Mentation and behavioural changes

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This chapter focuses on the classification of mental status in cats, clinical approach, differential diagnoses and diagnostic approach.

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5.24.1 Head pressing is a sign of forebrain dysfunction. It can arise from structural brain diseases as well as metabolic or toxic diseases. (Courtesy of Cristian Falzone)
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5.24.2 Circling is a sign of an asymmetrical or focal lesion in the forebrain in the absence of head tilt and/or loss of balance. Circling is usually toward the side of the forebrain lesion, in this case of left-sided meningioma. (Courtesy of Cristian Falzone)
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5.24.4 Dorsal T1-weighted contrast-enhanced magnetic resonance images of a cat with a large rostrotentorial meningioma (arrowed) before and after surgical resection via craniectomy.
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5.24.5 Transverse T2-weighted and T1-weighted contrast-enhanced magnetic resonance images of a cat with intracranial empyema secondary to a bite wound, that was presented with right forebrain signs. There is fluid signal accumulation (arrowed) between the calvarium and brain on the right side. Note the marked mass effect on the brain, contrast enhancement of the meninges (arrowed) and hyperintensity within the ventral part of the right temporalis muscles (arrowhead).
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