The brain's right hemisphere is responsible for spatial cognition. A number of cognitive impairments may occur with right-sided brain injury, often as the result of stroke or traumatic brain injury involving the right parietal lobe. Patients may also appear to lack emotion and not care about a person or the consequences of things. Anosognosia is a very strange disorder. Patients with clear psychological and/or physical problems will tell one that there is nothing wrong with them. This demonstrates a lack of awareness or denial of deficits and the consequences of the deficits. Constructional apraxia involves the inability to correctly spatially arrange the parts of objects when copying a model such as a drawing. This is due to a problem with the ability to think spatially and to interpret the meaning of space in two and three dimensions. Neglect is a problem with attention - it is not a visual problem.