A lesion of the uncus may result in which of the following?

A lesion of the uncus is associated with olfactory processing and can lead to olfactory hallucinations. The uncus is part of the temporal lobe and is closely linked to the olfactory system, making it particularly involved in the perception of smells. When the uncus is damaged or lesioned, it can cause the brain to misinterpret signals related to odor, resulting in the experience of smells that are not actually present, known as olfactory hallucinations.

In this context, visual hallucinations, hypersensitivity to odors, and loss of the sense of smell are not the primary consequences of an uncus lesion. Visual hallucinations are typically associated with areas of the brain involved in vision, like the occipital lobe. Hypersensitivity to odors may suggest a heightened response to smells rather than the misperception seen in olfactory hallucinations. Loss of the sense of smell, known as anosmia, can occur due to other lesions affecting olfactory pathways but is not specifically tied to lesions in the uncus itself. Hence, olfactory hallucinations are the most direct result of a lesion in this area.