Brief cognitive behavioural therapy for post-stroke 'delusional infestation' in a 71-year-old man: a single case experimental design.

Background: Delusional infestation is a condition at the interface of tactile and visual hallucinations and delusions. Individuals with this condition hold the fixed and false belief that their body or their environment is infested with parasites, insects or other organisms.

Aims: There are no guidelines or publications detailing the psychological assessment, formulation, intervention and evaluation of this presentation.

Enhanced emotional response to both negative and positive images in post-traumatic stress disorder: Evidence from pupillometry.

Post-traumatic stress disorder (PTSD) is characterised by alterations in the function of the autonomic nervous system. However, it is unclear if this dysfunction is threat-related or related to arousing stimuli in general. Pupillometry offers a simple non-invasive measure of ANS activity that can separate parasympathetic and sympathetic arousal.