Anatomy Back

Front 1

Thoracolumbar fascia

Back 1

deep fascia of the back in the thoracic, lumbar and sacral regions, continuous with the deep fascia of cervical and gluteal regions, thickens inferiorly prominently in the lumbar region, trilaminar, all layers unite laterally and attache to the angle of the ribs

Front 2

Posterior layer of thoracolumbar fascia

Back 2

attaches medially to the spinous processes of the thoracic and lumbar vertebrae and median sacral crest, area of origin for latissimus dorsi from about T7 to sacrum

Front 3

Middler later of thoracolumbar fascia

Back 3

attaches medially to the transverse processes of lumbar vertebrae, artificially divide back from posterior ab wall

Front 4

anterior layer of thoracolumbar fascia

Back 4

attaches medially to transverse processes of the thoracic and lumbar vertebrae

Front 5

Splenius group

Back 5

broad and flat, lie deep to the trapezius and deep and medial to the levator scapulae. two muscles in this group, splenius capitus and splenius cervicis

Front 6

Splenius capitus

Back 6

most superior of group
origin: spinous processes of C7-T4 and lower half portion of the ligamentum nuchae
insertion: lateral third of the superior nachal line (occipital bone) and the mastoid process

Front 7

splenius cervicis

Back 7

most inferior of group
origin: spinous processes of T2-T6
insertion: transverse processes of C1-C3

Front 8

Function of Splenius group

Back 8

extensors of the head and neck when contracting bilaterally and rotators of the head and neck when contraction is unilateral

Front 9

Erector Spinae Muscles

Back 9

largest group of the intrinsic back muscles, deep to posterior layer of the thoracolumbar fascia, sometimes called intermediate group of deep back muscles. lie between spinous processes of vertebrae medially and angle of ribs laterally

Front 10

Erector Spinae Muscle fibers span

Back 10

6-10 vertebral levels and all orignate from a broad common tendon attached to the spinous processes of lumbar, lower thoracic, sacrum and iliac crest region. Iliocostalis, longissimus, spinalis

Front 11

Iliocostalis

Back 11

most lateral of all erector spinae muscles and inserts to the angle of ribs and transverse processes of cervical vertebrae

Front 12

iliocostalis lumborum

Back 12

most inferior of group
origin: common ligament of the erector spinae (sacrum/ilica crest level)
insertion: superolaterally to the angle of ribs 6-12

Front 13

iliocostalis thoracis

Back 13

origin: is the angle of ribs 6-12
insertion: is angle of ribs 1-6 and transverse process of C&

Front 14

iliocostalis cervicis

Back 14

most superior of the iliocostalis group
origin: angle of ribs 3-7
insertion: transverse processes of C4-c6

Front 15

Logissimus

Back 15

medial to iliocostalis and lateral to spinalis, attaches to tansverse processes of vertebrae and to ribs lateral to the tubercle (longest)

Front 16

longissimus thoracis

Back 16

most inferior
origin: common ligament of erector spinae and transverse processes of lumbar vertebrae
insertion: transverse processes of thoracic vertebrae and ribs of 3-12 lateral to tubercle

Front 17

longissimus cervicis

Back 17

origin: transverse processes of T1-T5
insertion: transverse processes of C2-C6 superiorly

Front 18

longissimus capitus

Back 18

most superior of group
origin: transverse processes of C4-T4
insertion: mastoid process ( portion of the temporal bone of skull)

Front 19

spinalis

Back 19

most medial or erector spinae muscles, attaches to the spinous processes of T3-T6 inferomedially and to transverse processes of C1-C3 superolaterally

Front 20

Spinalis thoracis

Back 20

most inferior
origin: spinous processes of T10-L2
insertion: spinous processes of T1-T8

Front 21

Spinalis cervicis

Back 21

origin: nuchal ligament and spinous process of c7
insertion: spinous process of c2