Muscles Flashcards
Name, Origin, Insertion, Action
Origin - wall of orbit
Insertion - Skin around Origin
Name - Orbicularis oculi
Action - close eyes
Name, Origin, Insertion, Action
Name - Orbicularis oris
Insertion - Skin around mouth
Origin - Muscles around mouth
Action - Protrude Lips
Name, Origin, Insertion, Action
Name - Zygomaticus Major
Origin - zygomatic bone
Insertion - skin at corners of
mouth
Action - smiling
Name, Origin, Insertion, Action
Name - Masseter
Origin - Maxilla and Zygomatic Arch
Insertion - Mandible
Action - elevates mandible
(chewing)
Name, Origin, Insertion, Action
Name - Temporalis
Origin - Temporal bone
Insertion - Mandible
Action - Elevates and retracts mandible (Chewing)
Name, Origin, Insertion, Action
Name - Sternocleidomastoid
Origin - Manubrium and Clavicle
Insertion - Occipital bone and
mastoid process
Action - Flexes and rotates head
Name, Origin, Insertion, Action
Name - Trapezius
Origin - Occipital bone and
thoracic vertebrae
Insertion - Clavicle and Scapula
Action - Extends head and elevates
scapula (shrugging)
Name, Origin, Insertion, Action
Name - Pectoralis Major
Origin - Medial Clavicle and Sternum
Insertion - Humerus
Action - Adduction of the Humerus (ex pushups), Medial Rotation of shoulder
Name, Origin, Insertion, Action
Name - Pectoralis Minor
Origin - Ribs 3-5
Insertion - Coracoid Process of the Scapula
Action - Elevates ribs during forced inspiration and pulls scapula forward and down
Name, Origin, Insertion, Action
Name - Rectus Abdominus
Origin - Pubic Symphisis
Insertion - Cartilage of Ribs of 5-7, and Xiphoid process
Action - Flexes Vertebral Column, Aids in Defecation, Urination, Forced Expiration, and Childbirth
Name, Origin, Insertion, Action
Name - External Obilique
Origin - Ribs 5 - 12
Insertion - Linea Alba
Action - Flexion and Rotation of the Vertebral Column
Name, Origin, Insertion, Action
Name- Internal Obilique
Origin - Ilium
Insertion - Cartilage of Ribs 9-12
Action - Flexion and Rotation of Vertebral Column
Name, Origin, Insertion, Action
Name - Transverse Abdominus
Origin - Ilium, Lumbar Fascia, and Ribs 6-112
Insertion - Xiphoid process, Linea alba, and pubis
Action - Compresses abdomen and stabilizes trunk
External Intercostals
Origin - Rib Above
Insertion - Rib Below
Action - Increases thoracic volume during normal inspiration involved in relaxation during normal expiration
Internal Intercostals
Origin - Rib Below
Insertion - Rib above
Action - Depresses ribs (forced expiration)
Diaphragm
Origin - Xiphoid process, cartilage of ribs 6-12 and lumbar vertebrae
Insertion - Central Tendon
Action - Causes flattening during contraction, increases thoracic volume during normal inspiration
Name, Origin, Insertion, Action
Name - Suprasinatus
Origin - Scapula
Insertion - Humerus
Action - Abduction of arm