Difficult differentiation of a somatic symptom disorder from anterior cutaneous nerve entrapment syndrome (ACNES): a case report.

BACKGROUND: Somatization is regarded as psychological or emotional distress in the form of physical symptoms that are otherwise medically unexplained. CASE PRESENTATION: We report a case of a patient with a somatic symptom disorder (SSD) and depression who was later diagnosed with anterior cutaneous nerve entrapment syndrome (ACNES) when Carnett's test was positive and block anesthesia using trigger point injections dramatically improved the symptom of abdominal pain. CONCLUSION: We concluded that the differentiation of SSDs, such as psychogenic pain, from ACNES is very difficult. Psychiatrists should be aware of this syndrome.

[Behavioral signs of neuropathic pain in cats due to compression of the infraorbital nerve]. / Povedencheskie priznaki neiropaticheskoi boli u koshek vsledstvie kompressii infraorbital'nogo nerva.

The changes in behavioral reactions were studied in cats after incomplete compression of the infraorbital nerve by means of two ligatures as a model of trigeminal neuropathy. It was found that there appeared a behaviour protective the damaged side of the face, sudden standstills of the animals which threw their head back and raised their anterior paws to the face, as well as inhibition of motor activity. Decreases in the nociceptive threshold and the threshold of emotionally affective responses to lip electrostimulation as the sensory threshold increased. These behavioral changes are regarded as signs of spontaneous pain and hyperalgesia in animals with nerve compression, and the used model is considered to be adequate for studying the mechanisms of neuropathic pain.