cortical stimulation mapping
Intraoperative technique using electrical stimulation to identify and preserve critical brain areas during tumor resection.
Full Definition
Cortical stimulation mapping is a specialized intraoperative neurophysiological technique used during neurosurgical procedures to identify and preserve eloquent brain areas responsible for critical functions such as speech, motor control, and sensory processing. The procedure involves applying controlled electrical stimulation directly to the cortical surface while the patient performs specific tasks, allowing real-time identification of functional areas that must be preserved during tumor resection. This technique is particularly valuable when tumors are located in or near eloquent cortex, enabling maximum safe resection while minimizing the risk of permanent neurological deficits. The mapping can be performed in awake patients or under general anesthesia depending on the functions being tested.
Usage
Usage note: Often abbreviated as CSM in surgical notes; requires specialized neurophysiology team.
In Context
- "Cortical stimulation mapping identified critical speech areas 5mm from the tumor margin." — intraoperative monitoring report
- "The resection was guided by cortical stimulation mapping to preserve motor function." — operative summary