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