Final Back Muscles Flashcards
Superficial muscles of back
trapezius
lats dorsi
levator scap
rhomboids
Intermediate back muscles
serratus posterior superior
serratus posterior inferior
Intrinsic back muscles
maintain posture and control movements of vertebral column
extend from pelvis to cranium
enclosed by deep fascia
innervated by posterior rami of spinal nerves
has multiple layers
Superficial intrinsic back
splenius capitus
splenius cervicis
Intermediate intrinsic back
erector spinae
iliocostalis
longissimus
spinalis
Deep intrinsic back
transversospinalis group
semispinalis
multifidus
rotatores
OTHER –interspinales, intertranversarii, levator costae
Contralateral rotation of AA joint
SCM
semispinalis capitis
Ipsilateral rotation of AA joint
obliquus capitis inferior
rectus capitis major and minor
longissimus capitis
splenius capitis
Rectus capitis post major
O: axis
I: occipital bone
A: extension and rotation to same side
Rectus capitis post minor
O: atlas
I: occipital bone
A: extension of head
Obliquus capitis inferior
O: axis
I: atlas
A: rotates atlas to same side
Obliquus capitis superior
O: atlas
I: occipital bone
A: extension, lateral flexion to same side
Serratus posterior inferior
O: spinous process of t11-L2
I: last 3-4 ribs
A: assists inspiration by stabilizing the lower ribs
Serratus posterior superior
O: spinous in cervical and thoracic
I: ribs 2-4
A: inspiration by elevating ribs
