noun Medicine/Medical.
a record of the electrical activity of the cerebral cortex.

1935–40; electro- + cortico- + -gram1

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World English Dictionary
electrocorticogram (ɪˌlɛktrəʊˈkɔːtɪkəʊˌɡræm)
electroencephalogram Compare electroencephalograph a record of brain waves obtained by placing electrodes directly on the surface of the exposed cerebral cortex

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

electrocorticogram e·lec·tro·cor·ti·co·gram (ĭ-lěk'trō-kôr'tĭ-kə-grām')
The record obtained by electrocorticography.

The American Heritage® Stedman's Medical Dictionary
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