Paresthesias
Description:
One of types of disorder of sensitivity which is characterized by feelings of numbness, feeling of a pricking, crawling of goosebumps.
Symptoms of Paresthesias:
Paresthesia arises as a result of damage or irritation of sites and systems which are responsible in a human body for transfer of sensitive incentives: parietal lobe of a brain, spinal cord, thalamus or peripheral nerves.
Paresthesia can arise at some states. In case of a brain tumor paresthesia can arise owing to defeat by a tumor of sites of bark of a parietal lobe which are responsible for sensitivity. In this case paresthesia is shown against the background of apraxia, agnosia, agraphia, a gemianopiya. Also the anesthesia of proprioceptive nerves takes place.
Paresthesia arises at a stroke. However it is important to consider that in case of a stroke paresthesia sometimes arises on the opposite side. More often at the patient the anesthesia is observed.
At a syndrome to Giyena-Barra paresthesia to become the previous phenomenon before emergence of weakness in muscles which is initially shown in the lower extremities and rises to hands and facial nerves later.
Paresthesia quite often takes place after a head injury. After a konkussiya or a contusion both unilateral, and bilateral paresthesia is often shown. But more frequent phenomenon is an anesthesia.
At patients with shingles paresthesia often arises as one of the first symptoms, at once after a dermatoma. Several days later there is a rash of erythematic vesicles which are accompanied by a severe itch, burning sensation or pain.
At migraine display of paresthesia of hands of the person, area of a mouth sometimes is a harbinger of the approaching attack.
At patients with multiple sclerosis paresthesia arises owing to destruction of a myelin nerve fiber layer in a spinal cord. Paresthesia is one of precursory symptoms of this disease. Later, along with other symptoms paresthesia arises at the patient from time to time, and at a late stage of multiple sclerosis it can take constant shape.
Paresthesia often arises as a result of injuries of any of groups of peripheral nerves. In that case paresthesia that site which is covered by the injured nerves is surprised. It is shown through short time after an injury, sometimes passes into a constant form. The progressing paresthesia of hands and legs can arise because of a peripheral neuropathy.
At emergence at the patient of attacks which are shown owing to disturbances in a frontal lobe of a brain paresthesia of lips, fingers of extremities very often takes place.
At patients who received injury of a spinal cord paresthesia is shown below the place of damage. It can be both unilateral, and bilateral, it is accompanied by various manifestations of an anesthesia. Paresthesia is observed at tumors of a spinal cord. In that case this phenomenon is accompanied by paresis, an anesthesia and pain. Also paresthesia is a late sign of tabes.
At patients with passing ischemic disturbance of blood circulation in a brain paresthesia is shown suddenly, affecting one part of a body, for example, a hand. The attack proceeds about ten minutes, it is accompanied by paresis or paralysis.
Also paresthesia is one of symptoms of a number of cardiovascular diseases. At occlusion of arteries of an acute form paresthesia arises suddenly, at the same time the patient feels cold in one or in both legs, paresis is shown. Paresthesia takes place at patients with atherosclerosis, a Thrombangiitis obliterans, Raynaud's disease, at a syndrome of the thoracic expiration. At the last disease paresthesia is shown suddenly, at assignment aside or a raising of a sore hand.
Paresthesia is shown and at some skeletal and muscular diseases. So, at patients with arthritis paresthesia of shoulders, necks, hands often takes place. In more exceptional cases when there is a defeat of lumbar department of a backbone, there is paresthesia of legs and feet. The patients having hernia of a vertebral or lumbar disk have an acute or gradual paresthesia along conduction paths of nerve terminations which were damaged.
Displays of paresthesia happen at metabolic disturbances in an organism. At a hypocalcemia there is asymmetric paresthesia of fingers of extremities, similar symptoms together with weakness of hands and legs are observed at a lack of a vitamin B organism.
Some mental diseases also provoke paresthesia. So, this phenomenon is characteristic of a hyperventilation syndrome.
Paresthesia can also testify to poisoning with heavy metals. At display of paresthesia, a pricking and cold in the field of a sting of an animal it is necessary to check suspicions for a prodromal stage of rage. Paresthesia is sometimes shown at pregnant women as one of displays of toxicosis.
Reasons of Paresthesias:
The passing paresthesia is usually caused or direct mechanical irritation of superficially lying nerve, for example, at blow or pressure, or at the temporary disturbance of blood supply of an extremity leading to change of carrying out nervous impulses, for example, at long stay in an inconvenient pose, often during sleep.
Treatment of Paresthesias:
For treatment of paresthesia in certain cases effective are antiepileptic means, for example, Phenytoinum or carbamazepine in the same doses, as for therapy of bad short-term attacks of pain.
Analgetic drugs usually do not help. In certain cases it is possible to achieve improvement by means of transdermal electrostimulation of nerves.
