Cervical muscles Flashcards
Anterior scalene
O: anterior tubercles of transverse processes of C4-6
I: 1st rib
A: elevation of 1st rib, ipsilateral side bending contralateral rotation
In: C4-6 nerve roots
Sternocleidomastoid
O:Tendinous head from sternum; muscular head from medial 1/3 of clavicle
I: Mastoid process of the skull
A: unilateral activation- ipsilateral lateral flexion of the neck and contralateral rotation of the head; bilateral activation- flexion of the head
INN: accessory nerve (CN XI) C2-3 pain and proprioception
Middle scalene
O: Transverse process of C2-7
I: 1st rib
A: elevation of 1st rib, ipsilateral side bending, contralateral rotation
INN: Ventral rami of C3-8
Posterior Scalene
O: Transverse process of C5-6
I:2nd rib
A: elevation of 2nd rib, ipsilateral side bending, contralateral rotation
INN: Ventral Rami of C3-8
Platysma
O: Inferior Mandible
I: fascia of pectorals major and deltoid
A: Draws skin or neck superiorly with clenched jaw, draws corners of mouth inferiorly
IN: cervical branch of fascial nerve
Splenius Capitis
O: Lagamentum Nuchae; spinous process of C7-T3/4
I: Mastoid process and occipital bone
A: Unilateral action- ipsilateral rotation of head and neck; bilateral action- extension of head and neck
IN: dorsal rami of middle cervical spinal nerves
Splenius Cervicis
O: spinous processes of T3-6
I: transverse processes of upper 2-4 cervical vertebrae
A: Unilateral action- Ipsilateral rotation of head and neck; bilateral action- extension of head and neck
IN: Dorsal rami of lower cervical spinal nerves
Serratus posterior superior
O: Ligamentum nuchae; spinous process of C7-T2/3
I: upper ribs
A: elevation of ribs
IN: ventral rami of upper 3-4 thoracic spinal nerves
Serratus posterior inferior
O: spinous process of T11-L2
I: lower 3-4 ribs
A: pulls lower ribs inferiorly
IN: Ventral rami of lower thoraces (9th-12th) spinal nerves
Iliocostalis Lumborum
O: iliac crest; sacrum
I: lower boarders of lower 6-7 ribs
A: Bilateral- extension of spinal column; Unilateral- ipsilateral side bending
IN: dorsal rami of spinal nerves in area of muscles
Iliocostalis Thoracics
O: upper boarders of lower 6-7 ribs
I: Lower boarders of upper 6 ribs
A: Bilateral- extension of spinal column; Unilateral- ipsilateral side bending
IN: dorsal rami of spinal nerves in area of muscles
Iliocostalis Cervicis
O: angles of upper 6 ribs
I: transverse processes of C4-6
A: Bilateral- extension of spinal column; Unilateral- ipsilateral side bending
IN: dorsal rami of spinal nerves in area of muscles
Longissimus thoracis
O: intermediate part of common tendon
I: Lower 9-10 ribs and adjacent transverse processes of vertebrae
A: Bilateral- extension of spinal column; Unilateral- ipsilateral side bending
IN: dorsal rami of spinal nerves in area of muscles
Longissimus cervicis
O: transverse processes of upper 4-6 thoracic vertebrae
I: transverse processes of C2-6 vertebrae
A: Bilateral- extension of spinal column; Unilateral- ipsilateral side bending
IN: dorsal rami of spinal nerves in area of muscles
Longissimus capitis
O: tendons of origin of longissimus cervicis; articular processes of C4-7
I: Mastoid process
A: Bilateral- extension of spinal column; Unilateral- ipsilateral side bending
IN: dorsal rami of spinal nerves in area of muscles