NeuroTychoWiki - User contributions [en]

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2012-10-21T08:41:13Z

Nijcadmin:

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2012-10-18T21:05:30Z

Nijcadmin: /* Menu */

'''Wiki for Neurotycho.org'''

Welcome to Wiki.Neurotycho!

Project Tycho is named after Tycho Brahe. The project aims to share reliable massive neural and behavioral data for understanding brain mechanism. The dataset was recorded and distributed by Laboratory for Adaptive Intelligence, BSI, RIKEN. It is not only for neuroscientists but for everyone who is interested in learning neural mechanism.

[[File:Ss.png]]

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2012-08-14T06:50:17Z

Nijcadmin:

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2012-08-13T08:17:57Z

Nijcadmin:

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2012-08-08T10:33:14Z

Nijcadmin:

Peking Stay wird mit kostenlosem Wireless Abfrage Zahlungsfunktion bieten

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2012-07-16T12:10:02Z

Nijcadmin: Blanked the page

Surgical Procedure

2012-06-21T09:20:49Z

Nijcadmin:

{| class="wikitable"
|- Illustration || Procedures |
|-
|[[File:Fig01.jpg|400px]] || Anesthetize a monkey and fix the head on stereotaxic. Attach all of electrode for monitoring vital signal during surgery. Disinfect all of surgical area and cover the area with sterilized drapes.
|-
|[[File:Fig02.jpg|400px]] || Incise a skin with a cautery knife. The galea aponeurotica is cut at the center and gently peeled off from skull with the knife.
|-
|[[File:Fig03.jpg|400px]] || The galea aponeurotica and temporal muscle are removed from skull with scraper until all of surgical area is exposed. Tissues on skull surface have to be wiped out and all of bleeding has to be completely stopped.
|-
|[[File:Fig04.jpg|400px]] || Edge of the skin and the muscles are wrapped with moistened gauze. The gauze has to be kept moistened during the surgery.Traction sutures are put at skin edge under the gauze and the suture is pulled out to ensure a sufficient working space. Drawing a planned area of craniotomy on the skull with a pencil. Circle is where burr hole will be put and lines are where craniotome will cut the skull.
|-
|[[File:Fig05.jpg|400px]] || Titanium screws are implanted as an anchor for fixing a connector on the skull. This can be done after completing ECoG implantation, but it might be safer to do before craniotomy.
|-
|[[File:Fig06.jpg|400px]] || Burr holes are made with a perforator. The perforator has to be placed perpendicular to the bone surface and should not stop or pull out until the drill stops. It stops automatically when it penetrates the bone. During drilling the bone, drop a saline at the hole with syringe for cooling and washing out drilled bone.
|-
|[[File:Fig07.jpg|400px]] || At the bottom of burr hole, there is a very thin bone flap left. Remove the flap carefully with curette.
|-
|[[File:Fig08.jpg|400px]] || Confirm no bone flap is left and dura has to be fully exposed under burr hole. Gently peel off dura from skull and make epidural space around burr hole. This has to be done in all burr holes.
|-
|[[File:Fig09.jpg|400px]] || Epidural spaces between burr holes are connected. This tunnel will be a working space for Craniotome. Make sure all of epidural spaces underneath lines of bone incision are connected.
|-
|[[File:Fig10.jpg|400px]] || Craniotome is cutting bone on the line. It starts from one hole to the next hole. At the hole where Craniotome is heading, suction tube is pushing dura down to make sufficient working space. Assistant is dropping saline at the cutting edge.
|-
|[[File:Fig11.jpg|400px]] || Craniotome successfully cut the bone all the way around. At this point, the bone piece is still attached to dura at the center.
|-
|[[File:Fig12.jpg|400px]] || Removing the bone piece. The piece has to be lifted up gently from one edge and peel off dura from the piece with spurtle. This process has to be done slowly and carefully. Otherwise, it will tear dura easily.
|-
|[[File:Fig13.jpg|400px]] || Now dura is exposed. Wash the area and remove bone tips and stop bleeding if there is. Before cutting dura, put two traction sutures with 4-0 silk. That is not a time to waste it! Detect trustworthy service and [http://bestwritingservice.com pay for essays] from them. The needle should not penetrate dura but scoop it at 2/3 depth of dura's thickness.
|-
|[[File:Fig14.jpg|400px]] || Elevate dura with traction sutures. One suture is held by assistant and the other by surgeon. The traction sutures are used to enlarge subdural space to prevent damaging brain when opening dura. Touch dura with knife gently in between tractions and cut slowly layer by layer. Cutting doesn't have to be long. ~5mm will be fine. If you cut through dura, you will see transparent liquid (spinal fluid) comes out. But if you don't see the leakage, it is still on the way.
|-
|[[File:Fig15.jpg|400px]] || Cut Bensheet in triangle shape and soak in saline. Insert the sheet into the dura hole gently. This will make safe working space for extending dura incision.
|-
|[[File:Fig16.jpg|400px]] || Cut dura with scissors. When cutting area moves, the sheet has to move together. Incision has to be always made above the sheet to protect brain. Don't cut too close to bone edge, it will make a difficulty when suturing.
|-
|[[File:Fig17.jpg|400px]] || Brain is exposed.
|-
|[[File:Fig18.jpg|400px]] || Insert ECoG array into subdural space. Use flat head forceps to hold the array.
|-
|[[File:Fig19.jpg|400px]] || Place reference electrode in subdural space (between ECoG sheet and dura) and ground electrode in epidural space (between dura and skull).
|-
|[[File:Fig20.jpg|400px]] || Cut artificial dura that fits to the size of dura opening. Insert artificial dura in subdural space. Rim of the artificial dura has to be covered by dura. Put sutures (4-0 PBS: a thread made of biodegradable plastic) at corners.
|-
|[[File:Fig21.jpg|400px]] || Each rim is sutured by uninterrupted suture with PBS.
|-
|[[File:Fig22.jpg|400px]] || Wrap a hole where wires are coming out from subdural space with small piece of fascia and suture it to dura securely for preventing spinal fluid leakage.
|-
|[[File:Fig23.jpg|400px]] || Fix a connector with covering with dental acrylic on screws.
|-
|[[File:Fig24.jpg|400px]] || Drill holes at multiple points around bone edge. These holes will be used for suturing dura to skull.
|-
|[[File:Fig25.jpg|400px]] || Suture dura to bone edge. These sutures will string dura from skull and prevent epidural hemorrhage spreading outside of bone edge. Also it will prevent pushing brain against increased intracranial pressure.
|-
|[[File:Fig26.jpg|400px]] || Cover the area by artificial dura to prevent adhesion between dura and surrounding tissues. Two sutures at lateral end will fix the cover.
|-
|[[File:Fig27.jpg|400px]] || Muscle and fascia are sutured with 4-0 Vycril.
|-
|[[File:Fig28.jpg|400px]] || Skin closed with 4-0 nylon.
|-
|[[File:Fig29.jpg|400px]] || Make a subcutaneous pocket between scapulas and put bone piece in it.
|-
|[[File:Fig30.jpg|400px]] || Close the pocket with 4-0 nylon. This bone will be taken out one to two weeks after the initial surgery and put it back to the original location.
|}

Surgical illustrations ©2011 [http://www.junakurihara.com Juna Kurihara]

Surgical Procedure

2012-02-23T10:28:27Z

Nijcadmin:

{| class="wikitable"
|- Illustration || Procedures |
|-
|[[File:Fig01.jpg|400px]] || Anesthetize a monkey and fix the head on stereotaxic. Attach all of electrode for monitoring vital signal during surgery. Disinfect all of surgical area and cover the area with sterilized drapes.
|-
|[[File:Fig02.jpg|400px]] || Incise a skin with a cautery knife. The galea aponeurotica is cut at the center and gently peeled off from skull with the knife.
|-
|[[File:Fig03.jpg|400px]] || The galea aponeurotica and temporal muscle are removed from skull with scraper until all of surgical area is exposed. Tissues on skull surface have to be wiped out and all of bleeding has to be completely stopped.
|-
|[[File:Fig04.jpg|400px]] || Edge of the skin and the muscles are wrapped with moistened gauze. The gauze has to be kept moistened during the surgery.Traction sutures are put at skin edge under the gauze and the suture is pulled out to ensure a sufficient working space. Drawing a planned area of craniotomy on the skull with a pencil. Circle is where burr hole will be put and lines are where craniotome will cut the skull.
|-
|[[File:Fig05.jpg|400px]] || Titanium screws are implanted as an anchor for fixing a connector on the skull. This can be done after completing ECoG implantation, but it might be safer to do before craniotomy.
|-
|[[File:Fig06.jpg|400px]] || Burr holes are made with a perforator. The perforator has to be placed perpendicular to the bone surface and should not stop or pull out until the drill stops. It stops automatically when it penetrates the bone. During drilling the bone, drop a saline at the hole with syringe for cooling and washing out drilled bone.
|-
|[[File:Fig07.jpg|400px]] || At the bottom of burr hole, there is a very thin bone flap left. Remove the flap carefully with curette.
|-
|[[File:Fig08.jpg|400px]] || Confirm no bone flap is left and dura has to be fully exposed under burr hole. Gently peel off dura from skull and make epidural space around burr hole. This has to be done in all burr holes.
|-
|[[File:Fig09.jpg|400px]] || Epidural spaces between burr holes are connected. This tunnel will be a working space for Craniotome. Make sure all of epidural spaces underneath lines of bone incision are connected.
|-
|[[File:Fig10.jpg|400px]] || Craniotome is cutting bone on the line. It starts from one hole to the next hole. At the hole where Craniotome is heading, suction tube is pushing dura down to make sufficient working space. Assistant is dropping saline at the cutting edge.
|-
|[[File:Fig11.jpg|400px]] || Craniotome successfully cut the bone all the way around. At this point, the bone piece is still attached to dura at the center.
|-
|[[File:Fig12.jpg|400px]] || Removing the bone piece. The piece has to be lifted up gently from one edge and peel off dura from the piece with spurtle. This process has to be done slowly and carefully. Otherwise, it will tear dura easily.
|-
|[[File:Fig13.jpg|400px]] || Now dura is exposed. Wash the area and remove bone tips and stop bleeding if there is. Before cutting dura, put two traction sutures with 4-0 silk. If you have problems with finding a reliable [http://www.bestwritingservice.com/essay-service.html essay service] that offers assistance not only with creating essays but term and research paper writing as well, I highly recommend you to visit BestWritingService.Com. The needle should not penetrate dura but scoop it at 2/3 depth of dura's thickness.
|-
|[[File:Fig14.jpg|400px]] || Elevate dura with traction sutures. One suture is held by assistant and the other by surgeon. The traction sutures are used to enlarge subdural space to prevent damaging brain when opening dura. Touch dura with knife gently in between tractions and cut slowly layer by layer. Cutting doesn't have to be long. ~5mm will be fine. If you cut through dura, you will see transparent liquid (spinal fluid) comes out. But if you don't see the leakage, it is still on the way.
|-
|[[File:Fig15.jpg|400px]] || Cut Bensheet in triangle shape and soak in saline. Insert the sheet into the dura hole gently. This will make safe working space for extending dura incision.
|-
|[[File:Fig16.jpg|400px]] || Cut dura with scissors. When cutting area moves, the sheet has to move together. Incision has to be always made above the sheet to protect brain. Don't cut too close to bone edge, it will make a difficulty when suturing.
|-
|[[File:Fig17.jpg|400px]] || Brain is exposed.
|-
|[[File:Fig18.jpg|400px]] || Insert ECoG array into subdural space. Use flat head forceps to hold the array.
|-
|[[File:Fig19.jpg|400px]] || Place reference electrode in subdural space (between ECoG sheet and dura) and ground electrode in epidural space (between dura and skull).
|-
|[[File:Fig20.jpg|400px]] || Cut artificial dura that fits to the size of dura opening. Insert artificial dura in subdural space. Rim of the artificial dura has to be covered by dura. Put sutures (4-0 PBS: a thread made of biodegradable plastic) at corners.
|-
|[[File:Fig21.jpg|400px]] || Each rim is sutured by uninterrupted suture with PBS.
|-
|[[File:Fig22.jpg|400px]] || Wrap a hole where wires are coming out from subdural space with small piece of fascia and suture it to dura securely for preventing spinal fluid leakage.
|-
|[[File:Fig23.jpg|400px]] || Fix a connector with covering with dental acrylic on screws.
|-
|[[File:Fig24.jpg|400px]] || Drill holes at multiple points around bone edge. These holes will be used for suturing dura to skull.
|-
|[[File:Fig25.jpg|400px]] || Suture dura to bone edge. These sutures will string dura from skull and prevent epidural hemorrhage spreading outside of bone edge. Also it will prevent pushing brain against increased intracranial pressure.
|-
|[[File:Fig26.jpg|400px]] || Cover the area by artificial dura to prevent adhesion between dura and surrounding tissues. Two sutures at lateral end will fix the cover.
|-
|[[File:Fig27.jpg|400px]] || Muscle and fascia are sutured with 4-0 Vycril.
|-
|[[File:Fig28.jpg|400px]] || Skin closed with 4-0 nylon.
|-
|[[File:Fig29.jpg|400px]] || Make a subcutaneous pocket between scapulas and put bone piece in it.
|-
|[[File:Fig30.jpg|400px]] || Close the pocket with 4-0 nylon. This bone will be taken out one to two weeks after the initial surgery and put it back to the original location.
|}

Surgical illustrations ©2011 [http://www.junakurihara.com Juna Kurihara]

EEG-ECoG recording

2012-02-02T18:33:21Z

Nijcadmin:

== '''20110607S2_EEGandECoG_Su_Oosugi+Naoya-Nagasaka+Yasuo-Hasegawa+Naomi_mat_ECoG128-EEG18''' ==

== Oosugi Naoya ==
*;Data
*:ECoG05_anesthesia.mat and EEG05_anesthesia.mat
*;Processing
*:The data were processed in Matlab.
**;Band-pass filter
**:4th order butter worth filter(Signal Processing Toolbox)
**;Regression
**:PCA+Linear regression(Statistics Toolbox) 
**::PCA was used as whitening.
**;Model Estimation
**:4-fold cross validation test
**::It did NOT destroy the structure of time-series.
**;Prediction rate
**:Correlation coefficient between test data and predicted data
*;Result
[[File:EEG_head_map_1_45.png|500px]]
*;1. Plotted EEG time points prediction rate via ECoG time points on head map
*:EEGs and ECoGs were bandpass-filtered between 1 and 45 Hz. Color bar means prediction rate. Black points means locations of EEG channels(without Cz) but these are not correct because this subject is monkey! This figure shows that all EEG channels can be predicted via ECoG and prediction rate of left EEGs is better than right.
[[File:bp_all.png|500px]]
*;2. Compared EEG prediction rate via ECoG during time-frequency bands
*:EEGs and ECoGs were bandpass-filtered in the time-frequency bands of Theta(between 4 and 7Hz), Alpha(between 8 and 13Hz), low Beta(between 14 and 20Hz), high Beta(between 21 and 30Hz) and Gamma(between 31 and 45Hz). x-axis means time-frequency bands and y-axis means locations of EEG channels. Color bar means prediction rate. This figure shows high frequency components of EEGs are harder to be predicted via ECoGs.
[[File:Theta.png|500px]]
*;3. Prediction rate of EEGs in the frequency band of Theta via ECoGs in the frequency band of Theta or not
*:EEGs in the frequency band of Theta were predicted via ECoGs in the frequency band of Theta and ECoGs without the frequency band of Theta(bandcut-filtered between 4 and 7Hz). x-axis means locations of EEG channels and y-axis means prediction rate. Blue bar means prediction rate of Thete EEGs via Theta ECoGs and red bar means prediction rate of Theta EEGs via EEGs without Theta components. This figure shows the time-frequency band of EEG and ECoG is very similar.
[[File:T8_1_45.png|500px]]
*;4.ECoG prediction rate via EEG in the time-frequency between 1 and 45Hz
*:EEGs and ECoGs were bandpass-filtered between 1 and 45 Hz. Color points means locations of ECoG electrodes and [R = prediction rate * 255, G = 0, B = 0](If prediction rate < 0 then R = 0). This figure shows EEGs include informations of low frequency components of ECoG.
[[File:T8_60_100.png|500px]]
*;5.ECoG prediction rate via EEG in the time-frequency between 60 and 100Hz
*:EEGs and ECoGs were bandpass-filtered between 60 and 100 Hz. Color points means locations of ECoG electrodes and [R = prediction rate * 255, G = 0, B = 0](If prediction rate < 0 then R = 0). This figure shows EEGs do NOT include informations of high frequency components of ECoG.
[http://write-my.com/ write my essay]

Surgical Procedure

2012-01-13T07:55:01Z

Nijcadmin:

{| class="wikitable"
|- Illustration || Procedures |
|-
|[[File:Fig01.jpg|400px]] || Anesthetize a monkey and fix the head on stereotaxic. Attach all of electrode for monitoring vital signal during surgery. Disinfect all of surgical area and cover the area with sterilized drapes.
|-
|[[File:Fig02.jpg|400px]] || Incise a skin with a cautery knife. The galea aponeurotica is cut at the center and gently peeled off from skull with the knife.
|-
|[[File:Fig03.jpg|400px]] || The galea aponeurotica and temporal muscle are removed from skull with scraper until all of surgical area is exposed. Tissues on skull surface have to be wiped out and all of bleeding has to be completely stopped.
|-
|[[File:Fig04.jpg|400px]] || Edge of the skin and the muscles are wrapped with moistened gauze. The gauze has to be kept moistened during the surgery.Traction sutures are put at skin edge under the gauze and the suture is pulled out to ensure a sufficient working space. Drawing a planned area of craniotomy on the skull with a pencil. Circle is where burr hole will be put and lines are where craniotome will cut the skull.
|-
|[[File:Fig05.jpg|400px]] || Titanium screws are implanted as an anchor for fixing a connector on the skull. This can be done after completing ECoG implantation, but it might be safer to do before craniotomy.
|-
|[[File:Fig06.jpg|400px]] || Burr holes are made with a perforator. The perforator has to be placed perpendicular to the bone surface and should not stop or pull out until the drill stops. It stops automatically when it penetrates the bone. During drilling the bone, drop a saline at the hole with syringe for cooling and washing out drilled bone.
|-
|[[File:Fig07.jpg|400px]] || At the bottom of burr hole, there is a very thin bone flap left. Remove the flap carefully with curette.
|-
|[[File:Fig08.jpg|400px]] || Confirm no bone flap is left and dura has to be fully exposed under burr hole. Gently peel off dura from skull and make epidural space around burr hole. This has to be done in all burr holes.
|-
|[[File:Fig09.jpg|400px]] || Epidural spaces between burr holes are connected. This tunnel will be a working space for Craniotome. Make sure all of epidural spaces underneath lines of bone incision are connected.
|-
|[[File:Fig10.jpg|400px]] || Craniotome is cutting bone on the line. It starts from one hole to the next hole. At the hole where Craniotome is heading, suction tube is pushing dura down to make sufficient working space. Assistant is dropping saline at the cutting edge.
|-
|[[File:Fig11.jpg|400px]] || Craniotome successfully cut the bone all the way around. At this point, the bone piece is still attached to dura at the center.
|-
|[[File:Fig12.jpg|400px]] || Removing the bone piece. The piece has to be lifted up gently from one edge and peel off dura from the piece with spurtle. This process has to be done slowly and carefully. Otherwise, it will tear dura easily.
|-
|[[File:Fig13.jpg|400px]] || Now dura is exposed. Wash the area and remove bone tips and stop bleeding if there is. Before cutting dura, put two traction sutures with 4-0 silk. The process of [http://www.marvelousessays.com essay writing] will be much easier with MarvelousEssays.Com as there are a lot of highly professional and talented writers who are always eager to help you out with any sort of academic assignments regardless of the complexity levels. EssaysExperts.Com is the company which first and main priority was, is and will be customers� satisfaction with the [http://www.essaysexperts.com essays online]. If you still have no idea where to buy your writing tasks, this company is the best option for you. I do know what I�m talking about! The needle should not penetrate dura but scoop it at 2/3 depth of dura's thickness.
|-
|[[File:Fig14.jpg|400px]] || Elevate dura with traction sutures. One suture is held by assistant and the other by surgeon. The traction sutures are used to enlarge subdural space to prevent damaging brain when opening dura. Touch dura with knife gently in between tractions and cut slowly layer by layer. Cutting doesn't have to be long. ~5mm will be fine. If you cut through dura, you will see transparent liquid (spinal fluid) comes out. But if you don't see the leakage, it is still on the way.
|-
|[[File:Fig15.jpg|400px]] || Cut Bensheet in triangle shape and soak in saline. Insert the sheet into the dura hole gently. This will make safe working space for extending dura incision.
|-
|[[File:Fig16.jpg|400px]] || Cut dura with scissors. When cutting area moves, the sheet has to move together. Incision has to be always made above the sheet to protect brain. Don't cut too close to bone edge, it will make a difficulty when suturing.
|-
|[[File:Fig17.jpg|400px]] || Brain is exposed.
|-
|[[File:Fig18.jpg|400px]] || Insert ECoG array into subdural space. Use flat head forceps to hold the array.
|-
|[[File:Fig19.jpg|400px]] || Place reference electrode in subdural space (between ECoG sheet and dura) and ground electrode in epidural space (between dura and skull).
|-
|[[File:Fig20.jpg|400px]] || Cut artificial dura that fits to the size of dura opening. Insert artificial dura in subdural space. Rim of the artificial dura has to be covered by dura. Put sutures (4-0 PBS: a thread made of biodegradable plastic) at corners.
|-
|[[File:Fig21.jpg|400px]] || Each rim is sutured by uninterrupted suture with PBS.
|-
|[[File:Fig22.jpg|400px]] || Wrap a hole where wires are coming out from subdural space with small piece of fascia and suture it to dura securely for preventing spinal fluid leakage.
|-
|[[File:Fig23.jpg|400px]] || Fix a connector with covering with dental acrylic on screws.
|-
|[[File:Fig24.jpg|400px]] || Drill holes at multiple points around bone edge. These holes will be used for suturing dura to skull.
|-
|[[File:Fig25.jpg|400px]] || Suture dura to bone edge. These sutures will string dura from skull and prevent epidural hemorrhage spreading outside of bone edge. Also it will prevent pushing brain against increased intracranial pressure.
|-
|[[File:Fig26.jpg|400px]] || Cover the area by artificial dura to prevent adhesion between dura and surrounding tissues. Two sutures at lateral end will fix the cover.
|-
|[[File:Fig27.jpg|400px]] || Muscle and fascia are sutured with 4-0 Vycril.
|-
|[[File:Fig28.jpg|400px]] || Skin closed with 4-0 nylon.
|-
|[[File:Fig29.jpg|400px]] || Make a subcutaneous pocket between scapulas and put bone piece in it.
|-
|[[File:Fig30.jpg|400px]] || Close the pocket with 4-0 nylon. This bone will be taken out one to two weeks after the initial surgery and put it back to the original location.
|}

Surgical illustrations ©2011 [http://www.junakurihara.com Juna Kurihara]

Surgical Procedure

2012-01-12T08:40:33Z

Nijcadmin:

{| class="wikitable"
|- Illustration || Procedures |
|-
|[[File:Fig01.jpg|400px]] || Anesthetize a monkey and fix the head on stereotaxic. Attach all of electrode for monitoring vital signal during surgery. Disinfect all of surgical area and cover the area with sterilized drapes.
|-
|[[File:Fig02.jpg|400px]] || Incise a skin with a cautery knife. The galea aponeurotica is cut at the center and gently peeled off from skull with the knife.
|-
|[[File:Fig03.jpg|400px]] || The galea aponeurotica and temporal muscle are removed from skull with scraper until all of surgical area is exposed. Tissues on skull surface have to be wiped out and all of bleeding has to be completely stopped.
|-
|[[File:Fig04.jpg|400px]] || Edge of the skin and the muscles are wrapped with moistened gauze. The gauze has to be kept moistened during the surgery.Traction sutures are put at skin edge under the gauze and the suture is pulled out to ensure a sufficient working space. Drawing a planned area of craniotomy on the skull with a pencil. Circle is where burr hole will be put and lines are where craniotome will cut the skull.
|-
|[[File:Fig05.jpg|400px]] || Titanium screws are implanted as an anchor for fixing a connector on the skull. This can be done after completing ECoG implantation, but it might be safer to do before craniotomy.
|-
|[[File:Fig06.jpg|400px]] || Burr holes are made with a perforator. The perforator has to be placed perpendicular to the bone surface and should not stop or pull out until the drill stops. It stops automatically when it penetrates the bone. During drilling the bone, drop a saline at the hole with syringe for cooling and washing out drilled bone.
|-
|[[File:Fig07.jpg|400px]] || At the bottom of burr hole, there is a very thin bone flap left. Remove the flap carefully with curette.
|-
|[[File:Fig08.jpg|400px]] || Confirm no bone flap is left and dura has to be fully exposed under burr hole. Gently peel off dura from skull and make epidural space around burr hole. This has to be done in all burr holes.
|-
|[[File:Fig09.jpg|400px]] || Epidural spaces between burr holes are connected. This tunnel will be a working space for Craniotome. Make sure all of epidural spaces underneath lines of bone incision are connected.
|-
|[[File:Fig10.jpg|400px]] || Craniotome is cutting bone on the line. It starts from one hole to the next hole. At the hole where Craniotome is heading, suction tube is pushing dura down to make sufficient working space. Assistant is dropping saline at the cutting edge.
|-
|[[File:Fig11.jpg|400px]] || Craniotome successfully cut the bone all the way around. At this point, the bone piece is still attached to dura at the center.
|-
|[[File:Fig12.jpg|400px]] || Removing the bone piece. The piece has to be lifted up gently from one edge and peel off dura from the piece with spurtle. This process has to be done slowly and carefully. Otherwise, it will tear dura easily.
|-
|[[File:Fig13.jpg|400px]] || Now dura is exposed. Wash the area and remove bone tips and stop bleeding if there is. Before cutting dura, put two traction sutures with 4-0 silk. The process of [http://www.marvelousessays.com essay writing] will be much easier with MarvelousEssays.Com as there are a lot of highly professional and talented writers who are always eager to help you out with any sort of academic assignments regardless of the complexity levels. I do know what I�m talking about! The needle should not penetrate dura but scoop it at 2/3 depth of dura's thickness.
|-
|[[File:Fig14.jpg|400px]] || Elevate dura with traction sutures. One suture is held by assistant and the other by surgeon. The traction sutures are used to enlarge subdural space to prevent damaging brain when opening dura. Touch dura with knife gently in between tractions and cut slowly layer by layer. Cutting doesn't have to be long. ~5mm will be fine. If you cut through dura, you will see transparent liquid (spinal fluid) comes out. But if you don't see the leakage, it is still on the way.
|-
|[[File:Fig15.jpg|400px]] || Cut Bensheet in triangle shape and soak in saline. Insert the sheet into the dura hole gently. This will make safe working space for extending dura incision.
|-
|[[File:Fig16.jpg|400px]] || Cut dura with scissors. When cutting area moves, the sheet has to move together. Incision has to be always made above the sheet to protect brain. Don't cut too close to bone edge, it will make a difficulty when suturing.
|-
|[[File:Fig17.jpg|400px]] || Brain is exposed.
|-
|[[File:Fig18.jpg|400px]] || Insert ECoG array into subdural space. Use flat head forceps to hold the array.
|-
|[[File:Fig19.jpg|400px]] || Place reference electrode in subdural space (between ECoG sheet and dura) and ground electrode in epidural space (between dura and skull).
|-
|[[File:Fig20.jpg|400px]] || Cut artificial dura that fits to the size of dura opening. Insert artificial dura in subdural space. Rim of the artificial dura has to be covered by dura. Put sutures (4-0 PBS: a thread made of biodegradable plastic) at corners.
|-
|[[File:Fig21.jpg|400px]] || Each rim is sutured by uninterrupted suture with PBS.
|-
|[[File:Fig22.jpg|400px]] || Wrap a hole where wires are coming out from subdural space with small piece of fascia and suture it to dura securely for preventing spinal fluid leakage.
|-
|[[File:Fig23.jpg|400px]] || Fix a connector with covering with dental acrylic on screws.
|-
|[[File:Fig24.jpg|400px]] || Drill holes at multiple points around bone edge. These holes will be used for suturing dura to skull.
|-
|[[File:Fig25.jpg|400px]] || Suture dura to bone edge. These sutures will string dura from skull and prevent epidural hemorrhage spreading outside of bone edge. Also it will prevent pushing brain against increased intracranial pressure.
|-
|[[File:Fig26.jpg|400px]] || Cover the area by artificial dura to prevent adhesion between dura and surrounding tissues. Two sutures at lateral end will fix the cover.
|-
|[[File:Fig27.jpg|400px]] || Muscle and fascia are sutured with 4-0 Vycril.
|-
|[[File:Fig28.jpg|400px]] || Skin closed with 4-0 nylon.
|-
|[[File:Fig29.jpg|400px]] || Make a subcutaneous pocket between scapulas and put bone piece in it.
|-
|[[File:Fig30.jpg|400px]] || Close the pocket with 4-0 nylon. This bone will be taken out one to two weeks after the initial surgery and put it back to the original location.
|}

Surgical illustrations ©2011 [http://www.junakurihara.com Juna Kurihara]