![Open Access](https://i-scholar.in/lib/pkp/templates/images/icons/fulltextgreen.png)
![Restricted Access](https://i-scholar.in/lib/pkp/templates/images/icons/fulltextred.png)
Frontal Cortex Electrical Changes during Infratentorial Neurosurgery: A Case Series
The posterior fossa is usually discussed as a separate entity from supratentorial structures, with no distinct correlation described, between infratentorial manipulation and changes in supratentorial cortical electrophysiology. We report a series of four cases of infratentorial tumour surgeries showing abrupt slowing of frontal cortical electrical activity intraoperatively which were ruled out from being artefactual. In three of the cases, the changes were transient with no lasting effects on postoperative outcome. In one case, patient had prolonged recovery after anaesthetic withdrawal and poorer neurological outcome. A mechanism involving reticular formation and its effect of cortical electrical activity has been proposed based on previous neurophysiology literature.
Keywords
Frontal cortex, Infratentorial, Neurosurgery
User
Font Size
Information
- Chakrabarti D, Ramesh VJ, Manohar N. Brainstem Contusion: A Fallacy of GCS-BIS Synchrony. Journal of Neurosurgical Anesthesiology. 2016; 28:429-30. https://doi. org/10.1097/ANA.0000000000000215 PMid:26274623
- Jones BE. Arousal Systems. Front. Biosci., 2003; 8:s438-s451. https://doi.org/10.2741/1074 PMid:12700104
- Jones BE. Activity, modulation and role of basal forebrain cholinergic neurons innervating the cerebral cortex. Prog Brain Res. 2004; 145:157-69. https://doi.org/10.1016/ S0079-61230345011-5.
- McCarthy MM, Brown EN, Kopell N. Potential network mechanisms mediating electroencephalographic beta rhythm changes during propofol-induced paradoxical excitation. J Neurosci. 2008; 28:13488-504. https://doi. org/10.1523/JNEUROSCI.3536-08.2008 PMid:19074022 PMCid:PMC2717965
![](https://i-scholar.in/public/site/images/abstractview.png)
Abstract Views: 76
![](https://i-scholar.in/public/site/images/pdfview.png)
PDF Views: 56