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6 Back Muscle Layers

FAB - Back Layers

What muscles are in the 1st layer? Trapezius & Latissumus dorsi
What muscles are in the 2nd layer? Levator Scapula; Rhomboid major& minor
What muscles are in the 3rd layer? Serratus posterior superior & inferior
What muscles are in the 4th layer? Splenius capitis & cervicis
What muscles are in the 5th layer? 3 Iliocostalis, 3 Longissimus, 3 Spinalis
What muscles are in the 6th layer? 3 Semispinalis, 3 Multifidis, 3 Rotatores
What are the 3 Iliocostalis muscles? Lumborum, Thoracis, Cervicis
What are the 3 longissimus muscles? Thoracis, cervicis, capitis
What are the 3 spinalis muscles? Thoracis, cervicis, capitis
What are the 3 semispinalis muscles? Thoracis, cervicis, capitis
What are the 3 multifidus muscles? lumborum, thoracis, cervicis
What are the 3 rotatores muscles? lumborum, thoracis, cervicis
Serratus Posterior Superior O Lower portion of ligamentum nuchae, SP of C7-T3, supraspinous ligaments
Serratus Posterior Superior I ribs 2-5
Serratus Posterior Superior N Ventral rami T2-T5
Serratus Posterior Superior A Elevates ribs 2-5
Serratus Posterior Inferior O SP
Serratus Posterior Inferior I ribs
Serratus Posterior Inferior N Ventral rami of T9-T12
Serratus Posterior Inferior A Depress ribs 9-12, aids respiration
Splenius capitis O SP
Splenius capitis I Mastoid process; temporal bone; occiput below lateral part of superior nuchal line
Splenius capitis A Extend head bilaterally; lateral flex and rotate face to same side, unilaterally
Splenius capitis N lat. branches of dorsal rami of C5-C7
Which back muscles are "Erector spinae muscles"? Iliocostalis lumborum,
Erector spinae muscles common origin SP and supraspinous ligament of T11-L5; median sacral crest; sacrotuberous ligament; posterior sacroiliac ligament; lateral sacral crest; posteromedial iliac crest
Erector spinae muscles 5th layer
Splenius cervicis O SPs
Splenius cervicis I TPs
Splenius cervicis A extend neck bilaterally; unilaterally lateral flex and rotate face toward same side
Splenius cervicis N lat. branches of dorsal rami of C5-C7
Iliocostalis lumborum O common origin of erector spinae muscles
Iliocostalis lumborum I ribs
Iliocostalis thoracis O ribs
Iliocostalis thoracis I ribs and TP of C7
Iliocostalis cervicis O ribs
Iliocostalis cervicis I TP
Longissimus thoracis O Common origin of erector spinae; TP's and AP's of Lumbar vertebrae
Longissimus thoracis I 3rd-12th ribs; TPs
Longissimus cervicis O TPs
Longissimus cervicis I TPs and APs
Longissimus capitis O TPs; APs
Longissimus capitis I mastoid process temporal bone
Spinalis thoracis O SPs
Spinalis thoracis I SPs
Spinalis cervicis O SPs
Spinalis cervicis I SPs
Spinalis capitis O TPs ; APs , sometimes SP of C7 & T1
Spinalis capitis I Occiput btwn superior and inferior nuchal lines
Action of Iliocostalis and Longissimus muscles Extend and laterally flex spine.
Nerves of Erector spinae muscles Dorsal rami
Action of spinalis thoracis and cervicis Extend spine
Action of spinalis capitis extend head
Created by: thenathan