assistance, so as to achieve their object. Dysmetria is a sign of malfunction of the CEREBELLUM.

dysmetria

inability to gauge distance and speed during gait, and/or strength and velocity of voluntary movement; associated with cerebellar dysfunction (see Table 1)
Table 1: Characteristic limb effects of cerebellar lesions
CharacteristicMuscular effects
DyssynergyMuscular decomposition
Accessory muscles used to achieve voluntary movements
Wide arc movements and past pointing
Aesthenia
Hyporeflexia
DysrhythmiaAbnormal timing and coupling of voluntary movements
Abnormal timing and coupling of voluntary movements during gait
DysmetriaThe loss of ability to gauge distance and speed, and strength and velocity of voluntary movement
The loss of ability to gauge distance and speed, and strength and velocity of voluntary movement during gait
Abnormal gaitUncoordinated ataxic gait
Wide-based gait
Slow, jerky, irregular cadence
Variation of stride length and foot placement from step to step, often with loss of balance
'Double tap' foot sounds, where foot contact occurs audibly in two phases: heel strike and toe contact
Constant postural adjustment

dys·met·ri·a

(dis-mē'trē-ă)
An aspect of ataxia, in which the ability to control the distance, power, and speed of an act is impaired.
[dys- + G. metron, measure]

dysmetria (dismē´trēə),

n the loss of ability to gauge distance, speed, or power of movement associated with muscle function; e.g., the patient is unable to control the force of closure and strikes the opposite occluding teeth with greater vigor than necessary.

dysmetria

inability to properly direct or limit motions. A characteristic of cerebellar lesions.
References in periodicals archive ?
A repeat EFV level done 7 days after stopping the drug showed persistently high levels (49 000 ng/mL), but the patient was able to walk unsupported and the dysmetria and dysdidadokinesia had improved.
Defining the phenotype of schizophrenia: cognitive dysmetria and its neural mechanisms.
Cognitive dysmetria as an integrative theory of schizophrenia: a dysfunction in cortical-subcortical-cerebellar circuitry?
Patient may also have fatigue unrelated to physical activity; Uhthoff's phenomenon where the patient's symptoms worsen with activity that increases body temperature; and features of cerebellar dysfunction such as gait imbalance, dysmetria, decomposition of complex movements, intention tremors, scanning speech, and truncal ataxia.
In neurological examination, distinct quadriparesis, ataxia, dysmetria, dysdiadochokinesia, hypoesthesia of the 4 extremities, and bilateral abolished deep tendon reflex with indifferent plantar responses were determined.
After 2 weeks, the animal showed severe dysmetria of the extremities without obvious myoclonia.
The cerebellar cognitive affective syndrome: clinical correlations of the dysmetria of thought hypothesis.
The cerebellum is concerned with hypometric and hypermetric states and produces dysmetria of thought.
paralysis, spasticity, rigidity, tremor, dysmetria, hyperkinetic) can lead to secondary movement problems that do not result directly from the nervous system lesion.
She had no tremor but had mild bilateral dysmetria and severe gait ataxia requiring full assistance to ambulate.
Therefore, the presence of mild facial and lingual weakness and / or concomitant nonverbal oral apraxia were admitted, but not the existence of abnormal reflexes, significant alterations in muscle tone, involuntary movements, dysmetria and / or kinetic tremors.
During hospitalization he began to suffer atypical neurological symptoms, such as right eyelid ptosis, dysmetria, ataxia and disequilibrium, suggesting a nervous system disorder, namely of the right oculomotor nerve and the cerebellum.