back muscles

What is this mm group called?

What mm are in this group?

Innervation?

superficial extrinsic muscles

Trapezius, latissimus dorsi, levator scapulae, rhomboids

Anterior rami of cervical nn.

What m. is this?

Origin, insertion, action, innervation

Trapezius

Origin: nuchal ligament, occipital protuberance, SP C7-T12

Insertion: clavicle, scapular spine

Action: elevate, retract, and rotate scapula

Innervation: CN XI, C3-C4

What m. is this?

O, I, A, N?

Latissimus dorsi

O: SP T7-T12, iliac crest, thoracolumbar fascia

I: intertubercular groove ofhumerus

A: extend, adduct and medially rotate humerus

N: anterior rami

What m. is this?

O, I, A, N?

Rhomboids

O (minor): nuchal ligament, SP C7-T1

O (major): SP T2-T5

I: medial border of scapula

A: retract and rotate scapula, fix scapula to thoracic wall

N: anterior rami

What m. is this?

O, I, A, N?

Levator scapulae

O: TP C1-C4

I: superior angle of scapula

A: elevate and rotate scapula

N: anterior rami

What is this mm group called?

What mm are in this group?

Innervation?

Intermediate extrinsic muscles

Serratus posterior inf. and sup.

Intercostal nn.

What m. is this?

orientation and action

Serratus posterior inferior

deep to lats

A: depress ribs, proprioception of rib cage

What m. is this?

Orientation and action

Serratus posterior superior

Deeps to rhomboids

A: elevate ribs, proprioception of rib cage

What is this mm group called?

What mm are in this group?

Innervation?

Intrinsic superficial back mm

Splenius capitus and splenius cervicis

Anterior rami

What mm?

O, I, A bilateral and unilateral

Splenius capitus

O: nuchal ligament, SP C7-T6

I: mastoid process

A: bi- extend head/neck

uni- ipsilateral flexion of neck and rotation of head

What mm?

O, I, A bilateral and unilateral

Splenius cervicis

O: nuchal ligament, SP of C7-T6

I: TP of C1-C3

A: bi- flexion of head/neck

uni- ipsilateral flexion of neck and rotation of head

What is this mm group called?

What mm are in this group?

Innervation?

Intrinsic intermediate mm

Erector spinae: spinalis, longissimus, iliocostalis

N: dorsal rami

What mm?

O, I, A bilateral and unilateral

Spinalis

O: post. Iliac crest, post. sacrum, SPs of L/S vert

I: SP of C/T vert

A: bi- vertebral column ext. including head/neck

uni- lateral flexion of vert. column

What mm?

O, I, A bilateral and unilateral

Iliocostalis

O: post. Iliac crest, post. sacrum, SPs of L/S vert

I: ribs and TP of cervical vert

A: bi- vertebral column ext. including head/neck

uni- lateral flexion of vert. column

What mm?

O, I, A bilateral and unilateral

Longissimus

O: post. Iliac crest, post. sacrum, SPs of L/S vert

I: ribs and TP of C/T vert., mastoid process

A: bi- vertebral column ext. including head/neck

uni- lateral flexion of vert. column

What is this mm group called?

What mm are in this group?

O, I, A, N (same for all mm in group)

intrinsic deep mm

Semispinalis, multifidus, rototores

O: TPs

I: SPs of more superior vert

A: contralateral rotation, stabilize/extend vert column

N: dorsal rami

What mm?

Rotatores

What mm?

Multifidus

What mm ?

Semispinalis

What is this mm group called?

What mm are in this group?

Intrinsic deep mm

Interapinalis and intertransversarii

What mm?

O, I, A bilateral and unilateral, N

Interspinalis

O and I: unite SPs of consecutive vert

A: aid in extending vert column

N: dorsal rami

What mm?

O, I, A bilateral and unilateral, N

Intertransversarii

O and I: unite TP of consecutive vert

A: bi- stabilize vert column

uni- ipsilateral flexion of vert column, proprioception

N: ventral rami (deepest mm)

What mm group?

What mm in the group?

Innervation?

Suboccipital mm

Rectus capitus major and minor, obliquus capitus superior and inferior

N: suboccipital n, dorsal ramus C1

What mm are these?

O, I, A bilateral and unilateral, N

Rectus capitus posterior major (1) and minor (2)

O: (1) SP C2 , (2) post. arch C1

I: (1) and (2) inferior nuchal line, occipital bone

A: bi- extend head

uni- ipsilateral rotation of head

N: suboccipital n

What mm are these?

O, I, A bilateral and unilateral, N

Obliquus capitus superior (1) and inferior (2)

O: (1) TP C1, (2) SP C2

I: (1) occipital bone and (2) TP C1

A: (1) extension/lateral flexion of head (2) ipsilateral rotation of head

N: suboccipital n