I-hippocampus yindawo yengqondo nje phantsi kwe-lobes temporal medial. Yifana nesimo esifanelekileyo kwi-seahorse, kwaye kukho enye kwicala ngalinye leengqondo ngaphezu kweendlebe.
Oko Kukwenza
I-hippocampus isinceda sihlakulele iinkumbulo ezintsha. Ngamanye amaxesha kubhekwa njengengeniso yeenkumbulo njengokuthi imemori kufuneka idlule kwi-hippocampus ukuba ikwazi ukugcinwa kwi -memory memory bank.
Olunye uphando luye lwabonisa ukuba i-hippocampus ibalulekile ukuba ingabi nje ukudala imemori emitsha kodwa iphinde ibuye ibuke iinkumbulo ezindala.
Ngokuthakazelisayo, i-hippocampus kwicala lasekhohlo ibinomsebenzi omkhulu kwimemori nangolwimi kunalowo osekunene.
Indlela i-Alzheimer's's disease affects the Hippocampus
Uphando lufumene ukuba enye yeengingqi zokuqala kwingqondo echaphazelekayo yi- Alzheimer's disease yi-hippocampus. Iingcali zenzululwazi zidibanise i-atrophy (shrinkage) yeendawo ze-hippocampal kunye nesifo se-Alzheimer's disease. I-Atrophy kule ngingqi yengqondo inceda ukuchaza isizathu sokuba esinye sezibonakaliso zokuqala se-Alzheimer's disease sisoloko singonakali kwimemori, ngakumbi ukubunjwa kweememori ezintsha.
I-Hippocampus i-atrophy iye yadibaniswa kunye nobukho beeprotheni ezakhayo njengoko isifo se-Alzheimer siqhubeka.
Ukungabi Nokonakala kwengqondo
Ngoko, ubukhulu kunye nomthamo we-hippocampus kuchatshazelwa ngokucacileyo ngesifo se-Alzheimer.
Kodwa kuthekani malunga nokukhubazeka okunzulu kwengqondo, imeko edlalwa ngamanye amaxesha, kodwa kungekho rhoqo, iqhubela kwisifo se-Alzheimer?
Ucwaningo luye lwabonisa ukuba i-atrophy ye-hippocampus idibanisa nokuphazamiseka kwengqondo . Enyanisweni, ubukhulu be-hippocampus kunye nesantya sokutshatyalaliswa kwayo kuboniswe ukuba kuqikelele ukuba i-MCI iqhubela kwisifo se-Alzheimer okanye cha.
Umthamo omncinci we-hippocampal kunye nesantya ngokukhawuleza okanye ukulungelelaniswa kwezinto kunye nokuphuhliswa kwengqondo.
Ingaba Umqulu We-Hippocampal Uyakwazi Ukwahlukana Phakathi Kweentlobo ezahlukeneyo zoMdemokhrasi?
Ucwaningo oluthile luye lwalinganisela umthamo we-hippocampal kwaye lujonga indlela ehambelana ngayo nezinye iintlobo zomqondo weengqondo. Enye inokwenzeka ukuba oogqirha bangasebenzisa ubukhulu be- atrophy kwindawo yendawo ye-hippocampal ukuchonga ngokucacileyo ukuba yiyiphi intlobo yesifo somqondo.
Ngokomzekelo, ukuba isifo se-Alzheimer kuphela sisifo sengqondo somdemokhrasi esichaphazela kakhulu ubukhulu be-hippocampus, oku kungasetyenziselwa ukuxilonga kakuhle i-Alzheimer's. Nangona kunjalo, uphando oluninzi luye lwabonisa ukuba le milinganiselo ayinakunceda ekuhlukaniseni iintlobo zeengqondo zeengqondo.
Olunye uphando olushicilelwe kwiphepha le- Neurodegenerative Diseases laphawula ukuba ukunyuka kwe-hippocampus kwenzeke kwi -dementia ye-vascular .
Uphando lwesibini lufumanise ukuba ukunyuka kwe-hippocampal ubukhulu bekunxulumene ne- frontotemporal dementia .
Iingcali zenzululwazi ziye zathola umehluko omkhulu, nangona kunjalo, xa kuthelekiswa noLey body dementia ngesifo se-Alzheimer. Inkunkuma ye-Lewy yomzimba ibonisa i-atrophy engaphantsi kweendawo ze-hippocampal kwingqondo, ehambelana nemiphumo engabonakaliyo kwimemori, ngokukodwa kwimigangatho yangaphambili ye-Lewy yokugula komzimba .
Ngaba Unokuvimbela iHippocampus yakho ekuhlahleni?
Iiplastiki (i-term for the brain's ability to grow and change over time) ye-hippocampus iboniswe ngokuphindaphindiweyo kuphando. Uphando lufumene ukuba, nangona i-hippocampus iyancipha ukuba i-atrophy njengoko sineminyaka yobudala, kokubili ukuzivocavoca umzimba kunye nokukhuthazwa kwengqondo (ukusetyenziswa kwengqondo) kunokunciphisa ukutshatyalaliswa kwaye, ngamanye amaxesha, kubuye kuguqulwe.
Imithombo:
Kliniki yaseCleveland. Lobe yesikhashana. http://my.clevelandclinic.org/anatomy/brain/ns_overview.aspx
I-Dementia ne-Geriatric Disorders Disorders. 2010; 29: 294-300. Ukuhlanganiswa kweMqulu weHippocampal kunye neCerebrospinal Fluid Biomarkers Kuphucula ukuBaluleka kwangaphambili kwiSingqinisiso esifanelekileyo Sokuqonda. http://www.karger.com/Article/Abstract/289814
I-Dementia ne-Geriatric Disorders Disorders. 2012; 34 (1): 44-50. Ukuthelekisa i-hippocampal atrophy kwi-Alzheimer's mind and mental dementia kunye nemizimba ekhohlakeleyo. http://www.ncbi.nlm.nih.gov/pubmed/22922563
Ingxelo yeZifo ze-Alzheimer's. 2013 Jan 1; 36 (1): 57-66. i-doi: 10.3233 / JAD-122293. Ngaba i-hippocampal ivolise impawu efanelekileyo ukuhlula isifo se-Alzheimer kwi-frontotemporal dementia? http://www.ncbi.nlm.nih.gov/pubmed/23542864
Ilahleko leMemori kunye neBrain. Hippocampus. http://www.memorylossonline.com/glossary/hippocampus.html
Uhlolo lweNdalo I-Neurology 8, 189-202 (Epreli 2012). Izinto eziguqulwayo eziguqula ubukhulu be-hippocampus ngokuguga.
Izifo ze-Neurodeergenerative. 2011; 8: 465-469. I-Hippocampal Atrophy kwi-Subcortical Demcular Dementia. http://www.karger.com/Article/FullText/326695
Neurology. NgoMatshi 17, 2009 vol. 72 akukho. 11 999-1007. I-hippocampal atrophy rates kwi-Alzheimer's disease. Ixabiso elongeziweyo kwiimilinganiselo zevolumu yengqondo. http://n.neurology.org/content/72/11/999