Sensitive way

Sensory pathways, in neurology, are bundles of peripheral neurons that pass through the marrow to the thalamus in the brain, which is the processing center of conscious sensitivity, and the amygdala of the hippocampus, which analyzes olfaction . There are three types of sensory pathways: the visceral, like taste and smell, the special ones like sight, hearing and balance, and the general somatic, that is, the tactile sensation, which is rather a mixture of different sensitivities : fine touch, firm pressure, proprioception, heat and cold. First Sensory Neuron

The first sensory neurons are unmyelinated unipolar cells whose body is found in the spinal ganglia. Its peripheral endings bring you stimuli born of the nerve endings of the skin, tendons, muscles and joints; Its central dendrites form the posterior roots of the spinal nerves, which reach the spinal cord in the posterior collateral sulcus, outside the Lissauer area. Within the spinal cord terminations are divided into many collateral branches, so that the original impulse synapses into many secondary neurons. These branches ascend or descend and go to the white cords, either gracilis or cuneatus, in order of caudal to cephalic; that is to say, the lower neurons of the body are first established in them, and as the cord marches up, plates are superimposed laterally on them. In the first sensitive neuron there are dendrites adapted to receive the heat that arrives directly at the skin and is transported by means of nerve impulses until the hypothalamus and captured by the brain Second Sensory Neuron

They come into contact with the second neurons of the pathway, which are found in the gelatinous substance of Rolando, in the posterior gray horn.

Then they cross contralaterally towards the anterior part of the marrow and reach the lateral cord forming the anterior and posterior spinothalamic beams. Third Sensory Neuron

Ascend to contact the third neurons, which are thalamic.

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