Origin and Insertion Flashcards
Muscle mechanics
What is the origin and insertion of the frontal is muscle? Action?
Origin: Cranial Aponeurosis
Insertion: skin of eyebrows
Action: raise eyebrows
Orbicularis oculi origin and insertion action
O: Frontal bone and maxilla
I: Skin and Muscle around mouth
A: Blink/close eyes
Orbicularis Oris
O: Mandible and Maxila
I: Skin and muscle around mouth
A: closes and protrudes lips
Temporalis and Masseter
O: Temporal Bone
I: Mandible
A: closes jaw
Zygomaticus
O: Zygomatic bone
I: skin and muscle at corner of lips
A: raises corner of mouth (smile)
Buccinator
O: Maxilla and mandible near molars
I:Orbicularis oris
A: compresses cheek (sucking), holds food between teeth during chewing
Sternocleidomastoid
O: sternum and clavicle
I: Mastoid proces and temporal bone
A:Flexes neck; laterally rotates head
Platysma
O: Connective tissue covering of superior chest muscles
I: Tissue around mouth
A:Tenses skin of neck
Pec Major
O: sternum, clavicle, 1st-6th ribs
I: Proximal humerous: Greater tubercle of humerous
A: Adducts and flexes humerous
Pec Minor
O: Anterior surface of ribs 3-5
I:Coracoid process of scapula
A: Draw scapula fwd and dwd w/ ribs fixed draws rib cage superior with fixed scapula
Rectus Abdominis
O:Pubis, Pubic crest, and adjacent ligament
I: Xiphoid process 5th and 7th ribs
A:Flexes vertebral column
Transverse abdominis
O:costal cartilage of lwr 6th ribs
Inguinal ligament
lumbodorsal fascia
I: Linea alba and pubic crest
A: compresses ab controlsInternal Oblique
O: Anterior 2/3’s iliac crest, inguinal ligament, fascia sheaths
I: lower 3-4 ribs, pubic crest, line alba
A: flexes and rotates vertbral column
Ext Oblique
O: Lower 8 ribs
I: Iliac crest
A: flexes and rotates vertebral column
Serratus anterior
O: series of muscles slips from ribs 1-8
I;anterior surface of vertebral border of scapula
A; PM to protract and hold scapula angst chest wall rotate scar wall
Trapezius
O: Occipital bone, spinous process of c7 and all thoracic vertebra
I: Scapular spine and clavicle
A: raises, retracts, and rotates scapula
Quadratus lumborum
O: iliac crest, iliolumbar fascia
I: Transverse process of upper lumbar vert
A: along with the erector spine it extends and flexes sp laterally
Deltoid
O: scapular spine, clavicle
I: Deltoid tuberosity of humorous
A: Abducts Humerous and is PM
Who is the deltoids antagonist?
lat dorsi and pec major because they adduct humorous
Supraspinatus
O: supraspinatus fossa
I: superior most part if greater tubercle of humorous
A:Abduction arm, stabilize SJ aides with pref dad dislocation of humerous
subscapularus
O: subscapularis fossa
I: Lesser tubercle
A: Medial arm rotation and helps hold head of humorous in the glenoid cavity
Infraspinatus
O: infraspinatus fossa
I: Greater tubercle
A: lateral arm rotation and helps to hold head of humorous in glenoid cavity
Teres Major
O: Post/dorsal surface of inferior angle of scapula
I: crest of lesser tubercle
A: extends, medially rotate and adducts humorous and synergists to lat dorsi
Teres Minor
O: Lateral border of dorsal scapular surface
I:greater tubercle
A:lateral rotates humorous, holds head of humorous in glenoid cavity
