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Related to atactic: syndiotactic polymer


pertaining to or characterized by ataxia; marked by incoordination or irregularity.




(a-tak'se-a, a?) [Gr. ataxia, lack of order]
Defective muscular coordination, esp. that manifested when voluntary muscular movements are attempted. atacticataxic (a-tak'tik, a?) (a-tak'sik, a?), adjective

alcoholic ataxia

In chronic alcoholism, ataxia due to a loss of proprioception.

bulbar ataxia

Ataxia due to a lesion in the medulla oblongata or pons.

cerebellar ataxia

Ataxia due to cerebellar disease.

choreic ataxia

Ataxia in patients with chorea.

Friedreich ataxia

See: Friedreich, Nikolaus

hysterical ataxia

Ataxia of leg muscles due to somatoform disorders.

limb ataxia

Inability to make smooth, coordinated movements of an arm or a leg, as when trying to touch an examiner's finger with an index finger or when trying to run one's right or left heel straight down the opposite shin. Limb ataxia is present when a limb that has no deficits in strength wobbles during movement or misses its target.

locomotor ataxia

Tabes dorsalis.

Marie ataxia

See: Marie, Pierre Marie

motor ataxia

Inability to perform coordinated muscle movements.

optic ataxia

Loss of hand-eye coordination in reaching for an object one has seen, due to damage to visually dedicated regions of the cerebral cortex.

sensory ataxia

Ataxia due to interference in conduction of sensory responses, esp. proprioceptive impulses from muscles. The condition becomes aggravated when the eyes are closed.
See: Romberg sign; spinal ataxia

spinal ataxia

Ataxia due to spinal cord disease.

static ataxia

Loss of deep sensibility, causing inability to preserve equilibrium in standing.


pertaining to or characterized by ataxia; marked by incoordination or irregularity.
References in periodicals archive ?
During heating, cold crystallization occurs, what means that an atactic molecular structure is excluded.
The data shown in table 1 offer a partial illustration of the effect of chemical structure on the glass transition temperature of atactic polymers.
Modified bitumen, which is an asphalt modified with either Styrene-Butadiene-Styrene (SBS) or Atactic Polypropylene (APP) and a polyester nonwoven mat has become the preferred roofing system over BUR, in both North America and Europe.
Aristech Chemical, Pittsburgh, PA, announced that effective July 1, BassTech Rosins, Englewood, NJ, will be the sole outlet for all of Aristech's atactic polypropylene, which is produced as a by-product at the company's La-Porte, TX facility.
The company's largest product line is atactic polypropylene ("APP") modified bitumen roofing membranes.
Amoco is still at the laboratory stage in development of elastomeric homopolymer PP (EHPP) that combines isotactic and atactic PP in the same polymer chain.
Tenders are invited for providing and laying water proofing treatment with app atactic polypropylene polymer at various auxiliary building at stps plant site
The used PS is a common industrial PS and is atactic PS with no order or regularity in the phenyl groups.
In the early 1980's the modified bitumen (MB) method came to North America; the system consists of asphalt modified with either Atactic Polypropylene (APP) or Styrene-Butadiene-Styrene (SBS) along with a polyester nonwoven mat substrate, which can be either spunbonded, needlepunched, fiberglass-based or a
The companies' largest product line is atactic polypropylene ("APP") modified bitumen roofing membranes.
Added to this is the absence of atactic byproducts, resulting in lower extractables than current "CR" or "vis-broken" resins, as well as lower die drool.
atactic polystyrene) are typically chosen for foaming because the temperature-dependent rheology is relatively easy to control, as lower temperatures will increase the melt strength.