Spasm is a pathological muscle contraction associated with increases in their tone. Spasm is a reflex reaction based on a pyramid system. Active mobility at a spasm sharply limited, passive, it is also difficult, and passive movements of the limbs, characterized by high resistance with springy character. With a slight movement of muscle hypertension may not be registered; in these cases, it becomes more apparent when sudden movements.
Clinical manifestations acute skeletal muscles are increased muscle tone, defined by touch muscle tension and visually change their configuration. A typical picture at a spasm has electromyogram, which reveal the increase of the amplitude of oscillations of the potential and other signs. Spasm of the muscles of the limbs are observed at children's paralysis, lesions of the brain and spinal cord.
In the clinic of great importance, in addition to skeletal muscle spasm, have a spasm of the blood vessels, respiratory tract, digestive tract. These spasms are also often reflex and is caused by various stimuli indirectly through the Central nervous system, although the source of irritation can be localized in spazmiruet the body. So, bronchospasm may be a consequence of hitting of foreign body into respiratory tract; spasm may occur as a result of local cooling or under the influence of an emotional impact.
At a spasm of skeletal muscles to relax her designate different relaxants (see muscle Relaxants)and in case spasm of smooth muscles - vasodilator, bronhorasshiryayuschimi drugs, antispasmodic (see) and other