Supplementary Motor Area Syndrome in Neurosurgical Practice

Area of Science:

• Neurosurgery
• Neuroscience
• Clinical Neurology

Background:

• Supplementary motor area (SMA) syndrome is a recognized clinical entity following medial frontal cortex surgery, particularly for intra-axial lesions and epilepsy.
• It manifests as transient contralateral hemiparesis and, in dominant hemisphere cases, speech initiation deficits, posing a reversible postoperative challenge.
• Recent advancements in neuroimaging and intraoperative neural tract mapping have significantly improved the understanding of neuroplasticity and recovery pathways.

Purpose of the Study:

• To review and synthesize recent high-impact studies on SMA syndrome in the context of brain tumor and epilepsy surgery.
• To outline contemporary insights into SMA function, surgical planning strategies, and recovery mechanisms.
• To provide neurosurgeons and neuroscientists with an evidence-based understanding of SMA syndrome and its implications for functional outcomes.

Main Methods:

• Literature review of recent, high-impact studies focusing on SMA syndrome.
• Synthesis of findings related to neuroimaging, intraoperative neural tract mapping, and neuroplasticity.
• Contextualization of new findings within the framework of foundational work on SMA syndrome and exploration of the frontal aslant tract's role.

Main Results:

• Enhanced understanding of SMA function and its role in speech and motor control.
• Identification of neuroimaging and tract mapping techniques aiding surgical planning and predicting recovery.
• Emerging insights into the contribution of the frontal aslant tract (FAT) to SMA connectivity and syndrome manifestation.

Conclusions:

• SMA syndrome, while a significant postoperative challenge, is characterized by neuroplasticity and potential for recovery.
• Advanced techniques offer improved surgical planning and a better prognosis for patients.
• Further research into SMA connectivity, particularly involving the FAT, is crucial for optimizing surgical outcomes in neuro-oncological and epilepsy surgery.