Prevertebral Muscles Of The Neck Flashcards
Name the anterior prevertebral muscles of the neck (4)
Longus colli
Longus capitis
Anterior scalene
Rectus capitis anterior
Name the pre vertebral muscles of the neck (9)
Longus colli Longus capitis Rectus capitis anterior Rectus capitis lateralis Anterior scalenes Middle scalenes Posterior scalenes Splenius capitis Levator scapulae
Name the lateral prevertebral muscles of the neck (5)
Rectus capitis lateralis Splenius capitis Levator scapulae Middle scalene Posterior scalene
Superior and inferior attachments of longus colli
S: anterior tubercle of C1 , bodies of C1-3 and transverse processes of C3-C6
I: bodies of C5-T3 vertebrae and transverse processes of C3-C5 vertebrae
Innervation of longus colli
Anterior rami of c2-c6 spinal nerves
Main action of longus colli
Flexes neck with rotation (torsion) to opposite side if acting unilaterally
Superior and inferior attachments of longus capitis
S: Base part of occipital bone
I: anterior tubercle of c3-c6 transverse processes
Innervation of longus capitis
Anterior rami of c1- c3 spinal nerves
Action longus capitis
Flexes head
Rectus capitis anterior superior and inferior attachments
S: base of cranium
I: anterior surface of lateral mass of C1 and transverse process
Innervation of rectus capitis anterior
C1 and C2 spinal nerves
Action of rectus capitis anterior
Flexes head
Superior and inferior attachment of anterior scalene
S: transverse processes of C3-C6 vertebrae
I: 1st rib
Innervation of anterior scalene
Cervical spinal nerves C4-C6
Action of anterior scalene
Flexes head
Name the lateral prevertable muscles
Rectus capitis lateralis Splenius capitis Levator scapulae Middle scalene Posterior scalene
Superior and inferior attachments of rectus capitis lateralis
S: jugular process of occipital bone
I: transverse process of C1
Innervation of rectus capitis lateralis
C1 -2 spinal nerves
Main action of rectus capitis lateralis
Flexes head and helps stabilise it
Splenius capitis superior and inferior attachments
Origin: inferior half of Nuchal ligament and spinous processes of superior 6 thoracic vertebrae
Insertion: lateral aspect of mastoid process and lateral 3rd of superior Nuchal line
Innervation of splenius capitis
Posterior rami of middle Cervicle spinal nerves
Action of splenius capitis
Laterally flexes and rotates head and neck to same side,acting bilaterally- extends had and neck
Superior and inferior attachments of levator scapulae
S: posterior tubercles of transverse processes of C1-C4 vertebrae
I: superior medial border of scapula
Innervation of levator scapulae
Dorsal Scapular nerve C5 and cervical spinal nerves C3 and C4
Action of levator scapulae
Downwards rotation of scapula and tilts it’s glenoid cavity by rotating scapula.
superior attachments of middle and posterior scalene
Posterior tubercles of transverse processes of C3-C7
Inferior attachment of middle scalene and posterior scalene
Middle scalene- superior surface of 1st ribs
Posterior scalene- external border of 2nd ribs
Innervation of middle scalenes
Cervical spinal nerves (anterior rami)
Action of middle and posterior scalene
Middle- flexes neck laterally; elevates 1st rib during active respiration
Posterior scalene- fleeces neck laterally and elevates 2nd rib during active respiration
Innervation of posterior scalene
Anterior rami of spinal nerves C7 and C8
