<prompt> Organic Mental Disease is indicated byIncoherenceDelusionFlight of ideaPreservation of speech  <response>: B i.e. Delusions Presenting Features Visual or other non-auditory hallucinationsQ Complex delusionsQ Soft neurological signsQ, confusion, disorientationQ memory impairment Neurological signs symptoms as seizures, sensory or motor disturbance, impairment of conciousnessQ Misidentification syndromes as capgras etc. First rank symptoms as made feelings, voices commenting etc. HO head injury, drug or alcohol use Concurrent medical or neurological illness Ist episode, sudden onset, older age of onset. Organic Mental Disease - Organic mental disorders are of 3 types Dementia Delirium Substance medical related condition - In subcoical dementia - complex delusions are found.Q 