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Logan-Tri 1 Anatomy
Deep Back Muscles(Actions, Innervation, etc)
Muscles by Name | Origin | Insertion | Action | Synergist 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) |