OCTH 511 PRACTICAL ONE

trapezius origin(s)

superior nuchal line, external occipital protuberance, ligamentum nuchae, SP of C7-T12

trapezius insertion(s)

clavicle, acromion, spine of scapula

trapezius innervation(s)

spinal accessory nerve, ventral ramus

trapezius action(s)

upper fibers: elevate scapula

middle fibers: retract scapula

lower fibers: depress scapula

all fibers/bilaterally: extend head/neck

latissimus dorsi origin(s)

inferior angle of scapula, SP of last 6 thoracic vertebrae, last 3/4 ribs, thoracolumbar fascia, posterior iliac crest

latissimus dorsi insertion

intertubercular groove of humerus

latissimus dorsi innervation

thoracodorsal nerve

latissimus dorsi action(s)

extend, adduct, medially rotate the shoulder

rhomboid minor origin

nuchal ligament, SP of C7 & T1

rhomboid major origin

SP of T2-T5

rhomboid major & minor insertion

medial border of scapula (spine to inferior angle)

rhomboid major & minor innervation

dorsal scapular nerve

rhomboid major & minor action(s)

adduct, elevate, downwardly rotate the scapula

levator scapulae origin

posterior tubercles of C1-C4 TP

levator scapulae insertion(s)

superior medial border of scapula

levator scapulae innervation

dorsal scapular nerve & cervical nerves

levator scapulae action(s)

elevate & downwardly rotate scapula, laterally flex head/neck, some cervical rotation

bilaterally: extend head/neck

serratus posterior superior origin

ligamentum nuchae, SP of C7-T3

serratus posterior superior insertion

superior borders of ribs 2-4

serratus posterior superior innervation

2nd to 5th intercostal nerves

serratus posterior superior action

elevate ribs

serratus posterior inferior origin

SP of T11-L2

serratus posterior inferior insertion

inferior borders of ribs 8-12

serratus posterior inferior innervation

ventral rami of thoracis spinal nerves

serratus posterior inferior action

depress ribs

splenius capitis origin

ligamentum nuchae, SP of C7-T6

splenius capitis insertion(s)

mastoid process/superior nuchal line of occipital bone

splenius capitis innervation

dorsal rami of spinal nerves

splenius capitis action(s)

ipsilateral lateral flexion/rotation

bilaterally: extend head/neck

splenius cervicis origin

ligamentum nuchae, SP of C7-T6

splenius cervicis insertion

tubercles of C1-C3/4 TP

splenius cervicis innervation

dorsal rami of spinal nerves

erector spinae origin

tendon from posterior iliac crest, posterior sacrum, inferior lumbar SP, supraspinous ligament

erector spinae insertion(s)

various spots on posterior ribs, transverse & spinous processes of C2-T12, mastoid process

erector spinae innervation

spinal nerves

erector spinae action(s)

ipsilateral lateral flexion of vertebral column

bilaterally: extend head/neck

platysma origin

inferior border of mandible, skin/cutaneous tissue of lower face

platysma insertion

fascia of pec major & deltoid

platysma innervation

cervical branch of facial nerve

platysma action

draw down corners of mouth

SCM origin(s)

sternal head: top of manubrium

clavicular head: medial 1/3 of clavicle

SCM insertion

temporal mastoid process, lateral superior nuchal line

SCM innervation

spinal accessory nerve

SCM action(s)

ipsilateral lateral head/neck flexion, contralateral head/neck rotation

bilaterally: neck flexion, helps to elevate ribs during inhalation

pec major origin

clavicle, sternum, cartilage of ribs 1-6

pec major insertion

greater tubercle of humerus

pec major innervation(s)

clavicular: lateral pectoral

sternocostal: lateral and medial pectoral

pec major action(s)

adduct & internally rotate the shoulder

clavicular fibers: flex & horizontally adduct shoulder

sternocostal fibers: extend the shoulder

pec minor origin

ribs 3-5

pec minor insertion

coracoid process of scapula

pec minor innervation

medial pectoral

pec minor action(s)

depress, abduct, downwardly rotate scapula

fixed scapula: elevate the thorax

subclavius origin

junction of 1st rib and costal cartilage

subclavius insertion

inferior surface of clavicle

subclavius innervation

subclavion nerve

subclavius action

stabilize clavicle during arm movement

intercostal muscles origin

inferior border of rib above

intercostal muscles insertion

superior border of rib below

intercostal muscles innervation

intercostal nerve

intercostal muscles action(s)

internal: draw ribs inferior to help with exhale

external: draw ribs superior to help with inhale

serratus anterior origin

external surfaces of upper 8/9 ribs

serratus anterior insertion

anterior surface of scapula

serratus anterior innervation

long thoracic nerve

serratus anterior action(s)

abduct, upwardly rotate, hold scapula against thoracic wall

external oblique origin

external surfaces of ribs 5-12

external oblique insertion

anterior iliac crest, rectus sheath to linea alba

external oblique innervation

ventral rami

external oblique action(s)

ipsilateral lateral flexion, contralateral rotation

bilaterally: flexion of vertebral column, compression of abdomen

internal oblique origin

lateral inguinal ligament, iliac crest, thoracolumbar fascia

internal oblique insertion

lower 3 ribs, rectus sheath to linea alba

internal oblique innervation

ventral rami, iliohypogastic, ilioinguinal

internal oblique action(s)

ipsilateral lateral flexion, ipsilateral rotation

bilaterally: flexion of vertebral column, compression of abdomen

transverse abdominal origin

lateral inguinal ligament, iliac crest, thoracolumbar fascia, lower 6 ribs

transverse abdominal insertion

rectus sheath to linea alba

transverse abdominal innervation

ventral rami, iliohypogastric, ilioinguinal

transverse abdominal action

compress abdomen

rectus abdominis origin

pubic crest & symphysis

rectus abdominis insertion

cartilage of ribs 5-7, xiphoid process

rectus abdominis innervation

ventral rami

rectus abdominis action(s)

flex spine, posterior pelvic tilt

diaphragm origin

sternal: inner xiphoid process

costal: lower 6 ribs

lumbar: upper 2/3 lumbar vertebrae

diaphragm insertion

central tendon

diaphragm innervation

phrenic nerve

diaphragm action

inspiration

psoas major origin

bodies/TP of lumbar vertebrae

psoas major insertion

lesser trochanter of femur

psoas major innervation

lumbar plexus

psoas major action(s)

flex/external rotation of hip, flex trunk, anterior pelvic tilt

unilaterally: some lateral flexion

psoas minor origin

T12-L1 vertebrae/discs

psoas minor insertion

pectineal line, iliopectineal eminicies

psoas minor innervation

anterior rami of lumbar nerve

psoas minor action

weak trunk flexion, pelvic stabilization

iliacus origin

iliac fossa

iliacus insertion

tendon on psoas major

iliacus innervation

femoral nerve

ilacus action(s)

flexion & lateral rotation of hip, flexion of trunk, anterior pelvic tilt

quadratus lumborum origin

posterior iliac crest

quadratus lumborum insertion

rib 12, TP of L1-L4

quadratus lumborum innervation

anterior branches of T12/L1-L4

quadratus lumborum action(s)

lateral pelvic tilt, ipsilateral trunk flexion, some vertebral extension

bilaterally: fix rib 12