Back - origin, insertion, innervation, action Flashcards
Insertion for trapezius
lateral third of clavicle
acromion
scapular spine
Innveration of trapezius
Accessory nerve (CN XI) C3-C4 cervical plexus
Actions of trapezius
Evelvates scapula obliquely Rotates glenoid cavity superiorly Tilts head ipsilaterally Rotates head contralaterally Retracts scapula medially Depresses scapula
Origin of latissimus dorsi
spinous process of t7-t12 thoracolumbar fascia inferior angle of scapula 9-12th ribs iliac crest
Insertion of latissimus dorsi
floor of intertubercular sulcus of humerus
innervation of latissimus dorsi
thoracodorsal nerve c6-c8
actions of latissimuss dorsi
internal rotation
adduction
extension
respiration-cough muscle
origin of rhomboid major
spinous process of t2-t5
insertion of rhomboid major
medial border of scapula below scapular spine
innervation of rhomboid major
dorsalscapular nerve c4-c5
actions of rhomboid major
steadies scapula
elevates medially
origin of rhomboid minor
spinous process of c7-t1
insertion of rhomboid minor
medial border above scapular spine
innervation of rhomboid minor
dorsalscapular nerve c4-c5
actions of rhomboid minor
steadies scapula
Elevates medially
origin of levator scapular
transverse process of c1-c4
insertion of levator scapula
superior angle of scapula
innervation of levator scapula
dorsalscapular nerve c4-c5
levator scapular action
Raises scapula medially while moving inferior angle medially
inclines neck ilpsilaterally
origin serratus posterior superior
nuchal ligament
c7-t3 spinous process
insertion of serratus posterior superior
2-4th ribs superior border of ribs
innervation of serratus posterior superior
spinal nerve t2-t5 anterior rami
action of serratus posterior superior
elevates ribs
origin of serratus posterior inferior
t11-L2 spinous process
insertion of serratus posterior inferior
8th-12th ribs inferior border near angles
innveration of serratus posterior inferior
spinal nerve t9-t12 anterior rami
actions of serratus posterior inferior
depresses ribs
what makes up the erector spinae
iliocostalis, longissimus, and spinalis
origin of iliocostalis cervicis
3rd-7th ribs
insertion of iliocostalis cervicis
c4-c6 transverse process
innervation of iliocostalis cervicis
spinal nerve c8-L1
action of iliocostalis cervicis
bilaterally-extends spine
unilaterally-bends spine laterally ipsilaterally
origin of iliocostalis thoracis
7th-12th ribs
insertion of iliocostalis thoracis
1st-6th ribs
innervation of iliocostalis thoracis
spinal nerve of c8-L1
action of ilicostalis thoracis
bilaterally-extends spine
unilaterally-bends spine laterally to the same side
origin of iliocostalis lumborum
sacrum, iliac crest, thoracolumbar fascia
insertion of iliocostalis lumborum
6th-12th ribs
thoracolubar fascia
upper lumbar vertebrae transverse processes
innervation of iliocostalis lumborum
spinal nerves c8-L1
actions of iliocostalis lumborum
bilaterally-extends spine
unilaterally-bends spine laterally ipsilaterally
Origin of trapezius
external occipital protuberance
nuchal ligament
T5-T12 spinous processes
Medial superior nuchal line
origin of longissimus capitis
transverse process and articular process of c4-c7
transverse process of t1-t3
insertion of longissimus capitis
temporal bone-mastoid process
innervation on longissimus capitis
spinal nerve c1-L5
action of longissimus capitis
bilat-flexes head
unilat-flexes and rotates head ipsilaterally
origin of longissimus thoracis
sacrum
iliac crest
spinous process of lumbar vertebra
transverse process of lower thoracic vertebra
innervation of longissimus thoracis
spinal nerve c1-L5
action of longissimus thoracis
bilat-extends spine
unilat-bends spine laterally ipsilaterally
origin of spinalis cervicis
spinous process of c5-t2
insertion of spinalis cervicis
c2-c5 spinous process
Innveration of spinalis cervicis
spinal nerve posterior rami
action of spinalis cervicis
bilat-extends cervical and thoracic spine
unilat-bends cervical and thoracic spine ipsilaterally
origin of spinalis thoracis
t10-L3
insertion of spinalis thoracis
t2-t8 spinous process lateral surface
innervation of spinalis thoracis
spinal nerve posterior rami
action of spinalis thoracis
bilat-extends cervical and thoracic spine
unilat-bends cervical and thoracic spine ipsilaterally
origin of splenius capitis
nuchal ligament
c3-c7 spinous process
insertion of splenius capitis
lateral superior nuchal line
mastoid process
innervation of splenius capitis
spinal nerve c1-c6 post rami, lat branches
action of splenius capitis
bilat-extends cervical spine and head
unilat-flexes and rotates head ipsilaterally
origins of splenius cervicis
spinous process t3-t6
insertion of splenius cervicis
transverse process c1-c2
innervation of splenius cervicis
spinal nerve c1-c6 post rami, lat branch
action of splenius cervicis
bilat- extends cervical spine and head
unilat-flexes and rotates head ipsilaterally
origin of semispinalis capitis
transverse and articular process of c4-c7
insertion of semispinalis capitis
btwn superior and inferior nuchal lines
innervation of semispinalis capitis
spinal nerve post rami
action of semispinalis
bilat-extends thoracic and cervical spine and head
stabilizes craniovertebral joints
unilat-bends head, cervical and thoracic spines to same side, rotates to opposite side
origin of semispinalis cervicis
transverse process of t1-t6
insertion of semispinalis cervicis
spinous process of c2-c5
innervation of semispinalis cervicis
spinal nerve, post rami
action of semispinalis cervicis
bilat-extends thoracic and cervical spine and head
stabilizes craniovertebral joints
unilat-bends head, cervical and thoracic spines to same side, rotates to opposite side
origin and insertion of multifidus
c2-sacrum btwn transverse and spinous process, skipping 2-4 vertebrae
innervation of multifidus
spinal nerve posterior rami
action of multifidus
bilat-extends spine
unilat-flexes spine to same side, rotates to opposite side
origin and insertion of rotatores breves
t1-t12 btwn transverse and articular process of adjacent vertebra
innervation of rotatores breves
spinal nerve, posterior rami
action of rotatores breves
bilat-extends thoracic spine
unilat-rotates spine to opposite side
origin and insertion of rotatores longi
t1-t12 btwn transervse and spinous process, skipping one vertebra
innervation of rotatores longi
spinal nerve, posterior rami
action of rotatores longi
bilat-extends thoracic spine
unilat-rotates spine to opposite side
origin of obliquus capitis inferior
spinous process c2
insertion of obliquus capitis inferior
transverse process of c1
innervation of obliquus capitis inferior
C1 posterior rami suboccipital nerve
origin of obliquus capitis superior
c1 transverse process
insertion of obliquus capitis superior
middle 1/3 of inferior nuchal line
above rectus capitis posterior major
innervation of obliquus capitis superior
c1 posterior rami=suboccipital nerve
action of obliquus capitis superior
bilat-extends head
unilat-tilts head to same side and rotates head to opposite side
origin of rectus capitis posterior major
spinous process of c2
insertion of rectus capitis posterior major
middle 1/3 of inferior nuchal line
innervation of rectus capitis posterior major
c1 posterior rami=suboccipital nerve
action of rectus capitis posterior major
bilat-extends head
unilat-rotates head to the same side
origin of rectus capitis posterior minor
c1 posterior tubercle
insertion of rectus capitis posterior minor
inner 1/3 of inferior nuchal line
innervation of rectus capitis posterior minor
c1 posterior rami=suboccipital nervse
action of rectus capitis posterior minor
bilat-extends head
unilat-rotates head to same side
origin of sternocleidomastiod
sternum and medial 1/3 of clavicle
innervation of sternocleidomastiod
motor-accessory nerve (CN XI)
pain-cervical plexus c2,c3
action of sternocleidomastiod
unilat-tilts head to same side, rotates head to opposite side
bilat-extends head, aids in respiration when head is fixed
origin of anterior scalene
anterior tubercles or transverse process of c3-c6
insertion of anterior scalene
scalene tubercle of 1st rib
innervation of anterior scalene
direction branches from cervical and brachial plexus c3-c8
action of anterior scalene
mobile ribs-elevates upper ribs during forced inspiration
fixed ribs-bends cervical spine to same side, flexes neck bilaterally
origin of middle scalene
transverse process of c1-c2
posterior tubercles of transverse process c3-c7
insertion of middle scalene
1st rib posterior to groove for subclavian artery
innervation of middle scalene
direct branches from cervical and brachial plexuses c3-c8
actions of middle scalene
mobile ribs-elevate upper ribs during forced inspiration
fixed ribs-bends cervical spine to same side unilaterally and flexes neck bilaterally
origin of posterior scalene
posterior tubercles of transverse process of c5-c7
insertion of posterior scalene
2nd rib outer surface
innervation of posterior scalene
direct branches from cervical and brachial plexuses c3-c8
action of posterior scalene
mobile ribs-elevate upper ribs during forced inspiration
fixed ribs-bends cervical spine to same side unilaterally and flexes neck bilaterally
Actions of obliquus capitis inferior
bilat-extends head
unilat-rotates head to same side