Digestion is a necessary part of the absorption process. Food first enters the stomach after you chew and swallow it. The stomach stores the food and liquid you swallow and mixes it with digestive juices that the stomach makes.
Processing primarily occurs in the primary somatosensory area in the parietal lobe of the cerebral cortex: information is sent from the receptors via sensory nerves, through tracts in the spinal cord and finally into the brain.he sensory information (touch, pain, temperature etc.,) is then conveyed to the central nervous system by afferent neurons. There are a number of different types of afferent neurons that vary in their size, structure and properties.
1 The cell bodies of the three neurons in a typical somatosensory pathway are located in the dorsal root ganglion, the spinal cord, and the thalamus, respectively.  A major target of somatosensory pathways is the postcentral gyrus in the parietal lobe of the cerebral cortex.