Changes

'''Clinical Relevance'''

'''Clinical Relevance'''

*In trauma, the small unmyelinated fibres are the last fibres to fail as they are close to the [[Spinal Cord - Anatomy & Physiology|spinal cord]].

During trauma the small unmyelinated fibres are the last fibres to fail as they are close to the [[Spinal Cord - Anatomy & Physiology|spinal cord]]. If deep pain sensation is lost in a case of trauma, then the prognosis is poor. ''Hyperalgesia'' is an increased pain sensation. This occurs when tissue is damaged because chemicals are released which increase the sensitivity of nociceptors, so that even light pressure can cause pain. Hyperalgesia may have evolved to aid the healing of injuries.

**If deep pain sensation is lost in a case of trauma, then the prognosis is poor.

*''Hyperalgesia'' is an increased pain sensation. Occurs when tissue is damaged because chemicals are released which increase the sensitivity of nociceptors, so that even light pressure can cause pain.

**May have evolved to aid the healing of injuries.

===Visceral Pain===

===Visceral Pain===