Related Experiment Video
Updated: Feb 15, 2026

Study Design for Navigated Repetitive Transcranial Magnetic Stimulation for Speech Cortical Mapping
Published on: March 24, 2023
Insights
Harvey Cushing
Area of Science:
- Neurosurgery
- Neurology
- Medical History
Background:
- Presents 8 historical sketches by Harvey Cushing detailing cortical stimulation techniques.
- Illustrates Cushing's work on focal motor seizures and dyskinetic movements.
- Highlights Cushing's contributions to epilepsy treatment and functional disorder management.
Discussion:
- The sketches offer rare insights into Cushing's early cortical stimulation methods.
- Demonstrates the application of electrical stimulation in precise surgical resections.
- Underscores the historical significance of these visual records in neurosurgery.
Key Insights:
- Cushing's sketches visually document the relationship between cortical lesions and motor function.
- Electrical stimulation of the precentral gyrus was used to treat specific neurological conditions.
- These historical illustrations aid in understanding the evolution of epilepsy surgery.
Outlook:
- These sketches provide valuable historical context for modern neurosurgical practices.
- Further research into Cushing's and Penfield's collaborative work is warranted.
- The findings contribute to a richer understanding of the history of neurosurgery and epilepsy treatment.
Abstract:
Harvey Cushing and Wilder Penfield enjoyed a unique professional and personal relationship. Shortly before his retirement from Harvard University in 1933, Cushing sent Penfield 8 sketches that he drew in 1902 and 1903 while he was at Johns Hopkins Hospital. The first series of 3 sketches illustrate the relationship between a cortical hemorrhagic lesion and the motor strip in a patient with focal motor seizures. The second series also comprises 3 sketches. These depict the operative findings in a patient in whom Cushing had electrically stimulated the precentral gyrus, before resecting the cortex subserving motility of the upper extremity to control painful dyskinetic movements. The third series consists of 2 sketches that illustrate the results of stimulation of the motor strip as an aid in the safe resection of an epileptogenic focus in a patient with Jacksonian seizures. These sketches are the subjects of this paper. They add to the relatively sparse record of Cushing's activities in cortical stimulation and in the treatment of functional disorders.
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