Origin Insertion Action Flashcards
Zygomatic arch
Mandible
Elevates mandible
Masseter
Sternum/Clavicle
Mastoid process of temporal bone
Rotates head
Sternocleidomastoid
Sternum, Clavicle
Greater tubercle of humerus
Rotates, adducts arm
Pectoralis major
Ribs 3 - 5
Coracoid process of scapula
Protracts scapula; elevates ribs
Pectoralis minor
Pubis
Xyphoid process, costal cartilages
Flexes trunk, compresses abdomen
Rectus abdominis
Lower ribs
Iliac crest, linea alba
Flexes, rotates trunk
External oblique
Iliac crest
Lower ribs, linea alba
Flexes, rotates trunk
Internal oblique
Xiphoid process, lower ribs, lumbar vertebrae
Central tendon
Inflates lungs
Diaphragm
Ribs
Ribs adjacent, but inferior
Raise ribcage, inflate lungs
External intercostals
Ribs
Ribs adjacent, but superior
Deflate lungs
Internal intercostals
Superior ribs
Medial border of scapula
Abducts scapula
Serratus anterior
Superior nuchal line of occ. bone, cervical and thoracic vertebrae
Acromion and spine of scapula
Moves scapula
Trapezius
Lower vertebrae spinous processes, sacral spine, iliac crest
Intertubercular sulcus of humerus
Adducts, rotates arms
Latissmus dorsi
Lateral clavicle, acromion and spine of scapula
Deltoid tuberosity of humerus
Abducts, rotates arm
Deltoid
Upper rim of glenoid fossa, coracoid process of scapula
Radial tuberosity of radius
Flexes arm at elbow
Biceps brachii