7) Cervical Spine Myology Flashcards
Sternomastoid or Sternoleidomastoid
O: x2 heads
Sternal head: ant surface of manubrium
Clavicular head: upper surface medial 1/3 clavicle
I: mastoid process and lateral 2/3 superior nuchae line
A:
unilaterally: ipsalateral lateral flexion contralateral rotation
Bilaterally: flexes neck
F: (r) looking to the left
NS: cranial accessory nerve XI anterior primary rami C2/3
Anterior Scalenes
O: TP C3-6
I: scalenes tubercle, inner border 1st rib
A:
Unilaterally: ipsalateral lateral flexion of neck
Bilaterally: flex neck
NS: anterior primary rami C4-6
Middle scalenes
O: TP C1-7
I: upper surface 1st rib
A:
Unilaterally: ipsalateral lateral flexion of neck
Bilaterally: flex neck
NS: anterior primary rami C3-8
Posterior scalenes
O: TP C4-6
I: outer surface 2nd rib
A: Unilaterally: ipsalateral neck flexion
NS: anterior primary rami C6-8
Longus coli info
Lies deep to the superficial muscles of the neck on the anterolateral aspect of the cervical and upper thoracic vertebrae
Helps to form a muscular sleeve
Superficial fibres extend over 2 or 3 segmental levels
Deeper fibres extend over 1
Arrangement ensures that normal muscle tone provides segmental stability durning static postures of the head
During active flexion all fibres contract together to produce flexion segmentally while the global muscles produce the movement
Longus coli lower
O: T1-3
I: TP of C5/6
A: segmental flexion of cervical spine
NS: anterior rami C3-6
Longus coli middle
O: bodies C5-T3
I: bodies C2-4
A: segmental flexion of cervical spine
NS: anterior rami C3-6
Longus coli upper
O: TP C3-5
I: Anterior tubercle of atlas
A: segmental flexion of cervical spine
NS: anterior rami C3-6
What is the combined action of longus coli
Bilateral Flexion of the cervical spine
Unilateral lateral flexion
Works with sternocledomastoid
Erector spinae
Iliocostalis cervicis
Longissimus cervicis
Longissimus capitis
Spinalis cervicis
Spinalis capitis
Iliocostalis cervicis
O: angles ribs 3-7
I: TP C4-7
A: extension lateral flexion
NS: dorsal primary divisions of spinal nerves
Longissimus cervicis
O: TP T1-6
I: TP C2-6 Posterior tubs
A: extension cervical spine lateral flexion
NS: dorsal primary divisions of spinal nerves
Longissimus capitus
O: TP T1-5 articular process C5-7
I: posterior aspect of mastoid process
A: extension cervical spine and ipsalteral rotation
NS: dorsal primary divisions of spinal nerves
Spinalis cervicis
O: ligamentum nuchae C7 SP
I: SP of axis C2
A: extension cervical spine
NS: dorsal primary divisions of spinal nerves
Spinalis capitis or Semispinalis capitis
O: TP T1-6 articular process of C4-7
I: medial impression between superior and inferior nuchae lines on the base of skull
A: extension cervical spine contralateral rotation
NS: dorsal primary divisions of spinal nerves
