Mirror neuron dysfunction in autism spectrum disorders

Autism spectrum disorders (ASDs) are developmental conditions characterized by deficits in social interaction, verbal and nonverbal communication and obsessive/stereotyped patterns of behaviour. Although there is no reliable neurophysiological marker associated with ASDs, dysfunction of the parieto-frontal mirror neuron system has been suggested as a disturbance linked to the disorder. Mirror neurons (MNs) are visuomotor neurons which discharge both when performing and observing a goal directed action. Research suggests MNs may have a role in imitation, empathy, theory of mind and language. Although the research base is small, evidence from functional MRI, transcranial magnetic stimulation, and an electroencephalographic component called the mu rhythm suggests MNs are dysfunctional in subjects with ASD. These deficits are more pronounced when ASD subjects complete tasks with social relevance, or that are emotional in nature. Promising research has identified that interventions targeting MN related functions such as imitation can improve social functioning in ASDs. Boosting the function of MNs may improve the prognosis of ASDs, and contribute to diagnostic clarity.

Sleepwalking into the mirror : panic and the thin skin of a writer

This text interwoven with artworks by Elizabeth McQueen explores the act of writing and this writer’s search for a narrative form which, after Kafka, fuses dream and reality. Escaping from the back door of my PhD research, which has entered such liminal realities as sleepwalking and autism as a way of challenging familiar boundaries of western normative thought, this text explores a slightly different boundary transgression: a terrifying fusion of reality and writing when late one dark (but not stormy) night a character from my novel appeared at my back window.

Early jump-out corner detectors

We present two new corner detectors; one works by using dissimilarity along the contour direction to detect curves in the image contour and the other estimates image curvature along the contour direction. These operators are fast, robust to noise, and require no subjective thresholding.