Appropriate placement of the keyhole at the transverse and sigmoid sinus (T/S) junction is important for performance of safe and accurate lateral suboccipital craniotomy with minimum bone loss. Here, we report a method for predicting the position of the T/S junction and investigate the relationship between the T/S junction and asterion. The subjects were 88 patients treated surgically via a lat...

AIM Keyhole endoscopy is a promising therapeutic option for spontaneous intracerebral hemorrhage (ICH). We sought to compare the clinical outcomes between keyhole endoscopy surgery and craniotomy for basal ganglia ICH. MATERIAL AND METHODS The authors performed a retrospective analysis of the clinical and radiographic data obtained in 28 keyhole endoscopic procedures and 30 craniotomy procedu...

The improvement of surgical techniques as well as the introduction of new surgical instruments promoted the use of keyhole craniotomies in neurosurgery. We evaluated the technical aspects of the supra-orbital keyhole approach considering the indications, limitations, and complications of this approach to treat anterior cranial fossa and parasellar meningiomas. Twenty-four patients (21 females; ...

We propose and test the keyhole hypothesis-that measurements from low dimensional EEG, such as ear-EEG reflect a broadly distributed set of neural processes. We formulate the keyhole hypothesis in information theoretical terms. The experimental investigation is based on legacy data consisting of 10 subjects exposed to a battery of stimuli, including alpha-attenuation, auditory onset, and mismat...

Introduction: An emerging treatment for chronic subdural hematomas is subdural craniostomy using a twist drill port system. While this system has the advantage of being placed in the intensive care setting, and not the operating room, incomplete hematoma evacuation is not uncommon. We detail a simple surgical technique that can be used for persistent or recurrent collections. Materials and Meth...

OBJECTIVE To evaluate the application of eyebrow-lateral keyhole approach in clipping of anterior communicating artery aneurysm (ACAA) through observing the therapeutic effect of eyebrow-lateral keyhole approach on ACAA. METHODS In 37 patients with ACAA, cisterns were exposed via the eyebrow-lateral keyhole approach to reveal ACAA complex followed by clipping of ACAA. Of the 37 patients, exte...