paralysis /pa·ral·y·sis/ (pah-ral´ĭ-sis) pl. paral´yses loss or impairment of motor function in a part due to lesion of the neural or muscular mechanism; also, by analogy, impairment of sensory function (sensory p.) .
paralysis (p
ral´isis),
paralysis a´gitans Parkinson's disease.
ascending paralysis spinal paralysis that progresses cephalad.
bulbar paralysis progressive bulbar palsy.
compression paralysis that caused by pressure on a nerve.
conjugate paralysis loss of ability to perform some parallel ocular movements.
crossed paralysis , cruciate paralysis that affecting one side of the face and the other side of the body.
decubitus paralysis that due to pressure on a nerve from lying for a long time in one position.
divers' paralysis decompression sickness.
Duchenne's paralysis
Erb-Duchenne paralysis paralysis of the upper roots of the brachial plexus, caused by birth injury.
facial paralysis weakening or paralysis of the facial nerve, as in Bell's palsy.
familial periodic paralysis a rare inherited disorder with recurring attacks of rapidly progressive flaccid paralysis associated with serum potassium levels that are decreased (type I or hypokalemic type), increased (type II or hyperkalemic type), or normal (type III or normokalemic type).
hyperkalemic periodic paralysis see familial periodic p.
hypokalemic periodic paralysis see familial periodic p.
immune paralysis , immunologic paralysis older name for immunologic tolerance.
juvenile paralysis agitans (of Hunt) increased muscle tonus with the characteristic attitude and facies of paralysis agitans, occurring in early life and due to progressive degeneration of the globus pallidus.
Klumpke's paralysis , Klumpke-Dejerine paralysis lower brachial plexus paralysis caused by birth injury, particularly during a breech delivery.
Landry's paralysis acute idiopathic polyneuritis.
mixed paralysis combined motor and sensory paralysis.
motor paralysis paralysis of voluntary muscles.
musculospiral paralysis paralysis of the extensor muscles of the wrist and fingers.
normokalemic periodic paralysis see familial periodic p.
periodic paralysis
1. any of various diseases characterized by episodic flaccid paralysis or muscular weakness.
postepileptic paralysis Todd's p.
progressive bulbar paralysis see under palsy.
pseudobulbar paralysis spastic weakness of the muscles innervated by the cranial nerves, i.e., the facial muscles, pharynx, and tongue, due to bilateral lesions of the corticospinal tract, often accompanied by uncontrolled weeping or laughing.
pseudohypertrophic muscular paralysis see under dystrophy.
sensory paralysis loss of sensation due to a morbid process.
thyrotoxic periodic paralysis recurrent episodes of generalized or local paralysis accompanied by hypokalemia, occurring in association with Graves' disease, especially after exercise or a high carbohydrate or high sodium meal.
Todd's paralysis transient hemiplegia or monoplegia after an epileptic seizure.
vasomotor paralysis cessation of vasomotor control.
| motor paralysis n. Loss of voluntary control of muscular contraction. |
paralysis (p
ral´isis),n 1. the cessation of cell function.
n 2. the loss or impairment of the motor control or function of a part or region.
n 2. the loss or impairment of the motor control or function of a part or region.
paralysis, diplegia
n a loss of motor function in matching body parts (e.g., legs) on each side.
paralysis, facial,
n paralysis of the muscles of facial expression resulting from supranuclear, nuclear, or peripheral nerve disease. With a mild case, when the face is at rest, the disorder is not readily observed. However, during muscular contraction (e.g., wrinkling the forehead, blinking the eyes, pursing the lips, speaking), the disorder is very noticeable. Only one lid may close, and the asymmetry of the oral cavity is pronounced because the normal buccinator muscle contracts and is unopposed by the weakness on the paralyzed side. This imbalance produces a significant asymmetry. The affected side remains smooth, and the normal side shows contraction. See also palsy, Bell's.
paralysis, infantile,
n See poliomyelitis.
paralysis, motor,
n a loss of the power of skeletal muscle contraction, resulting from interruption of some part of the pathway from the cerebrum to the muscle.
paralysis, transient,
n the sudden loss of sensation or ability to move on one side or a single part of the body, which lasts briefly and may or may not recur and is often a symptom of cerebrovascular insufficiency or other underlying serious condition.
paralysis, transient facial,
n a temporary unilateral loss of facial muscle function as a result of inadvertently injecting the parotid gland containing the facial nerve during the inferior nerve block.
paralysis
loss or impairment of motor function in a part due to a lesion of the neural or muscular mechanism; also, by analogy, impairment of sensory function (sensory paralysis). Called also palsy. Motor paralysis may be expressed as flaccid, in the case of lower motor neuron lesion, or spastic, in the case of an upper motor neuron lesion. See also paraplegia, quadriplegia, hemiplegia and paralyses of individual cranial and peripheral nerves.
paralysis of accommodation
paralysis of the ciliary muscles of the eye so as to prevent accommodation.
anal paralysis
manifested by flaccidity and lack of tone of the anal sphincter, and loss of house training restraint in companion animals.
antepartum paralysis
pressure on sciatic nerves by a large fetus in late pregnancy in a cow can cause posterior paralysis that is cured by a cesarean section.
ascending paralysis
spinal paralysis that progresses forwards involving first the hindlimbs then the forelimbs, then the intercostal muscles, then the diaphragm, and finally the muscles of the neck.
birth paralysis
that due to injury received by the neonate at birth.
bladder paralysis
manifested by fullness of the bladder and response to manual pressure. See also motor paralytic urinary bladder.
cage paralysis
central paralysis
any paralysis due to a lesion of the brain or spinal cord.
cerebral paralysis
paralysis caused by some intracranial lesion.
Chastek paralysis
compression paralysis
that caused by pressure on a nerve.
congenital paralysis
paralysis of the newborn. Many cases are due to birth trauma especially when lay persons exert excessive traction. Other causes are enzootic ataxia, inherited congenital paraplegias in calves and pigs, spina bifida and spinal dysraphism and occipito-alanto-axial malformations in foals and puppies.
conjugate paralysis
loss of ability to perform some parallel ocular movements.
coonhound paralysis
see idiopathic polyradiculoneuritis.
crossed paralysis
paralysis affecting one side of the head and the other side of the body.
curled toe paralysis
a disease of poultry caused by a nutritional deficiency of riboflavin. See also curled toe paralysis.
decubitus paralysis
paralysis due to pressure on a nerve from lying for a long time in one position.
esophageal paralysis
manifested by inability to swallow, and regurgitation.
facial paralysis
weakening or paralysis of the facial nerve. See also facial paralysis.
flaccid paralysis
paralysis characterized by loss of voluntary movement, decreased tone of limb muscles, absence of tendon reflexes and neurogenic atrophy.
immunological paralysis
the absence of immune response to a specific antigen. See also tolerance.
infectious bulbar paralysis
see aujeszky's disease.
ischemic paralysis
local paralysis due to stoppage of circulation.
lambing paralysis
maternal obstetric paralysis in the ewe.
laryngeal paralysis
see laryngeal hemiplegia.
mixed paralysis
combined motor and sensory paralysis.
motor paralysis
paralysis of the voluntary muscles.
nerve paralysis
paralysis caused by damage to the local motor nerve supply. See also peripheral nerve paralysis (below).
obstetric paralysis
see maternal obstetric paralysis.
partial paralysis
see paresis.
peripheral nerve paralysis
the part deprived of its peripheral nerve supply shows flaccid paralysis, absence of spinal reflexes, muscle atrophy and a subnormal temperature.
postcalving paralysis
see maternal obstetric paralysis.
posterior paralysis
paralysis of the hindlimbs, tail and perineum. See also paraplegia.
range paralysis
see marek's disease.
sensory paralysis
loss of sensation resulting from a morbid process.
spastic paralysis
paralysis with rigidity of the muscles and heightened deep muscle reflexes.
tongue paralysis
see hypoglossal nerve paralysis.
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