Lab Activity 11: Group IOrigin and InsertionMUSCLES OF THE HEAD Frontalis Occipitalis Orbicularis Oculi Temporalis Masseter Orbicularis Oris Zygomaticus Major Risorius SUPERFICIAL MUSCULATURE OF THE NECKOmohyoid Sternohyoid Mylohyoid Digastric Anterior BellyDigastric Posterior Belly MUSCLES OF THE NECK & BACK Sternocleidomastoid Trapezius Latissimus Dorsi Levator Scapula Rhomboid Major Rhomboid Minor Serratus Anterior Erector Spinae MUSCLES OF THE THORACIC WALL External Intercostal Internal Intercostal Pectoralis Major Pectoralis Minor MUSCLES OF THE ANTERIOR ABDOMINAL WALL Rectus Abdominus External Abdominal Oblique Internal Abdominal Oblique Transverse Abdominis Deltoid Supraspinatus Infraspinatus Teres Minor Teres Major Subscapularis Biceps BrachiiCoracobrachialis Triceps Brachii BrachialisLab Activity 11: Group IMusclesMartini Chapter 11Portland Community CollegeBI 2312Origin and Insertion• Origin: The place where the fixed end attaches to a bone, cartilage, or connective tissue.• Insertion: The site where the movable end attaches to another structure.MUSCLES OF THE HEAD4Frontalis• Origin: Epicranial aponeurosis• Insertion: Skin over forehead• Action: Elevates eyebrows and wrinkles skin of foreheadEpicranial Aponeurosis5Occipitalis• Origin: Occipital and temporal bones • Insertion: Epicranial aponeurosis • Action: Fixes epicranial aponeurosis and pulls scalp posteriorly6Orbicularis Oculi • Origin: Medial orbital margin and zygomatic bone • Insertion: Skin surrounding eye • Action: Closes eyelids and depresses skin of forehead7Temporalis • Origin: Temporal fossa • Insertion:Coronoid process of mandible• Action: Elevates and retracts mandible8Masseter • Origin:Zygomatic process and arch• Insertion: Angle and ramus of mandible • Action: Elevates mandible9Orbicularis Oris• Origin: By muscular skips to surround muscles• Insertion: Muscles interlace to surround mouth • Action: Closes and purses lips10• Origin: Zygomatic arch• Insertion: Corner of mouth• Action: Elevates corner of mouth Zygomaticus Major11• Origin: Fascia of masseter• Insertion: Corner of mouth• Action: Draws corner of mouth laterally RisoriusSUPERFICIAL MUSCULATURE OF THE NECK13• Origin: Medial tip of suprascapular notch• Insertion: Body of hyoid bone• Action: Depresses hyoid boneOmohyoid14• Origin: Posterior surface of manubrium, and medial clavicle• Insertion: Hyoid bone• Action: Depresses hyoid boneSternohyoid15• Origin: Mylohyoid line of mandible• Insertion: Hyoid bone• Action: Elevates hyoid bone and floor of mouth, depresses mandibleMylohyoid16• Origin: Lower border of mandible near midline • Insertion: Intermediate tendonon the hyoid bone• Action: Elevates hyoid bone and base of tongue, depresses mandibleDigastricAnterior Belly17• Origin: Mastoid notch of temporal bone• Insertion: Intermediate tendonon the hyoid bone• Action: Moves hyoid bone backDigastricPosterior BellyMUSCLES OF THE NECK & BACK19• Origin: Manubrium and medial third of clavicle• Insertion: Mastoid process• Action: Rotates head to opposite side, extends head, and flexes vertebral columnSternocleidomastoid20Trapezius • Origin: External occipital protuberance, superior nuchal line and spinous process of C7-T12• Insertion: Anterior border of scapular spine, acromion process, lateral third of clavicle•Action: Elevates, adducts, and depresses scapula21Latissimus Dorsi • Origin: Spinous processes of lower 6 thoracic vertebrae, thoracolumbar fascia, crest of ilium• Insertion: Intertubercular groove of humerus• Action: Extends, rotates humerus medially, draws shoulder down and backward22• Origin: Transverse processes of C1-4• Insertion: Superior angle spine of scapula• Action: Elevates scapulaLevator Scapula23• Origin: Spinous process of T1-5and supraspinous ligament• Insertion: Medial border below spine of scapula• Action: Adducts scapula and performs downward rotationRhomboid Major24• Origin: Spinous process of C7-T1• Insertion: Medial border of scapula at base of spine• Action: Adducts scapula and performs downward rotationRhomboid Minor25• Origin: Lateral surface of upper 8 ribs• Insertion: Anterior lip of medial border of scapula• Action: Holds scapula to chest wall, medially rotates scapula in abducting or extending humerusSerratus Anterior26• Origin: Sacrum, iliac crest, spinous processes of lumbar vertebrae and T11,12• Insertion: Angles of the ribs. Spinous & Transverse processes of vertebrae • Action: Extension of vertebral columnErector SpinaeMUSCLES OF THE THORACIC WALL28• Origin: Inferior border of rib above• Insertion: Superior border of rib below• Action: Elevates rib cage during inspirationExternal Intercostal29• Origin: Superior border of rib below• Insertion: Inferior border of rib above• Action: Depresses rib cage during expirationInternal Intercostal30Pectoralis Major • Origin: Medial half of clavicle, sternum, costal cartilages, aponeurosis of external abdominal oblique• Insertion: Intertubular groove of humerus• Action: Flexes, adducts, and medially rotates humerus, draws body upward in climbing31• Origin: Anterior surface of ribs 3 to 5• Insertion: Coracoid process of scapula• Action: Draws scapula down and forward and elevates ribsPectoralis MinorMUSCLES OF THE ANTERIOR ABDOMINAL WALL33• Origin: Pubic symphysis and crest of pubis• Insertion: Xiphoid process and cartilages of ribs 5 to 7• Action: Tenses abdominal wall and flexes vertebral columnRectus Abdominus34• Origin: External surface of lower 8 ribs• Insertion: Anterior half of iliac crest and linea alba• Action: Compresses abdomen, contralaterally rotates and flexes vertebral columnExternal Abdominal Oblique35• Origin: Lateral half of inguinal ligament, anterior iliac crest and thoracolumbar fascia• Insertion: Lower four ribs, linea alba and by conjoined tendon to pubis• Action: Compresses abdomen, ipsilaterally rotates and flexes vertebral columnInternal Abdominal Oblique36• Origin: Lateral third of inguinal ligament, anterior iliac crest, and thoracolumbar fascia• Insertion: Linea alba, and by conjoined tendon to pubis• Action: Compresses abdomen Transverse Abdominis37• Origin: Anterior surface, lateral clavicle, acromion process and spine of scapula• Insertion: Deltoid tubercle of humerus• Action: Abducts humerus; aids in flexion, extension, and internal and external