颈椎有限元模型研究：运动过程中人体颈椎曲率变化对颈椎的生物力学的影响-影像医学与核医学专业毕业论文.pdf

颈椎有限元模型研究：运动过程中人体颈椎曲率变化对颈椎的生物力学的影响-影像医学与核医学专业毕业论文.pdf优秀毕业论文
A b str a c t
O bjectiv e: T h e pu rp o se o f th is stu dy is to dev elop a d etailed realistic three-
d im en sion al, an atom ically accu rate subject sp ecific finite elem ent m o d el o f th e w h o le
hu m an cerv ical sp in e (C 1-C 7 ) u sin g actu al d ata from a h ealth y v o lu n teer w ith a set o f
con secutiv e C T /M R I im ag es, m im ics an d H yp erm esh so ftw are. W e th en an alyz e
three sim u lated p re trau m a n eck po stu res: n eu tral, h yp erflex io n , h yp erex
ten sion follow ed b y v alid ation w ith resp ect to subject's ow n cap ab ility o f h yp
erflex ion and h yp erexten sion . T h en w e calculate th e m ax im u m sh ear stress distrib
ution in th e sp in al com p o nen ts un d er three sim ulated p ostu re: n orm al lordotic, h yp
erflex ed an d h yp erexten d ed p o sture. B ased on th is, w e w ant to fully u nd erstan d w h
eth er th e ab n orm al n eck p osture (h yp erflex ion/h yp erextension) subjects to greater risk
o f inju ry or d egen eration leadin g to disc b u ld ge or disc protru sion com p ared w ith th e n
orm al lord otic p o h is in tu rn prov ides th eoretical guid an ce for prev en tio n , clin
ical diagn o sis an d treatm en t for b oth cerv ical inju ry an d d isease.
M eth od s: A 2 1 years o ld m ale vo lun teer w ith n o history of cerv ical spin e inju ry or
d isease w as selected as n o rm al su bject. H igh reso lu tio n , 64 sp irals, C T im ag es o f a
n o rm al v o lu n teer's w h o le cerv ical sp in e fro m C I to C 7 w as scan n ed in n o rm al
lo rdotic p o sture alon g w ith h yp erexten ded an d h yp erflexed po s