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| Titel: |
Functional MT + lesion impairs contralateral motion processing |
| Auteur: |
Moo, Lauren R. Emerton, Britt C. Slotnick, Scott D. |
| Verschenen in: |
Cognitive neuropsychology |
| Paginering: | Jaargang 25 (2008) nr. 5 pagina's 677-689 |
| Jaar: |
2008-07 |
| Inhoud: |
Human motion processing region MT + is retinotopically organized with perception of and attention to motion in the right visual field preferentially associated with left MT + activity and vice versa. However, the degree to which MT + is crucial for motion processing is uncertain. We report an epilepsy patient with visual symptoms early in his seizure evolution and a left temporal-occipital seizure onset electrographically in whom we hypothesized a functional left MT + lesion. The patient was impaired in his right but not left visual field on a hemifield motion attention task and demonstrated worse performance on a hemifield picture identification task when pictures implying motion were presented in the right as opposed to the left visual field. Functional MRI (fMRI) during a full-field motion detection task activated right MT + but failed to activate left MT + despite activating both left and right MT + in each of 10 controls. Furthermore, fMRI during a hemifield motion attention task also showed a lack of left MT + attention effects in the patient. Together these results suggest that MT + is necessary for normal motion processing. |
| Uitgever: |
Psychology Press |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 5 van 8 gevonden artikelen
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