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Logan-Tri 1 Anatomy

Deep Back Muscles(Actions, Innervation, etc)

Muscles by NameOriginInsertionActionSynergist muscles
splenius capitis inf. ligamentum nuchae, SP's of C7 - T4 mastoid process of the temporal bone, sup. nuchal line of occipital bone bilaterally- extend the neck, unilaterally- ipsilateral flexion and some ipsilateral rotation splenius cervicis, Semispinalis capitis
iliocostalis lumborum sacrum, ilium, sacrotuberous and posterior sacroiliac ligaments angles of lower 6 ribs acting bilaterally, extension and hyperextension of the spine; Longissimus Thoracis , Quadratus Lumborum
iliocostalis thoracis angles of lower 6 ribs angles of upper 6 ribs, TP of C7 acting bilaterally, extension and hyperextension of the spine; Iliocostalis Lumborum ,Longissimus Thoracis , Spinalis Thoracis , Semispinalis Thoracis
iliocostalis cervicis angles of ribs 3-6 TP's of C4-C6 acting bilaterally, extends and hyperextends the vertebral Splenius Cervicis, ,
longissimus thoracis TP's of L1-L5, deep TLF TP's of T1-T12, angles of ribs 9-10 acting unilaterally, extension of vertebral column and flexion to iliocostalis luborum, Iliocostalis thoracis, Quadratus Lumborum;
longissimus cervicis TP's of T1-T5 TP's and art. processes of C2-C6 acting unilaterally, laterally flexes the neck; acting Semispinalis capitis , [Semispinalis Cervicis ,
longissimus capitis TP's of T1-T5, art. processes of C4-C7 mastoid process of temporal bone acting bilaterally, extends and hyperextends head; acting Semispinalis capitis , spinalis capitis, Longissimus Cervicis
spinalis thoracis SP's of T11-L2 SP's of T1-T4 acting unilaterally, lateral flexion of the spine; acting Semispinalis Thoracis , Longissimus Thoracis , iliocostalis
semispinalis thoracis TP's of T6-T12 SP's of T1-T6 extends the spine and rotates it toward the opposite side; Longissimus Thoracis , Iliocostalis thoracis, Spinalis Thoracis
semispinalis cervicis TP's of T1-T6 SP's of C2-C7 acting bilaterally, extension and hyperextension of the cervical semispialis capitis, Splenius Cervicis, Iliocostalis Cervicis ,
semispinalis capitis TP's of C4-C6 occipital bone extnesion of lateral flexion of the neck and head, and rotates it splenius group, Semispinalis Cervicis ;
multifidus lumborum sacrum, ilium, deep surface of ES tendon SP's of L1-L5 acting unilaterally, lateral flexion and rotation to opposite side; rotators, Interspinales , [Intertransversarii groups
rotatores TP's of most vertebrae SP's of sup. vertebrae acting bilaterally, rotation of the spine to the opposite side; Intertransversarii , Interspinales , Multifidus
intertransversarii TP's of most vertebrae TP's of immediately sup. vertebra acting unilaterally, lateral flexion of the spine; acting interspinalis, rotators, Multifidus
levator costarum TP's of T7-T11 lower ribs, between angles of tubercles elevate the ribs (blank)
Created by: aholzer