Before my work on emotion, I worked in the domain of visuo-spatial cognition and object recognition. The most prominent of the findings was the disorder often described as 'orientation agnosia': in which neurological patients have a sound knowledge of the relative internal spatial properties of an object, but lack knowledge of object orientatiion. It is closely associated with the clinical sign of rotated drawing (see Solms et al). This section has only some of the papers on visuo-spatial topics -mainly the more recent ones, which are on pdf.

A selective pictorial depth perception deficit

Turnbull, O.H., Driver, D. & McCarthy, R.A. (2004). 2D but not 3D: Pictorial-depth deficits in a case of visual agnosia. Cortex, 40: 723-738.

Orientation agnosia

Turnbull, O.H., Beschin, N. & Della Sala, S. (1997). Agnosia for object orientation: Implications for theories of object recognition. Neuropsychologia, 35: 153-163.

An unusual example of category-specific semantic impairment

Turnbull, O.H. & Laws, K.R. (2000). Loss of stored knowledge of object structure: Implications for ‘category-specific’ deficits. Cognitive Neuropsychology, 17: 365-389.

Reaction time data for orientation agnosia

Turnbull, O.H., Della Sala, S. & Beschin, N (2002). Agnosia for object orientation: Naming and mental rotation evidence. Neurocase, 8: 296-305.

A case series of rotated drawing

Solms, M., Turnbull, O.H., Kaplan-Solms, K. & Miller, P. (1998). Rotated drawing: The range of performance, and anatomical correlates, in a series of 16 patients. Brain & Cognition, 38: 358-368.