axial muscles and function Flashcards
Frontalis
action, origin, insertion, innervation
raise eyebrows, aponeurosis, skin eyebrows, facial
occipitalis
action, origin, insertion, innervation
moves scalp posteriorly, occipital bone, aponeurosis, facial
orbicularis oculi
action, origin, insertion, innervation
closes eyelids, frontal and maxillary bone, skin of eyelid, facial
risorius
action, origin, insertion, innervation
draws corner of lips laterally, fascia of masseter, skin at angle of the mouth, facial
orbicularis oris
action, origin, insertion, innervation
close lips, maxilla, and mandible, skin of mouth, facial
zygomaticus major & minor
action, origin, insertion, innervation
elevated corner of the mouth, zygomatic bone, skin and muscle at corner of mouth, facial
buccinator
action, origin, insertion, innervation
compresses cheek and pulls mouth laterally, molar region of mandible and maxilla, orbicularis oris, facial
depressor labii inferioris
action, origin, insertion, innervation
draws lower lip inferiorly, body of mandible lateral to midline, skin and muscle of lower lip, facial
levator labii superioris
action, origin, insertion, innervation
draws upper lip up, zygomatic bone, skin and muscle of upper lip, facial
depressor anguli oris
action, origin, insertion, innervation
draws corner of mouth down and lateral, body of mandible below incisors, skin and muscle at angle of mouth, facial
mentalis
action, origin, insertion, innervation
protrudes lower lip and wrinkles chin, anterior body of mandible, skin of chin, trigeminal
masseter
action, origin, insertion, innervation
elevate mandible, zygomatic arch and maxilla, angle and ramus of mandible, trigeminal
temporalis
elevate and retract mandible, temporal fossa, coronoid process of mandible, trigeminal
platysma
action, origin, insertion, innervation
depress mandible | tense skin of neck, fascia of chest, lower margin of mandible, skin, muscle at corner of mouth, facial
sternocleidomastoid
action, origin, insertion, innervation
flex and rotate neck and rotate head toward opposite side, manubrium and clavicle, mastoid process of temporal bone, accessory
scalene
action, origin, insertion, innervation
flex and rotate neck | elevate ribs, transverse process of cervical vertebrae, ribs 1 and 2, cervical & brachial plexus
Digastrics anterior & posterior
action, origin, insertion, innervation
elevate and retract hyoid,
Anterior: lower inner margin of mandible
posterior: mastoid process
hyoid, facials
stylohyoid
action, origin, insertion, innervation
elevates and retracts hyoid, styloid process of temporal bone, hyoid bone, facial
mylohyoid
action, origin, insertion, innervation
elevates hyoid bone during swallowing, inner surface of the mandible, hyoid bone, trigeminal
sternohyoid
action, origin, insertion, innervation
depress larynx & hyoid bone, manubrium and clavicle, hyoid bone, C1-C3
levator scapulae
action, origin, insertion, innervation
elevate and adducts scapula, transverse process of C1-C4, scapula medial border above spine, C3-4 ad dorsal scapula
pectoralis minor
action, origin, insertion, innervation
elevates upper ribs and moves scapula forward, ribs 3-5, coracoid process, pectoral
serratus anterior
action, origin, insertion, innervation
move scapula forward and rotate scapula laterally, lateral aspect of ribs 1-8, medial border of the scapula, long thoracic
external intercostals
action, origin, insertion, innervation
elevate rib cage and aid in inspiration, inferior border of rib above, superior border of rib below, intercostal
internal intercostal
action, origin, insertion, innervation
depress rib cage and aid in expiration, superior border of rib below, inferior border of rib above, intercostal
diaphragm
action, origin, insertion, innervation
prime mover of inspiration and flatten when contract and lengthens thoracic cavity, no origin or insertion, phrenic
rectus abdominis
action, origin, insertion, innervation
flex and rotate vertebral column,
pubic crest and symphysis,
xiphoid process and cartilages of ribs 5-7,
intercostal
external oblique
action, origin, insertion, innervation
trunk rotation and lateral flexion compress abdomen and depress ribs,
anterior surface of ribs 5-12,
pubic crest, pubic tubercle, iliac crest, linea alba,
intercostal iliohypogastric
internal oblique
action, origin, insertion, innervation
trunk rotation and lateral flexion compress abdomen and depress ribs,
iliac crest, inguinal ligament, lumbar fascia,
linea alba, ribs 9-12 (cartilage), pubic crest
intercostal, iliohypogastric, ilioinguinal
transversus abdominis
action, origin, insertion, innervation
compress abdomen,
iliac crest, cartilages of ribs 6-12, inguinal ligament,
pubic crest, linea alba,
intercostal, iliohypogastric, ilioinguinal
trapezius
action, origin, insertion, innervation
extends neck,
occipital bone, spine of C7,
acromion and spine of scapula,
accessory
latissimus dorsi
action, origin, insertion, innervation
extene, adduct, medially rotate arm,
T5-L6 spinous processes, ribs 8-12, iliac crest
intertubercular groove of humerus,
thoracodorsal
erector spinae (longissimus, iliocostalis, spinalis) action, origin, insertion, innervation
as a pair: extends neck and vertebral column
single: bends vertebrae lateral
transverse process of C7-T12,
occipital bone and spinous process of cervical vertebrae
