lumbar anatomy

lumbar anatomy - 5/23/2011 Lumbar Muscuiature Lumbar Spine

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Unformatted text preview: 5/23/2011 Lumbar Muscuiature Lumbar Spine Ai":;.:i'on'1y 8: Arthrokinemati c s 1. Lumbar back muscles 2. Abdominal muscles 3. P502155 Major & Minor PT 65-; 4. Emertransvcrsarii Latcralis & Quadratus La: m ban: in Lumbar back muscle group: Lumbar Back Muscle Group Medial Intertransversarii Medial Intertransversarii ‘ :- 1' ' / .3 Mullifi'édi r Lumbar Lnngissimus ° i...Lm1har ilinucnstfiis 1 E - 'E'hoz‘ncic LOflL-‘I'R‘IEI‘FHW .M 5 Ei‘luk‘k: HRH}: ] Lumbar back muscle group: Multifidi Muitifidi ‘ ‘: .; 'Q‘ a {2'3 ' A z " "f I K. I ' ‘ '3 Note vectors (V 3: H) created in A43 View & extension (ami-ficxion) moment created in lateral View, Multifidi Attach to the ZAPJ capsule Synergistic (afw the abdominals) rotators of {he spree, Prevent flcxlon ofihe spine as you rotate. Also have SB and extension components. Fart of transversospinai muscles, which are contralateral rotators. Lumbar Longissimus Vectors create strong extension and SB forces but poor rotation forces I Not: Lhe‘zr ability to mime ipsilaterally and to create glide along rhe zwaxis, - Can counter the fiexicn cfi'ccrs ofzhe abdominais when creating rotation. Lumbar back muscle group: Lumbar Longissimus LEA is Lumbar Inter-muscular Aponeurosis Lumbar back muscle group: Lumbar Iliocostalis Lumbar back muscle group: Thoracic Lo :lmufi /. . . Note: short mural tar-don 5 of each _____ "Mn-v Note: long caudal tendons of each fiascicle. .V__/ 5/23/2011 -AbEe to produce SB and exft‘mfnr: in :U- om}. ‘ Jv‘oor contributor to lumbar rotation. Caudal :endons’ cur-rtr'ibuzion {o the ereclor spinae aponeuresis (BSA). Lumbar back muscie group: - Abic to produce SB and extension in iumbar (increase ioniosis) ’ Poor curliribnmr 10 lumbar i'utziiinn {mm liciiit'ai. ‘ But, a gig- mml‘mg 211 least. 2‘1d Group: Abdominal Muscle Group i-Lxm'nal ()bliques mus Abdominis ° inicmui Obliques i ' "l‘mnsvea'sc Abdominis i Extei‘mi Obiiques iuiulcsiych ' tin-L; ' H: xiii-w opposite Internal LNJJiLglJif-fi. ' Help form the iaguinai ligament I Acting biiatcraily, serve as flexors. - Lateral fibers make goad SB’S. 5/23/2011 What distinguishes the ist group from the other 3 greups‘? Ameriur' aihcm from ribs 3—8 to [£11m aiba. ,,. .. Lower anterior ' fibers: me mgulnal = Eigamcm and 1C lo pubis and linen alba. External Obligel Luierai fibers From ribs "ME to 5‘ QTS; pubic rubei‘cic, and EC, / mum lul‘ component) and Internai Obiiques Laura! fibers: From 1C and TL fascia ED 10-12 ribs and linca aiba. 5/23/2011 Transverse Abdominis internal Obliques Intcrdi'giiales with diaphragm at' its origin. Right one rotates; thorax to right (El/W opposite External Oblique). Right one rotates pelvis; f‘onvarrl on right side (afw opposite External Oblique). Help form the inguinal ligament. Acting bilaterally, serve as floxors. Lateral fibers make good SB’S. From: inner surface of canilages of lower 6 ribs, TL filSt‘la, EC: and inguinal ligament to linea alba and pubic crest roup: aj 0r & Minor Rails-mi: Rectus Abdominis Actions: Psoas M Note: i . , . i) Fiex, E) Onglms : V abduct van—[ml I I ER hip- surracc or From pubic all luml -: 2) l]lCl€,‘-lu' : crest to TP’s and lordosis, xiphoid and the 5‘5“ .1) SB and ' “ 2) Ensemc- s’otmo )D Of Ember EI'LnI-k ' trochaulm. Opposslg 4lh Group: Quadratus Lumborum A}? From: ILL, .lC, and {occasionally} from 'I‘P’s of L2~5l To: inferior border of121hrib. N --MML~MWIW1 Lumbar Ligaments ALL - PLL 0 EV disc; ° ESL- ' SSE, ‘ Arlécular capsule of film”; facets ° £.§_.L - LP False iigameuts Note breadih MALL Spams L4 Icveis AZ is SWOT]eg adherent to the discs. imam, designed to lake rotatian, Are they avascuiar & aneural? 5/23/2011 Ligamamum Flavum emansverse Ligament Pnsierior \ cngiludlnai - Ligament Ligamem Imampi Ligament _ \ Sppraspinous Anterim ngment Longimdinat Ligamem Spurs 3 levels. Much m are broad 0w; in: disc ‘IH LH'L’! \‘CE'R‘PH'CIC Re.er h s Interspinous 85 Supraspinous Ligaments SSLexm-fia - 5/23/2011 Iliolumbar Ligament Faise Ligaments Museum“ [iii 3"" decade. Rosiz'icts summation oflfi on sacrum in amcrior direciion Osteology 3 functional components Z'ygoapOphyseal mum (Example is 123—4) Pasteriarnmhes: - Prulecr Cord I True -Milscic s ncwi'rl anauhmenis Eirll" ‘ I .s (provldc leverage) J E _ 5‘ I . w H r . . - ,g- “Vi'l'lebl‘aihedlt'i: SWUWML FaLcrs 3cm.c.lon by capsuia H -\-\-‘e§g!1l§neai£se;__: {C} . . 3 ' L 3 mm g S a: a 4 CR (-x- ' i'azmmatihrczcs 53W” 54”” Zygoapophyseal Joints ‘ (Intrawarticular structures) ThOIEiCOlumbaf Fascla { Coronal View ‘ !._.:H'cr';r§ mm- 5 ‘ 3 EEWCI'SI A _ I: IV} 1 {ml \I i, LEes bclnzr-r‘ 0L. ii. Gives rise iaLerally [o aponeurosimFTA‘ — Posterior i Covers hack muscies. ii. Biends with oiher two Layers i aterai to iliocostaiis - ‘ I ‘ lumborumto form LR. FM: fibroadlpose meniscmd; AP: adipose tissue pad; CT: connective tissue rim, 5/23/2011 T-L Fascia (Superficial lamina: La‘Zs1 Relationship) T—L Fascia (Deep lamina: IO & TA Relationship) Lats” iaserlicms w: New: ‘ 3, LIL Anni LB-LS _ _ ‘/—5\ ml Mme KW,“ 1 l 72. remaiuuzu '1' L JunCLéun f 11L Fascia lmcrvm'lebral Fommen Baundaries Laim'ai tensl an appliedviathc LR can produce an “aminfiexion” effect on lhc SP’; lw 3m;le (2| VEL‘iOFSF lhmnghlh: alying‘ l lnlcr'vmiicbral or 2:311:31“; Can Hams i l A 'l‘ll"; ml.” ’= W": TIT-R ' Anuldl cc VL‘imuu meluidkiwLm - DRG. Facet Tropism - Asymmetrical orientation ofthc facets at a given motion segment. ' Incidence: 213% at .all lumbar levels. - Désc at these lcvcls morc SLl.§£(Z-C]'E§ll":i£:1 " ' ‘uring new {it lcwls w 01 forces is uncqml I mml Motion Checkers in Lot‘nbar Spine 7 PLL (4124,) — Posterior arch ligaments (38%) 7 Frontaily oriented facets (esp. limit the anterior translation). 7 Extensor muscles 5/23/2011 Facet Orientation Where tropism exists, more coronally oriented facet side of , (iisc is most vulnerable. ' Motion ("Makers in Lumbar Spine 5/23/2011 Motion Checkers in Lumbar Spine Motion Checkers in Lumbar Spine - Lateral bending: - Rotation: r Opposite Sh:1z’pu}.-"S F r V: OI'Shmpcy’s fihen (35%) £quch ..r H i. scan - Emilmcrm filccz m ' wk‘ '=~:1Ia':-1§.:3-c:2|3 7.9.115 1 Ji .‘5 L (m mim 2-11) ...
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lumbar anatomy - 5/23/2011 Lumbar Muscuiature Lumbar Spine

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