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11 terms

extensor muscles of the vertebral column must know

STUDY
PLAY
I. SPINOTRANSVERSE MUSCLES (2)
most superficial of the back muscles only present in neck and upper thorax
1.Splenius Capitis
most superficial of the extenser muscles
attaches to the occipital bone of the head
extends
laterally flexes
rotates head
2.Splenius cervicis
does not attach to the head
extends
laterally flexes
rotates head
II.ERECTOR SPINAE MUSCLES (3)
divided into three paralell regions, medial, intermedate & lateral
3. Iliocostalis muscle
most lateral of the three erector spinae MM's
extends
laterally flexes vertebral column
2.Longissimus muscle
(between iliocostalis and spinalis)
extends vertebral column
1. Spinalis muscle
closest to spine
III. TRANSVERSOSPINALIS MUSCLE (2)
deep muscles
angle laterallyorigin near transverse process
to insertion at base of spinous process
1. Semispinalis
responsible for extension of the spine
2.Multifidus
mutliple muscles
covered by illiocostalis so to work them you have to go through illocostais first
extends vertebral column
IV. SUBOCCIPITAL MUSCLES
deepest of the extensors of the back
there are 4 near the neck