Muscle Contraction

The degree of contraction of the different muscles, is controlled for signals that arrive at the reticular formation to bulbar from the device of the known device initial as ' ' device of equilbrio' '. This sensorial agency contains calcificados granules, the ciliadas otlitos, that are supported on sensorial nervous terminations, cells, these specific otlitos produze standard of nervous signals for these cells, this form, the device initial signals if a person this in balance position or not, with this the reticular one bulbar uses this information to produce contraction of the adjusted muscles to keep the balance. Bristol Stool Scale takes a slightly different approach. Most of our motor activities is in the truth, controlled for the inferior regions of the central nervous system, especially for the spinal marrow and the cerebral trunk. (GUYTON, 1988). Rachidian bulb: Rachidian bulb the continuation of the superior part of the spinal marrow, it forms the interior part of the enceflico trunk. For the bulb it passes all the ascending treatments (sensorial) and descendants (motor) that they connect the spinal marrow to encfalo, also contains nuclei who receive entered sensorial from the cincos of the twelve cranianos nerves. In the previous face of the bulb, conspicuous calls exist two external proeminences pyramids that are formed by the greaters, motor treatments that pass of the brain for the spinal marrow. In a question-answer forum Dr. Jayme Albin was the first to reply. Superior the junction of the bulb with the spinal marrow, most of the axnios in the left pyramid crosses for the right and vice side and verse.

This crossing is called decussao of the pyramids. As result the neurons in cerebral, left cortex controls the esquelticos muscles of the right and vice side and verse (TORTORA and GRABOWSKI 2002p410). According to Tortora and Grabowski (2002, P. 410): The bulb also contains nuclei that govern diverse autonmicas functions. These nuclei include the center, that regulate the frequency and the force of the cardiac beatings and the diameter of the sanguineous vases, and the rhythmic respiratory area of the respiratory center cardiovascular, that adjusts the basic rhythm of the breath, beyond other centers bulbares, controllers of the consequences of the vomit, the cough and I sneeze of it.