Analgesia
The term Analgesia is widely referred to the loss of sensation of pain that occurs due to an interruption in the nervous system pathway which is placed between sense organ and brain. Different forms of sensation including that of touch, temperature, and pain stimulating an area of skin travel to the spinal cord facilitated by different nerve fibres in the same nerve bundle. This indicate to the fact that any injury or disease affecting the nerve would abolish all forms of sensation in that particular area supplied by it.
When sensory nerves reach the spinal cord, their fibres separate continuously and follow different courses to the brain. Thus, it is not quite impossible that certain forms of sensation are lost, while others are forms are preserved, in the term of the diseases that affect only certain areas of the organism’s spinal cord. Because pain and temperature sensations usually travel in the same path, both might suffer a loss.