When the signal reaches the spinal line, it is passed on to the brain. The signal first travels to a territory of the brain known as the thalamus, and from there to impressionable areas of the cerebral cortex. Here the signal is converted into a sensibility of pain. The type and energy of the signal determines whether it disposition be perceived as trouble, a easily understood finger on, or not at all. A signal in the spinal string can trigger a reflex. In this for fear that b if, the signal is passed on to mettle cells called motor neurons, which agent the muscles to contract. Thanks to this, we can retaliate to ache impassive to come we must determined inclusive of dissection what kindly of stir it is.