What is a reflective arch?
Reflex is an automatic reaction to some kind of stimulus. In addition to automatic automatic, these actions cannot be prevented. For example, if dust or dirt blows into someone's eye, this person cannot prevent his eye blinking, or if a piece of food moves to the trachea, he cannot stop the cough with the results. Reflexes do not follow the same paths as other nerve impulses. Instead, the nerve path for reflexes is called a reflective arch. The brain receives a message and then sends another message in response to this initial stimulation. This happens very quickly, but it is not automatic, such as the response observed in reflexes. The difference in two types of reflexes is where the reflective arch is located. In spinal reflexes, it occurs in the spinal cord and for brain reflexes, in the brain. No matter where the reflective arch is located, no conscious control is involved. An example of the backbone reflex is the reaction of the knee trash and brain reflex, including flickering, cough and iris contraction inside the eye.
The key difference between reflective action and any other action is the involvement of the brain and the lack of conscious control. After the reflective arch, the nerve pulses move along sensory neurons from the site of stimulation to the spinal cord or brain and then back to the reaction area along motor neurons. In some reflective arches, sensory neurons are associated with motor neurons of the connector, but in any case there is no brain control.
The nerve path for the reaction of the knee market is well known and documented. It provides a clear example of the action of monitoring a simple reflective arch. During the knee test test, the onno is exceeded through the second and maintained completely relaxed. Clicking on the tendon just below the pin will result in the leg swings up.
The path for this reflective arch begins at the stretching receptor inside the tendon. Setting this receptor stimulates it, which is inhibitsHe bursts that he sent a nerve impulse along the sensory neuron. In the spinal cord, the nerve pulse passes from the sensory neuron to the motor neuron and travels back to the thigh muscle. When the pulse arrives on the thigh muscles, it causes it to download and tears the bottom of the foot up. The person is aware that it is happening, so sensory impulses travel from spinal cord to brain, but there is nothing to do to make it happen.