Transformation of a sound stimulus to a visual experience, auditory-visual synesthesia, is a curious phenomenon reported in patients with acquired visual loss involving the anterior visual pathways. We describe a patient in whom a striking auditory-visual synesthesia developed ipsilateral to a large mass involving the medial temporal lobe and the adjacent midbrain. This patient's neuro-ophthalmologic and neurophysiologic examinations did not disclose any evidence of visual dysfunction. The synesthesia disappeared after removal of the mass.
REPORT OF A CASE
A 25-year-old man complained of dull left-sided headaches, weakness and numbness of the left side, and intermittent double vision, which had increased in intensity during a four- to five-week period. During the past two years, he had experienced several episodes during which he saw moving spots of light "like comets" in front of both eyes. General physical examination revealed no abnormality. The neurological examination showed a diminished corneal reflex on the left
Vike J, Jabbari B, Maitland CG. Auditory-Visual Synesthesia: Report of a Case With Intact Visual Pathways. Arch Neurol. 1984;41(6):680–681. doi:10.1001/archneur.1984.04210080092023
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