14 CFR § 67.109 - Neurologic.
Neurologic standards for a first-class airman medical certificate are:
(a) No established medical history or clinical diagnosis of any of the following:
(2) A disturbance of consciousness without satisfactory medical explanation of the cause; or
(3) A transient loss of control of nervous system function(s) without satisfactory medical explanation of the cause.
(b) No other seizure disorder, disturbance of consciousness, or neurologic condition that the Federal Air Surgeon, based on the case history and appropriate, qualified medical judgment relating to the condition involved, finds -
(1) Makes the person unable to safely perform the duties or exercise the privileges of the airman certificate applied for or held; or