Head, Neck Thorax, Spine, Abdomen OIAN Flashcards
SCM prox attach
sternal head: manubrium
clavicular head: upper medial 1/3 of clavicle
SCM distal attach
lateral surface of mastoid process & lateral 1/2 of superior nuchal line
SCM axn
bilateral: flex head against resistance, neck flexion, extension at AO joint, respiration
unilateral: ipsilateral sidebend, contralateral rotation
SCM innervation
CN XI motor
C2,3 sensory
anterior scalene prox attach
transverse process CV3-CV6
anterior scalene distal attach
1st rib
anterior scalene innervation
C4-C6 ventral rami
middle scalene prox attach
post tubercles transverse process CV5 -CV7
middle scalene distal attach
superior surface 1st rib
middle scalene innervation
ventral rami C3-C8
posterior scalene prox attach
posterior tubercles transverse processes CV5-CV7
posterior scalene distal attach
2nd rib
posterior scalene innervation
ventral rami C7,8
scalene action
ipsilateral sidebening of cervical vertebra
reverse axn: elevate 1st and 2nd rib during inspiration
levator scapulae prox attach
post tubercles of transverse processes CV1-CV4
levator scapulae distal attach
medial border of scap, at and above spine
levator scapulae innervation
C3,4 ventral rami
C5 from dorsal scapular n
levator scapulae axn
elevates scapula, downward rotation of scap with pec minor
temporalis prox attach
floor of temporal fossa and deep temporal fascia
temporalis distal attach
medial surface, apex, anterior & posterior borders of coronoid processes of mandible & anterior border of ramus of mandible
temporalis innervation
CN V
temporalis axn
anterior: elevation of mandible
posterior: retract mandible
masseter prox attach
inferior border and medial surface of the zygomatic arch
masseter distal attach
angle and lateral aspect of ramus of mandible
masseter innervation
mandibular branch (V3) of CN V
masseter axn
powerful elevator of mandible
lateral pterygoid prox attach
upper: infratemporal surface and crest of greater wing of sphenoid
lower: lateral surface of lateral pterygoid plate
lateral pterygoid distal attach
anterior aspect mandibular neck, articular capsule, & TMJ disc
lateral pterygoid innervation
mandibular branch of CN V
lateral pterygoid axn
chief protractor, depresses mandible
medial pterygoid prox attach
medial surface of lateral pterygoid plate & palatine bone & tuberosity of maxilla
medial pterygoid distal attach
medial surface of mandibular angle
medial pterygoid innervation
mandibular branch of CN V
medial pterygoid axn
elevate and protraction of mandible
external intercostals prox attach
lower margins of ribs 1-11
external intercostals distal attach
upper margins of ribs below
external intercostals innervation
corresponding intercostal n
external intercostals axn
elevates ribs
internal intercostals prox attach
lower margins of the ribs and costal cartilages & floor of costal groove
internal intercostals distal attach
upper margins of subadjacent ribs and costal cartilages
internal intercostals innervation
corresponding intercostal n
internal intercostals axn
depress rib
generally a muscle of expiration
innermost intercostals prox attach
internal aspects of adjoining ribs
innermost intercostals distal attach
upper margins of subadjacent ribs and costal cartilage, but fibers only at middle 1/3 of rib
innermost intercostals innervation
corresponding intercostal n
innermost intercostals axn
depress the rib
generally a muscle of expiration
external oblique prox attach
external surface of lower 8 ribs
external oblique distal attach
external lip of iliac crest, pubic tubercle, linea alba
external oblique innervation
thoracoabdominal n. (T7-T11) & subcostal
external oblique axn
increase intra-abdominal pressure
*R Sidebending: R IO and trunk flex
*L Rotation: R EO and L IO
internal oblique prox attach
thoracolumbar fascia, iliac crest, lateral 1/2 of inguinal ligament
internal oblique distal attach
up to lower 3 ribs & costal margins , linea alba and down towards pubis via conjoint tendon
internal oblique innervation
lower 2-3 thoracoabdominal n, subcostal n, L1 ventral ramus
internal oblique axn
increase intra-abdominal pressure
*R Sidebending: R IO and trunk flex
*L Rotation: R EO and L IO
transversus abdominus prox attach
fascia iliaca, iliac crest, thoracolumbar fascia, inner surfaces of lower 6 costal cartilages; lateral 1/3 of inguinal ligament
transversus abdominus distal attach
aponeurosis that contribute to rectus sheath and pubis via conjoint tendon
transversus abdominus innervation
thoracoabdominal n (T7-11), subcostal n, L1 ventral ramus
transversus abdominus axn
increase intra-abdominal pressure
rectus abdominus prox attach
xiphoid process of sternum & costal cartilages 5-7
rectus abdominus distal attach
pubic crest and symphysis
rectus abdominus inervation
thoracoabdominal n, subcostal n
rectus abdominus axn
increase intra-abdominal pressure
flex lumbar vertebral column if pelvis fixed
thorax fixed, flex vertebral column and draw pelvis up
diaphragm prox attach
sternal: posterior aspect of xiphoid process
costal: inner surfaces of lower 6 costal cartilages and lower 4 ribs
lumbar: bodies of upper lumbar vertebrae and fibrous arches (medial and lateral arcuate ligaments)
diaphragm distal attach
central tendon
diaphragm innervation
phrenic n
diaphragm axn
primary muscle of inspiration
contraction: diaphragm descends and draws central tendon down–> volume of thorax is increased and intrathoracic pressure is decreased
serratus posterior superior prox attach
nuchal ligament, spinous processes of CV7-TV3
serratus posterior superior distal attach
superior border of ribs 2-4
serratus posterior superior innervation
intercostal n T2-T5
serratus posterior superior axn
elevate ribs
serratus posterior inferior prox attach
spinous processes of TV11-LV2
serratus posterior inferior distal attach
inferior borders of ribs 8-12 near angles
serratus posterior inferior innervation
intercostal n T9-T11, subcostal n
serratus posterior inferior axn
depresses ribs
iliocostalis lumborum prox attach
median sacral crest, TV11-TV12, LV1 spines and ligaments; dorsal ilium; lateral aspect of sacral crest
iliocostalis lumborum distal attach
inferior borders of lower 6 or 7 costal angles
iliocostalis lumborum innervation
thoracic and lumbar dorsal rami
iliocostalis lumborum axn
extension and lateral flexion of vertebral column
iliocostalis thoracis prox attach
upper borders of lower costal angles
iliocostalis thoracis distal attach
superior borders of upper costal angles and back of CV7 transverse process
iliocostalis thoracis innervation
thoracic dorsal rami
iliocostalis thoracis axn
extension and lateral flexion of vertebral column
iliocostalis cervicis prox attach
3rd-6th costal angles
iliocostalis cervicis distal attach
posterior tubercles of CV4-CV6 transverse process
iliocostalis cervicis innervation
cervical dorsal rami
longissimus thoracis prox attach
common distal attach
longissimus thoracis distal attach
tips of all thoracic transverse processes and lower 9 or 10 ribs between tubercles and angles
longissimus thoracis innervation
thoracic dorsal rami
longissimus thoracis axn
extend and sidebend vertebral column
iliocostalis cervicis axn
extension and lateral flexion of vertebral column
longissimus cervicis prox attach
long tendons attached from TV1-TV4 or 5 transverse processes to tendons attached
longissimus cervicis distal attach
CV2-CV6 transverse process posterior tubercles
longissimus cervicis innervation
thoracic and cervical dorsal rami
longissimus cervicis axn
extend and sidebend vertebral column
longissimus capitis prox attach
tendons of TV1-TV4 or 5 transverse processes and lower 3 or 4 cervical articular processes
longissimus capitis distal attach
posterior margin of mastoid process
longissimus capitis innervation
thoracic and cervical dorsal rami
longissimus capitis axn
extend the head and rotate the face to the same side
spinalis thoracis prox attach
TV11-LV2 spines
spinalis thoracis distal attach
TV4-TV8 spines
spinalis thoracis innervation
thoracic and cervical dorsal rami
spinalis thoracis axn
extend vertebral column
spinalis cervicis prox attach
lower ligamentum nuchae, CV7 spine
spinalis cervicis distal attach
spine of CV2
spinalis cervicis innervation
cervical dorsal rami
spinalis cervicis axn
inconsistant, extend vertebral column
spinalis capitis prox attach
blended with semispinalis capitis
spinalis capitis innervation
cervical dorsal rami
spinalis capitis axn
extend vertebral column
quadratus lumborum prox attach
medial 1/2 of inferior border of rib 12 and tips of lumbar transverse processes
quadratus lumborum distal attach
iliolumbar ligament and internal lip of iliac crest
quadratus lumborum innervation
ventral rami T12, L1-4
quadratus lumborum axn
ipsilateral elevation of pelvis (hip hiker), ipsilateral sidebending of vertebral column
bilateral: assist in lumbar extension
psoas major prox attach
transverse processes of all lumbar vertebrae; lateral aspect of bodies of TV12 and lumbar vertebrae, and disc in between
psoas major distal attach
lesser trochanter
psoas major innervation
ventral rami L2-L4
psoas major axn
flexes hip joint, sidebending of lumbar vertebrae if LE is fixed; flexes trunk if pelvis is fixed
psoas minor prox attach
lateral aspect of TV12-LV1 ad discs in between
psoas minor distal attach
pectineal line and ilipectineal eminence
psoas minor innervation
ventral rami L1 and L2
psoas minor axn
assists in hip flexion and stabilization (does not cross hip)
iliacus prox attach
iliac crest, iliac fossa, ala of sacrum, and anterior SI ligaments
iliacus distal attach
tendon of psoas major, lesser trochanter and femur just distal
iliacus innervation
femeral n, L2, L3
iliacus axn
flexes the hip with the psoas major
stabilizes the hip