Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7283422 | Brain and Language | 2018 | 6 Pages |
Abstract
We evaluated plasticity in speech supplemental motor area (SMA) tissue in two patients using functional magnetic resonance imaging (fMRI), following resection of tumors in or associated with the dominant hemisphere speech SMA. Patient A underwent resection of a anaplastic astrocytoma NOS associated with the left speech SMA, experienced SMA syndrome related mutism postoperatively, but experienced full recovery 14â¯months later. FMRI performed 32â¯months after surgery demonstrated a migration of speech SMA to homologous contralateral hemispheric regional tissue. Patient B underwent resection of a oligodendroglioma NOS in the left speech SMA, and postoperatively experienced speech hesitancy, latency and poor fluency, which gradually resolved over 18â¯months. FMRI performed at 64â¯months after surgery showed a reorganization of speech SMA to the contralateral hemisphere. These data support the hypothesis of dynamic, time based plasticity in speech SMA tissue, and may represent a noninvasive neural marker for SMA syndrome recovery.
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Authors
Srinivas Chivukula, Brian K. Pikul, Keith L. Black, Nader Pouratian, Susan Y. Bookheimer,