Muscle Tissue / Axial Muscle 2251L

Sternocleidomastoid

Origin: Manubrium of sternum, medial clavicle

Insertion: Mastoid Process of Temporal Bone

Action: Flexion of head & neck, rotation of head

Epicranius

Orbicularis Oculi

Temporalis

Massester

Orbicularis Oris

Buccinator

Zygomaticus Major

Zygomaticus Minor

Pectoralis Major

Origin: Clavicle, Sternum, & costal cartilages of ribs 1-7

Insertion: Intertubercular sulcus of humerus

Action: Flexes, adducts, medially rotates arm.

Pectoralis Minor

Trapezius

Origin: Occipital Bone, Spinous Processes C7-T12

Insertion: Clavicle, spine, acromion of scapula

Action: extends head; elevates, superiorly rotates, retracts & depresses scapula

Latissimus Dorsi

Origin: Spinous Processes T7-12, Ribs 8-12 & Iliac Crest

Insertion: Intertubercular sulcus of humerus

Action: Extends, adducts, medially rotates arm

Rectus Abdominus

Origin: Pubic Crest & symphysis

Insertion: xiphoid process of sternum and costal cartilages of ribs 5-7

Action: Flexes Vertebral Column & Compresses abdominal wall; forced expiration

External Obliques

Internal Obliques

Transversus Abdominus

Erector Spinae

External Intercostals

Internal Intercostals

Diaphragm

Skeletal Muscle

Cardiac Muscle

Smooth Muscle