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Muscular System Human Anatomy and Physiology I Oklahoma City Community College Dennis Anderson
2 Muscles Movement Posture Stabilize joints Generate heat Protect
6 Dorsiflexion & Plantar Flexion
7 Abduction, Adduction & Circumduction
11 Terminology Prime mover (Agonist) –Muscle that is the main force for a given movement Biceps—prime mover for elbow flexioin Antagonist –Muscle that oppose a given movement Triceps
12 Terminology Continued Synergist –Muscle that works with another muscle for a given movement Belly –Thickest part of muscle –Biceps belly near the middle of the humerus
13 Muscle Attachments Origin Insertion
14 Origin Muscle attachment that moves the least Insertion Muscle attachment that moves the most
Sternocleidomastoideus Flexes and Rotates Head O: Sternum Manubrium & Clavicle I: Mastoid process
Masseter Elevate Mandible O: Zygomatic Arch I: Mandible
Temporalis Elevate & Retract Mandible
18 Orbicularis oris Closes & Protrudes Lips O: Maxilla & Mandible I: Mouth
19 Buccinator Sucking & Whistling
Trapezius Extend Head, Adduct, Elevate or Depress Scapula Trapezius
21 Rhomboid Major Adduct Scapula
22 Teres Major Adduct Humerus O: Scapula I: Humerus
Latissimus Dorsi Extend, Adduct & Rotate Arm Medially Latissimus dorsi O: Vertebrae, Ilium, Ribs, Scapula I: Humerus
Deltoid Abduct, Flex & Extend Arm O: Clavicle and Scapula I: Deltoid Tuberosity of Humerus
Supraspinatus Abduct arm
Infraspinatus Rotates Humerus Laterally
Pectoralis Major Flexes, adducts & rotates arm medially O: Clavicle and Sternum I: Greater Tubercle of Humerus
Biceps Brachii Flexes Elbow Joint O: Coracoid Process & Glenoid Cavity I: Radial Tuberosity
Triceps Brachii Extend Elbow Joint O: Humerus & Scapula I: Olecranon
30 Brachialis Flex forearm O: Humerus I: Ulna
31 Brachioradialis Flex Forearm
32 Flexor Carpi Radialis Flex Wrist
33 Flexor Digitorum Superficialis Flex Fingers
34 Pronator Teres Pronates forearm
35 Supinator Supinates forearm
36 Estensor Carpi Radialis Longus Extend Wrist
37 Estensor Digitorum Extend Fingers
Rectus Abdominus Flexes Abdomen O: Pubis I: Xiphoid Process & Cartilage of Ribs
External Oblique Compress Abdomen
Internal Oblique Compress Abdomen
External Intercostals Elevate ribs
Internal Intercostals Depress ribs
Gluteus Maximus O: Ilium, Sacrum & Coccyx I: Gluteal Tuberosity Extends & Rotates Thigh Laterally
Rectus Femoris O: Ilium I: Patella & Tibial Tuberosity Flexes Thigh, Extends Lower Leg
Vastus Lateralis Extends Lower Leg
Vastus Medialis Extends Lower Leg
Adductor Longus Adduct, Rotate & Flex Thigh Laterally
Gracilis Adducts and Flexes Thigh O: Ischium and Pubis I: Tibia
Sartorius O: Anterior Superior Iliac Spine I: Medial Side of Tibia Flexes Thigh, & Rotates Thigh Laterally
Biceps Femoris O: Ischial Tuberosity I: Tibia & Fibula Extends Thigh & Flexes Lower Leg
Semitendinosus Extends Thigh & Flexes Lower Leg
Semimembranosus Extends Thigh & Flexes Lower Leg
Gastrocnemius O: Femur I: Calcaneus of Foot Plantar Flexes Foot & Flex Lower Leg
Soleus Plantar Flexes Foot
Tibialis Anterior Dorsiflexes and Inverts Foot O: Lateral Condyle of Tibia I: Ankle
58 THE END
BIO 210 Chapter 10 Part 2 Important Skeletal Muscles.
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