Education and Specialization
1988 Çukurova University, Faculty of Medicine
1996 Numune Training and Research Hospital, Neurosurgery Specialist
2010 Hacettepe University, Institute of Health Sciences

Experience
2023 İSÜ Medical Park Gaziosmanpaşa
2022-2023 Acıbadem Healthcare Group, Bakırköy Hospital
2020-2022 Turkey Hospital
2019-2020 University of California, San Francisco (UCSF), San Francisco, California, USA
2018-2019 Acıbadem Healthcare Group, International Hospital
2015-2018 Memorial Healthcare Group, Şişli Hospital
2014-2015 University of California, San Francisco (UCSF), San Francisco, California, USA
2013-2013 University of California, San Francisco (UCSF), San Francisco, California, USA
2011-2015 Professor and Head, Department of Neurosurgery, Faculty of Medicine, Selçuk University
2006-2011 Head, Department of Neurosurgery, Faculty of Medicine, Mustafa Kemal University
2002-2006 Numune Training and Research Hospital, Neurosurgery
2001-2002 Chief of Neurosurgery, Sadi Konuk Training and Research Hospital
1999-2001 Chief Assistant, Neurosurgery Clinic, Numune Training and Research Hospital
1998-1999 Specialist and Lieutenant, Neurosurgery Clinic, Diyarbakır Military Hospital
1996-1998 Chief Assistant, Neurosurgery Clinic, Numune Training and Research Hospital

Courses and Certifications
2012 Yeditepe University, Istanbul, Microsurgery - Prof. Dr. Gazi Yaşargil
2002 University of Florida, Gainesville, FL, USA, Skull Base and Microanatomy - Prof. Dr. Albert L. Rhoton Jr.
1997 Krankenhaus Nordstadt, Hannover, Germany, Skull Base and Peripheral Nerve Surgery - Prof. Dr. Madjid Samii
1995 University of Illinois at Chicago, Chicago, IL, USA, Neurovascular Surgery, Stereotactic Surgery - Prof. Dr. James I. Ausman and Prof. Dr. Manuel Dujovny
1994 Hacettepe University, Faculty of Medicine, Ankara

Professional Memberships
2015 European Skull Base Society
2015 Turkish Skull Base Society
2013 Founding Member, Turkish Neuro-Oncology Association
2009 Congress of Neurological Surgeons, USA
1998 Turkish Neurology Association
1997 Turkish Neuroscience Society
1996 Turkish Neurosurgery Association
1988 Turkish Medical Association

Uluslararası Hakemli Dergilerde Yayımlanan Makaleler
1. Alex J. Smith, Gokhan Akdemir, Meetu Wadhwa, Dan Song, Alan S. Verkman. Application of fluorescent dextrans to the brain surface under constant pressure reveals AQP4-independent solute uptake. J Gen Physiol. 2021 Aug 2; 153(8): doi: 10.1085/jgp.202112898
2. Elmaci I, Altinoz MA, Akdemir G, Sari R, Baskan O, Ozpinar A, Hacker E, Sav A. Neurosurgical and neuro-immunological management of IgG4- related hypertrophic sclerosing pachymeningitis. A literature survey and discussion of a unique index case. Clin Neurol Neurosurg. 2021 Jan;200:106342. doi: 10.1016/j.clineuro.2020.106342
3. Ozdemir H, Sumer S, Karabagli H, Akdemir G, Caliskaner AZ, Artac H. B cell aplasia and hypogammaglobulinemia associated with levetiracetam. Ann Saudi Med. 2018 Jan-Feb;38(1):65-68. doi: 10.5144/0256-4947.2018.09.01
4. Akdemir G, Kaymaz F , Gursoy-Özdemir Y , Akalan N, Akdemir ES. The time course changes in expression of aquaporin 4 and aquaporin 1 following global cerebral ischemic edema in rat. Surg Neurol Int. 2016 Jan 6;7:4. doi: 10.4103/2152-7806.173316.
5. Akdemir G, Ratelade J, Asavapanumas N, Verkman AS. Neuroprotective effect of aquaporin-4 deficiency in a mouse model of severe global cerebral ischemia produced by transient 4-vessel occlusion. Neurosci Lett. 2014 Jun 27;574:70-5. doi: 10.1016/j.neulet.2014.03.073. Epub 2014 Apr 6.
6. Koktekir E, Ceylan D, T atarli N, Karabagli H, Recber F , Akdemir G. Accuracy of fluoroscopically- assisted pedicle screw placement: analysis of 1,218 screws in 198 patients. Spine J. 2014 Aug 1;14(8):1702-8. doi: 10.1016/j.spinee.2014.03.044. Epub 2014 Apr 4.
7. Koktekir E, Koktekir BE, Karabagli H, Gedik S, Akdemir G. Resolution of papilledema after endoscopic third ventriculostomy versus cerebrospinal fluid shunting in hydrocephalus: a comparative study . JNeurosurg.2014Jun;120(6):1465-70.doi: 10.3171/2014.2.JNS132002. Epub 2014 Mar 28.
8. Gedik GK, Sari O, Köktekir E, Akdemir G. Fluorodeoxyglucose positronemission tomography computed tomography findings in a patient with cerebellar mutism after operation in posterior fossa. Asian J Surg. 2014 Mar 17. pii: S1015-9584(14)00021-9. doi: 10.1016/j.asjsur. 2014.01.004. [Epub ahead of print]
9. Koktekir E, Koktekir BE, Recber F, Akdemir G . Lung adenocarcinoma metastasis to frontal sinus mimicking Pott's puffy tumor. J Craniofac Surg. 2013 Nov;24(6):e538-9. doi: 10.1097SCS. 0b013e318285d98a.
10.Katada R, Akdemir G, Asavapanumas N, Ratelade J, Zhang H, Verkman AS. Greatly improved survival and neuroprotection in aquaporin-4- knockout mice following global cerebral ischemia. FASEB J. 2014 Feb;28(2):705-14. doi: 10.1096/fj.13-231274. Epub 2013 No1.
11. Kaptan H, Koktekir E, Recber F , Akdemir G. Obstructive hydrocephalus caused by giant basilar artery aneurysm. Neurosciences (Riyadh). 2013 Apr;18(2):173-5.
12.Koktekir E, T atarli N, Ceylan D, Koktekir BE, Akdemir G. Symptomatic pneumorrhachis. J Neural Surg A Cent Eur Neurosurg. 2014 Mar;75(2):140-5. doi: 10.1055/s-0032-1333123. Epub 2013 Feb 20. Review.
13.Berker D, Isik S, Aydin Y , Tutuncu Y , Akdemir G, Ozcan HN, Guler S. Thyrotropin secreting pituitary adenoma accompanying a silent somatotropinoma. Turk Neurosurg. 2011;21(3):403-7. doi: 10.5137/1019-5149.JTN.2642-09.2.
14.Akdemir G. Thoracic and lumbar intraforaminal ligaments. J Neurosurg Spine. 2010 Sep;13(3):351-5. doi: 10.3171/2010.3.SPINE09799.
15.Okay O, Daglioglu E, Akdemir G, Dalgic A, Uckun O, Atasoy S, Belen D. Lateral orbitotomy approach to orbital tumors: report of 10 cases. Turk Neurosurg. 2010 Apir; 20 (2): 167 - 72. doi: 10.5137/1019-5149.JTN.2620-09.2.
16.Yilmaz N, Akdemir G, Gezici AR, Basmaci M, Ergungor MF , Asalanturk Y , Beskonakli E, Ucar D. Electrophysiological and clinical assessment of response to surgery in carpal tunnel. Int J Neurosci. 2010 Apr;120(4):261-4. doi: 10.3109/00207451003615748.
17.Serarslan Y , Melek IM, Sangün O, Akçora B, Akdemir G. Macrocephaly and bitemporal arachnoid cysts not associated withglutaric aciduria type I in a child. Turk Neurosurg. 2008 Apr; 18(2):172-6.
18.Ergungor F , Daglioglu E, Akdemir G, Okay O, Dalgic A, Hatipoglu G. Delayed chiasmal herniation after transsphenoidal removal of a pituitary adenoma - case report. Neurol Neurochir Pol. 2008 Jan- Feb;42(1):60-3.
19.Serarslan Y , Melek IM, Duman T , Eraslan T , Akdemir G, Yalçin F . The co- occurrence of Chiari type 1 malformation with syringomyelia and total situs inversus. Med Sci Monit. 2007 Sep; 13(9):CS110-113.
20.Akdemir G, Dağlioğlu E, Seçer M, Ergüngör MF . Hydatid cysts of the internal acoustic canal and jugular foramen. J Clin Neurosci. 2007 Apr;14(4):394-6. Epub 2007 Jan 30.
21.Akdemir G, Ergüngör MF , Sezer M, Albayrak L, Dağlioğlu E, Kilinç K. Therapeutic efficacy of intraventricular cyclosporine A and methylprednisolone on a global cerebral ischemia model in rats. Neurol Res. 2005 Dec;27(8):827-34.
22.Akdemir G, Ergüngör F .Global cerebral ischemic findings in a woman who attempted to commit suicide by hanging. Ulus Travma Acil Cerrahi Derg. 2005 Jul;11(3):250-3. Turkish.
23.Akdemir G, T ekdemir I, Altin L. Transethmoidal approach to the optic canal: surgical and radiological microanatomy . Surg Neurol. 2004 Sep;62(3):268-74; discussion 274.
24.Akdemir G, Dağlioğlu E, Ergüngör MF. Dermoid lesion of the cavernous sinus: case report and review of the literature. Neurosurg Rev. 2004 Oct;27(4):294-8. Epub 2004 Apr 2. Review.
25.Ergün R, Akdemir G, Sen S, T aşçi A, Ergüngör F . Neuroprotective effects of propofol following global cerebral ischemia in rats. Neurosurg Rev. 2002 Mar;25(1-2):95-8.
26.Ergün R, Akdemir G, Gezici AR, T ezel K, Beskonakli E, Ergüngör F , T askin Y . Surgical management of syringomyelia-Chiari complex. Eur Spine J. 2000 Dec;9(6):553-7.
27.Ergün R, Akdemir G, Gezici AR, Kara C, Ergüngör F . Craniocervical neurenteric cyst without associated abnormalities. Pediatr Neurosurg. 2000 Feb;32(2):95-9.28.Ergün R, Okten AI, Akdemir G, Beskonakli E, Gürsoy F , Taskin Y . Cranio-cerebral erosion: delayed diagnosis and treatment. Neurosurg Rev . 1998;21(4):249-53.
29.Ergün R, Bostanci U, Akdemir G, Beşkonakli E, Kaptanoğlu E, Gürsoy F , T aşkin Y . Prognostic value of serum neuron-specific enolase levels after head injury . Neurol Res. 1998 Jul 20(5): 418-20.
30.Akdemir G, Luer MS, Dujovny M, Misra M. Intraventricular atrial natriuretic peptide for acute intracranial hypertension. Neurol Res. 1997 Oct;19(5):515-20. Erratum in: Neurol Res 1997 Dec; 19(6):587.
31.Ergün R, Okten AI, Akdemir G, Beskonakli E. The value of MR imaging in prevention of unsuccessful back surgery . A case report. Acta Radiol. 1997 May;38(3):464-5.
32.Ergün R, Okten AI, Beşkonakli E, Akdemir G, T aşkin Y . Cervical laminar exostosis in multiple hereditary osteochondromatosis: anterior stabilization and fusion technique for preventing instability . Eur Spine J. 1997;6(4):267-9.
33.Başar H, Aydoğanli L, Yüksel M, Başar M, Akdemir G, Kaptanoğlu E. The outcome of urological findings in operated tethered cord patients. Int Urol Nephrol. 1997;29(2):167-71.