Raymond's sign is a medical term that was coined by the French neurologist Raymond in 1872. This sign is used to determine the presence or absence of epilepsy in a patient.
Raymond described this symptom as follows: “In epilepsy, at the time of a seizure, there is a sudden and rapid contraction of the facial muscles, which leads to a change in facial expression. This change can be either permanent or temporary. A persistent change in facial expression may appear as a frozen grimace or a persistent expression of surprise, fear, or fear.”
To determine the presence or absence of this sign in a patient, it is necessary to conduct a special test. The doctor asks the patient to look at him, then suddenly close his eyes and open them again. If the patient’s face does not change expression, this may indicate the presence of epilepsy.
This sign was developed to diagnose epilepsy, but it can also be used to diagnose other diseases such as schizophrenia, depression and other mental disorders.