Single transcranial magnetic pulsed stimuli were applied over the cortical area of the putative right frontal eye field (FEF) in 11 healthy subjects. An especially designed figure of eight shaped twin coil was used, to focus the stimulus, the strength of which was adjusted to the individual motor th
Observations on stimulation of the human frontal eye field
β Scribed by Lloyd Jean Lemmen; James Sutton Davis; Leonard Lawrence Radnor
- Publisher
- John Wiley and Sons
- Year
- 1959
- Tongue
- English
- Weight
- 279 KB
- Volume
- 112
- Category
- Article
- ISSN
- 0021-9967
No coin nor oath required. For personal study only.
β¦ Synopsis
Voluntary deviation of the eyes depends upon intact frontal eye fiellds and connections from these cortical centers to the eye muscle nuclei. Reciprocal innervation of eye muscles by the human frontal eye fields has been indicated in a previous study (Lemmen, Fisher and Davis, '58). All observers have obtained conjugate deviation of the eyes toward the side opposite stimulation from this cortical area (Crosby, '53). Experimental study in monkeys has revealed a variety of other types of eye movements from stimulation of the frontal eye fields. Information remains incomplete about these latter eye movements in the human frontal eye fields. Cortical stimulation for localization purposes during a human operation has revealed various eye movements. The observations suggested a cortical pattern in the human frontal cortex for eye movements in a variety of directions.
CASE REPORT
This 42-year-old right-handed Negro man was admitted with n two-month history of convulsions, headaches of increasing severity, blurring of vision and progressive right hemiparesis.
Nine months prior to admission a metastatic carcinoma had
The authors are indebted t o the Staff of the Medical Illustration Service for the drawings. We wish t o thank Drs. E. C. Crosby and T. Humphrey for their helpful advice.
π SIMILAR VOLUMES
Electrical stimulation of the frontal eye fields of the rhesus monkey evokes saccadic eye movements. Both the amplitude of electrically elicited saccades and the threshold current for eliciting them are primarily determined by the location of the stimulating electrode within the frontal eye fields;
Effects of electrical stimulation of the frontal eye field (FEF) upon activites of the lateral geniculate body (LG) were studied in encephale isole cats. In some experiments the effects were examined by recording field responses of the dorsal nucleus of LG (LGd) and the visual cortex (VC) to electri
With 11 Figures (10.I.1950) We dedicate the present paper to the memory of our 9rear friend F. P. F i s c h e r. We will never forget all he has done for us.