the muscular system major movers and shakers biol 2400 – anatomy and physiology 1 chapter 11
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The Muscular System Major Movers and Shakers
BIOL 2400 – Anatomy and Physiology 1Chapter 11
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Temporalis
O: Temporal bone
I: Coronoid process and ramus of the mandible
A: Elevation of the mandible
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Orbicularisoculi
O: Medial wall of the orbit I: Medial wall of the orbit A: Closes the eyelidClick for Answer
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Orbicularisoris
O: Opening of the mouth I: The skin at the cornersof the mouth A: Closes the mouthClick for Answer
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Masseter
O: Maxilla and the anterior portion of thezygomatic arch I: Angle and the ramus of the mandible. A: Elevation of the mandible
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Zygomaticusmajor
O: Zygomatic bone I: The skin at the corners of the mouth and the orbicularis oris A: Elevates the skin at the corners of the mouth (smiling)
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Depressor angulioris
O: Anterior 1/3 of the body of the mandible, lateral to the mental foramen I: Angle of the mouth A: Draws the angle of the mouth laterally and inferiorly, as in opening the mouth
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Supraspinatus
O: The supraspinous fossa of the scapula
I: The greater tubercle of the humerus
A: Weak ABduction of the shoulder joint
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Infraspinatus
O: The infraspinous fossa of the scapula
I: The greater tubercle of the humerus A: Lateral rotation of the humerus
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Teresminor
O: Inferior lateral border of the scapula
I: The greater tubercle of the humerus
A: Lateral rotation of the humerusClick for Answer
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Pectoralisminor
O: Ribs 3 through 5 I: The coracoid process of the scapula
A: Protraction of the scapula
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Rhomboidmajor
O: The spinous processes of T2 through T5 I: The vertebral border of the scapula, inferior to the spine A: Retraction of the scapulaClick for Answer
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Rhomboidminor
O: The spinous processes of C7 through T1 I: The vertebral border of the scapula, superior to the spine A: Retraction of the scapula
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Levatorscapulae
O: The transverse processesof C1 through C4 I: The superior angle of the scapula A: Elevation of the scapula
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Supinator
O: The lateral epicondyle of the humerus
I: The lateral surface of the proximal third of the radius
A: Supination of the forearmClick for Answer
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Pronatorteres
O: The medial epicondyle of the humerus and the coronoid process of the ulna
I: The midlateral surface of the radius
A: Pronation of the forearmClick for Answer
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Tricepsbrachii
O: Long head: the inferior margin of the Glenoid fossaLateral head: the lateral, posterior surface of the humerusMedial head: the posterior surface of the humerus I: The olecranon of the ulna A: Extension of the elbow joint
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BrachialisO: The distal, anterior surface of the humerus I: The coronoid process of the ulna A: Flexion of the elbow jointClick for Answer
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Bicepsbrachii
O: Long head: superior margin of the Glenoid fossaShort head: the coracoid process of the scapula I: The radial tuberosity of the radius A: Flexion of the elbow joint
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ExternalobliquesO: The last eight (8) ribs I: The iliac crest and the linea alba A: Both: flexion of the vertebral column Single: lateral flexion of the vertebral column
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Latissimusdorsi
O: Spinous processes of T6 through L5, the iliac crest, the sacrum and ribs 9 through 12
I:The intertubercular groove of the humerus
A: ADduction of the humerus
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Pectoralismajor
O:The clavicle, the sternum and the costal cartilage of ribs 2 through 6
I: The greater tubercle of the humerus
A: ADduction of the humerus
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TrapeziusO: The occipital bone and the spinous processes of C7 through T12
I: The clavicle, the acromion and the spine of the scapula
A: Stabilizes the scapula Superior fibers: elevation of the scapula Intermediate fibers: retraction of the scapula Inferior fibers: depression of the scapula
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Iliopsoas-Iliacus
O: The iliac fossa and the sacrum
I: The lesser trochanter of the femur
A: Flexion of the hip jointClick for Answer
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Iliopsoas-Psoas major
O: The transverse processes and bodies of L1 through L5
I: The lesser trochanter of the femur
A: Flexion of the hip joint
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Adductorlongus
O: The pubic crest and the symphysis pubis
I: The linea aspera of the femur
A: ADduction of the hip jointClick for Answer
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Fibularis(Peroneus)longus
O: The lateral condyle of the tibia and the head and shaft of the fibula
I: The first metatarsal and the medial cuneiform
A: Plantar flexion of the ankle joint
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Soleus
O: The head of the fibula and the medial shaft of the tibia I: The calcaneus by way of the Achilles tendon A: Plantar flexion of the ankle joint
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Gastrocnemius
O: The medial and lateral condyles of the femur I: The calcaneus by way of the Achilles tendon
A: Plantar flexion of the ankle joint
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Tibialisanterior
O: The lateral condyle and the shaft of the tibia I: The first metatarsal and the medial cuneiform A: Dorsiflexion of the ankle joint
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Quadricepsfemoris
Made of four muscles:1)Rectus femoris2)Vastus lateralis3)Vastus medialis4)Vastus intermedius
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Quadricepsfemoris
Rectus FemorisO: The anterior inferior iliac spine (AIIS) I: The tibial tuberosity via the patellar ligament A: Extension of the knee joint Vastus LateralisO: The greater trochanter and the linea aspera of the femur
I: The tibial tuberosity via the patellar ligament
A: Extension of the knee joint
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Quadricepsfemoris
Vastus MedialisO: The linea aspera of the femur
I: The tibial tuberosity via the patellar ligament
A: Extension of the knee joint Vastus IntermediusO: The anterior and lateral surfaces of the shaft of the femur
I: The tibial tuberosity via the patellar ligament
A: Extension of the knee joint
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Sartorius
O: The anterior superior iliac spine (ASIS)
I: The medial surface of the proximal shaft of the tibia
A: ABduction of the hip joint
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GluteusmediusO: The ilium I: The greater trochanter of the femur A: ABduction of the hip joint
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Bicepsfemoris
O: Long head: the ischial tuberosityShort head: the linea aspera of the femur
I: The lateral condyle of the tibia and the head of the fibula
A: Flexion of the knee joint
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Gluteusmaximus
O: The iliac crest, the sacrum and the coccyx I: The gluteal tuberosity of the femur A: Extension of the hip joint
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Anteriordeltoid
O: The clavicle, the acromion and the spine of the scapula I: The deltoid tuberosity
A: ABduction of the shoulder joint Anterior head: flexion of the shoulder joint Lateral head: Abduction of the shoulder joint Posterior head: extension of the shoulder joint
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PosteriordeltoidO: The clavicle, the acromion and the spine of the scapula I: The deltoid tuberosity
A: ABduction of the shoulder joint Anterior head: flexion of the shoulder joint Lateral head: ABduction of the shoulder joint Posterior head: extension of the shoulder joint
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RectusabdominisO: The pubic crest and the symphysis pubis I: Costal cartilage of ribs 5, 6 and 7 A: Flexion of the vertebral columnClick for Answer
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Sternocleidomastoid
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Sternocleidomastoid
O: The sternum and the clavicle I: The mastoid process of the temporal bone A: Both: flexion of the cervical vertebrae Single: rotation of the head to the opposite side
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Platysma
O: Fascia over the deltoidand pectoralis major muscles I: Mandible, muscles aroundthe angle of the mouth, and the skin of the lower face A: Depression of the mandible
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