bootcamp: attachment/movement/enervation/blood

name the two spinotransversales muscles

splenius capitis and splenius cervicis

Origin and insertion of splenius capitis

ORIGIN: nuchal ligament + spinous processes of C7, T1, T2,T3

INSERTION: superior nuchal line & mastoid processes

Origin and insertion of splenius cervicis

ORIGIN: spinous process of T3-T6

INSERTION: transverse processes of C1-C3

What artery supples the spinotransversales muscles?

Occipital artery

What motion does unilateral contraction of spinotransversales muscles cause?

Bilateral?

Unilateral: flexion and rotation of neck (to the same side)

Bilateral: extension of the neck

Innervation of splenius cervicis?

Dorsal rami of lower cervical spinal nerves

Innervation of splenius capitis?

Dorsal rami of spinal nerves C2 and C3

Name the three erector spinae groups (lateral to medial)

Iliocostalis, longissimus, spinalis

Action of erector spinae contraction bilaterally?

Unilaterally?

Bilateral: extension of the spine

Unilateral: lateral flexion of the spine (ipsilateral)

All INtrinsic back muscle are innervated by what kind of spinal nerve ramus? (dorsal or ventral)

dorsal ramus

Each group of semispinalis muscles covers how many vertebrae?

4-6 vertebrae

Each group of multifides muscles covers how many vertebrae?

4-2 vertebrae

Each group of rotatores muscles covers how many vertebrae?

1-2 vertebrae

List the transverospinales muscles from SUPERFICIAL to DEEP

most superficial: semispinalis

multifides

least superficial: rotatores

what action does contraction of the rotatores cause when they contract bilaterally? unilaterally?

Bilateral: extension of the spine

Unilateral: rotation of the spine (contralateral)

what action does contraction of the multifides muscles cause when they contract bilaterally? unilaterally?

Bilateral: extension of the spine

Unilateral: lateral flexion of the spine (ipsilateral), rotation of the spine (contralateral)

what action does contraction of the semispinalis muscles cause when they contract bilaterally? unilaterally?

Bilateral: extension of the spine/neck (depending on the region)

Unilateral: lateral flexion of the spine /neck (ipsilateral), rotation of the spine/neck (contralateral) (depending on the region)

what is the suboccipital nerve?

dorsal ramus of C1

origin/insertion of rectus capitis posterior minor

origin: C1

insertion: inferior nuchal line

action caused by bilateral contraction of rectus capitis posterior minor?

extension of atlanto occipital joint

blood supply to rectus capitis posterior minor?

Vertebral artery, descending branch of occipital artery

origin/insertion of rectus capitis posterior major?

origin: spinous process of C2 (axis)

insertion: inferior nuchal line

action caused by bilateral contraction of rectus capitis posterior major? unilateral?

bilateral: extension of the neck

unilateral: rotation of head ipsilateral

blood supply to rectus capitis posterior major?

vertebral artery, descending branches of occipital artery

origin/insertion of obliquus capitis superior

origin: traverse process of C1

insertion: between superior and inferior nuchal line

origin/insertion of obliquus capitis inferior

origin: spinous process of C2

insertion: transverse process C1

innervation of obliquus capitis superior?

suboccipital nerve

innervation of obliquus capitis inferior?

suboccipital nerve

action of bilateral contraction of obliquus capitis superior? unilateral?

bilateral: extension at atlanto occipital joint

unilateral: lateral flexion of head (ipsilateral)

action of bilateral contraction of obliquus capitis inferior? unilateral?

bilateral: extension at atlanto occipital joint

unilateral: lateral rotation of head (ipsilateral)

name two features found within the suboccipital triangle

suboccipital nerve and vertebral artery

origin/insertion of serratus posterior superior?

origin: nuchal ligament, spinous processes of vertebrae c7-t3

insertion: upper border of ribs 2-5

innervation of serratus posterior superior?

anterior rami t2-t5

origin/insertion of serratus posterior inferior?

origin: spinous processes T11-L2

insertion: inferior border of ribs 9-12

innervation of serratus posterior inferior?

anterior rami T9-T12

action of serratus posterior inferior

depression of ribs during exhalation (...or does it?)

action of serratus posterior superior

elevation of ribs during inhalation

origin and insertion of levator scapulae?

origin: transverse processes C1-C4

Insertion: medial border of scapula

action of levator scapulae?

elevates the scapula!

innervation of levator scapulae?

Dorsal scapular nerve from C4 and C5.

origin and insertion of rhomboid minor

origin: nuchal ligament & spinous process C7-T1

insertion: spine process of scapula

origin and insertion of rhomboid major?

origin: spinous processes T2-T5

insertion: medial border of scapula

innervation of the rhomboids?

dorsal scapular nerves from C4 and C5

Innervation of Trapezius

Accessory nerve (CN XI), anterior rami of C3, C4

origin/insertion of superior fibres of the trapezius

origin: superior nuchal line, external occipital protuberance, nuchal ligament

insertion: lateral third of collar bone