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02 - Axial - Cervical Spine > Muscles > Flashcards

Flashcards in Muscles Deck (14)
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1

Sternocleidomastoid

> P: long strap-like muscle around the side of the neck (+forms anterior border of posterior triangle of neck)
> O: Sternal head = anterior manubrium
: Clavicular head = superior aspect of medial 1/3 of clavicle
> I: Lateral 1/3 of superior nuchal line
: mastoid process
> A: bilateral flexion (+accessory muscle of respiration)
: ipsilateral side flexion
: contralateral rotation

2

Longus Capitis

> O: Anterior TP of C3-6
> I: Anterior occipital bone
> A: Bilateral flexion of head + neck
: Ipsilateral side flexion of head + neck

3

Suboccipital flexors

> Rectus capitis lateralis and anterior
(lateral masses of C1 to occiput)
> A: Bilateral flexion
: ipsilateral side flexion

4

Longus Colli

> Anterior bodies of T3-C2 + anterior tubercle of C1 to + TPs of C6-C3
> A: bilateral flexion of neck
: ipsilateral side flexion

5

Scaleni

> Ant: TP of C3-C6 to rib 1
> Mid: TP of C1-C7 to rib 1
> Post: TP of C4-C6 to rib 2
> A: Bilateral cervical flexion
: Ipsilateral side flexion
: anterior and posterior contralateral rotation
* Thoracic outlet between anterior and middle

6

Trapezius

> O: Medial 1/3 of superior nuchal line + external occipital protuberance
: Ligamentum nuchae
: SP of C7-T12 incl. supraspinous ligs
> I: Lateral 1/3 of clavicle (upper fibres only)
> A: Bilateral extension of head + neck
: Ipsilateral side flexion
+ shoulder girdle elevation + lateral rotation

7

Splenius Capitis

> O: Ligamentum nuchae
: SP of C7-T3
> I: Mastoid process
: Occiput
: superior nuchal line
> A: Bilateral extension of head + neck (powerful)

8

Semispinalis Capitis

> O: TP of T6-C7
> I: Occiput
> A: Bilateral extension of head + neck
: Ipsilateral side flexion
+ stability role

9

Erector Spinae

> Iliocostalis Cervicis
- Rib angles of 6-3 to TP of C6-4
> Longissimus Cervicis
- TP of T5-T1 to TP of C6-C2
> Longissimus Capitis
- TP of T5-C4 to mastoid process
> Spinalis Cervicis (absent in most)
- C7 + Lower ligamentum nuchae to SP of C2
> Spinalis Capitis
- blends with semispinalis capitis

> A: Bilateral extension of head + neck
: Ipsilateral side flexion

10

Suboccipital extensors

> Rectus capitis posterior major + minor
> obliqus capitis superior + inferior

11

Levator Scapulae

> O: TP of C1-4
> I: medial border of scapulae between superior angle and medial spine of scapula
> A: bilateral extension of neck
: ipsilateral side flexion of neck
+ elevation of scapula (functionally stabilise scapulae + resist depression when carrying weight)

12

Splenius cervicis

> SP of T6-T3 to TP of C3-C1
> Bilateral extension of neck
> Ipsilateral side flexion
> Contralateral rotation

13

Semispinalis Cervicis

> Tp of T6-1 to SP of C5-C1
> Bilateral neck extension
> Ipsilateral side flexion
+ stability function

14

Fixators

> Multifidus
> intertransversarii
> interspinales
> rotatores
a.k.a - Transversospinalis muscles