Conversion Disorder/physiopathology; Hypesthesia/physiopathology; Magnetic Resonance Imaging; Prosencephalon/physiopathology; Somatosensory Cortex/physiopathology; Adult; Amobarbital; Brain Mapping; Conversion Disorder/complications; Conversion Disorder/pathology; Evoked Potentials, Somatosensory; Female; Gyrus Cinguli/pathology; Gyrus Cinguli/physiopathology; Humans; Hypesthesia/complications; Hypesthesia/pathology; Male; Middle Aged; Migraine Disorders/psychology; Models, Neurological; Models, Psychological; Pain Measurement; Pain, Intractable/complications; Pain, Intractable/psychology; Perception/physiology; Prosencephalon/pathology; Somatosensory Cortex/pathology; Thalamus/pathology; Thalamus/physiopathology; Touch; Wounds and Injuries/psychology