Gilroy - Deep Back

8/2/2019 Gilroy - Deep Back

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Muscle Facts (lll)The deep intrinsic back muscles are divided into two grouPs:transversospinal and deep segmental muscles. The transverso-

spinalis muscles pass between the transverse and spinous prthe vertebrae.

Muscle Origin lnsertion lnnervation Action

:Multifidus@

, O Rotatores breves :Rotatores i :: @ Rotatores longi iT1 *T1 2 (between transverse and spinous processes of19i.::Lty"-lt9bf9-")T1 -T1 2 (between transverse and spinous processes' skippinggl. u"*.-bll).C2-sacrum (between transverse and spinous processes,skipping two to four vertebrae)

Occipital bone (betweensuperior and inferior nuchallines)

T1-T6(tr:ansverseprocesses) I C2-C5.(spinous processes):.......-...T6-T1 2 (transverse processes) : C6-T4 (spinous processes)

Semispinalis.

: Biloterol: Extends throacic sPine: Unilaterol: Rotates spine to oppo:-'......--...: Bilaterol: Extends sPinespinal nn. , IJnilaterol: Flexes spine to same s(posterior itooppositesideramr) : Biloterol: Extends thoracic and ce: and head (stabilizes craniovertebii lJnilaterol: Bends head, cervical.ai spines to same side, rotates to o

Fig.2.12 Deep segmental m(schematic)Posterior view.

: @ Semispinalis caPitis ISemispinalis : :, @ Semispinalis cervicisi'.-...':', @semispinalisthoracis :

C4*T7 (trdnsverse andarticular processes)

Fig. 2.1 1 Transversospinalis muscles (schematic)Posterior view.

A Rotatoresnnrscles. B Multifidus.

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Muscle Origin lnsertion lnnervation Actionlnterspinales* i @,11t::ri':F:*yi:i'

: @ lnterspinales lumbqrumcl -cr llelw111 :ping:: tfg."::es ol,a.di:Tnl )/-ell:?l:")L1 -15 (b.etween spinous processes of adjacent vertebrae)

Exl.ends cervical and lu

Biloteral: Stabilizes andcervical and lumbar spLJnilateral: Bends the cluinbar spines laterally

Bilaterol: Extends thoraIJniloteral: BendS thorasame side, rotates Lo o

Spinal nn.(posteriorT*ilSpinal nn.(ant9rl9r 1am1l

lnter-transversarii *

lntertra.nsversarii anteriorescervicis@ lntertransversarii

posteriores cervicis@ lntertra nsversa.rii medialeslumborum

| @ lnteftransversarii laterales: Iumboium:........"..i @ Levatores costarum breVes@ Levatores costarum longi

C2-C7 (between anterior tubercles of adjacent vertebrae)

C2 C7 (between posterlor tubercles of adjacent vertebrae)

Ll -15 (between mammillary processes of adjacent vertebrae)

L1 -15 (between transverse processes of adjacdnt vertebrae)'''.-t'I Costal angle of next lowei ribC7-Tl 1 (transverse processes) : cl.trir"gf" li riil;;i vertebrae below

: Spinal nn.I (Posteriori rami)

Levatorescostarum. Both the interspinales and intertransversarii muscles traverse the entire spine; only their clinically relevant components have been included'


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MuscleSuperficial intrinsic

Origin ActionPosteriorserratus

Splenius

A Posteriorserratus.

Spleniusmuscles

O Posterior serratussupelior

O Posterior serratuslnfelloJ

@ Splenius capitis@ Splenius cervicis

Ligamentum nuchae;C7-T3 {spinous processes)T1 1 -12 (spinous processes)Liqamentum nuchae;c7-r3 J:p!nou: plo..::::)T3-T6 (spinous processes)

2nd-4th ribs (superior borders)8thr1 2l h ribs (in[erior borders,n"rr:ngl"r) .. ... .... .. .Occipital bone (lateral superiornuchal line; mastoid p-rocess)C1 -C2 (transverse processes)

Spinal nn. T2-T5{anteliglf:milSpinal nn. T9-T1 2lantelio:l:mllSpinal nn. C1 -C6(posterior rami, lateralbra nches)

Elevates ribs

Depresses ribsSii lotte?rol:ert"nd, ."rui..l spine

Uniloterol: Flexes and rotates hesame side

Fig. 2.8 Superficial intrinsic backmuscles (schematic)Right side, posterior view.

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Fig.2.9 lntermediate intrinsic back muscles (schematic)Right side, posterior view. These muscles are collectively known as the erector s

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A lliocostalismuscles.

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B Longissimusmuscles.

Spina lismuscles.

Origin lnsertion lnnervation Actionlliocostalis

Longissimus

o !lioco:tgtl: ceryici:@- l!iocosta 11; lholaci;O lliocostalis lumborum

@ Longissimus capitis:.I Longt5stmus ceTVtcts@ Longissimus thoracis

:_.\Lr.r 5prnalts cervtcts@ Spinalis thoracis

3rd-7th ribs7th-1 2th ribsSacrum; iliac crest;thoracolumbar fasciaT1 -T3 (transverse processes);C4-C7 (transverse and articularProces:e:)T1 -T6 (transverse Rroces;e;)Sacrum; iliac crest; lumbarvertebrae (spinous processes):lower thoracic vertebrae(tra nsverse processes)C5-T2 (spinous processes)I 1 0-13 (spinous Oro."rr"r.lateral surfaces)

C4 -C6 (transverse processes)1 st-6th ribs6th- 1 2th ribs; thoracolumbar fascia(deep layer); upper lumbar vertebrae(Lransverse processes)

Temporal bone (mastoid process)

L2-L5 (transverse processes)2nd-1 2th ribs; lumbar vertebrae(costal processes); thoracic vertebrae(transverse processes)

L2-L5 (sprnous processes)T2-T8 (splnous processes, lateralsurfaces)

Biloteral: Extends spUniloterol: Bends spito same side

Biloterol: Extends heUniloterol: Flexes anhead to;ame lidgBilotero l'. Extends spUniloterol: Bends spto same side

Bilatero l: Extends ceand thoracic spineUnilaterol: Bends cethoracic spine to sa

Spinal nn. C8-11(posterior rami,lateral branches)

Spinal nn. C1 -15(posterior rami,lateral branches)

Spinal nn.(posterior rami)

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Gilroy - Deep Back