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What is the muscle agonist?
The prime mover; the muscle which performs the movement in question
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What is the antagonist?
The muscle that performs the opposing movement to that of the agonist.
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What is the muscle synergist?
The muscle that aids agonist with a little more force or reduces unwanted movement.
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What is a tendon?
Connective tissue that attaches muscle to bone.
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What is Aponeuroses?
A broad, flat, tendinous attachment
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What is the orgin of a muscle?
More axial or fixed point of attachment.
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What is the insertion of a muscle?
More appendicular or moveable point of attachment
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What is the OIA (orgin, Insertion and action) of the Masseter?
- O: Zygomatic arch
- I: Mandibular ramus
- A: Closes mandible
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What is the OIA (orgin, insertion and action) of the Temporalis?
- O: Temporal lines
- I: Mandibular coronoid process and ramus
- A: Closes mandible
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What is the OIA (orgin, insertion and action) of the Platysma?
- O: Fascia in chest
- I: Lower border of mandible in lower skin of the face
- A: Flexes neck if jaw is fixed (facial expressions)
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What is the OIA (orgin, insertion and action) of the Sternocleidomastoid?
- O: Sternum, clavicle
- I: Mastoid
- A: Unilaterally rotates head to oppisite side - bilaterally flexes head anteriorly - holds head erect
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What is the OIA (orgin, insertion and action) of the extensors of the Vertebral column?
- O: Iliac crest, sacrum, spinous processes
- I: Transverse processes, spinous processes and ribs
- A: Back extension, posture, lateral bending
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What are the 3 extensors of the vertebral column?
- Iliocostalis (lateral)
- Longissimus
- Spinalis (Most medial)
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What is the OIA (orgin, insertion and action) of the Rectus abdominus?
- O: Pubis and tendon transverse abdominus medial
- I: Lower ribs and xiphoid
- A: Flex trunk and compress viscera
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What is the OIA (orgin, insertion and action) of the Transversus Abdominus?
- O: Thoracodorsal aponuerosis
- I: Other 1/2 of self, pubis
- A:Compress/support viscera
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What is the OIA (orgin, insertion and action) of the Internal Oblique?
- O: Thoradorsal aponeuroses, inguinal ligament and iliac crest
- I: Pubis (linea alba-midline)
- A: Trunk rotation (with rotation to same side Orgin pulled toward insertion)
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What is the OIA (orgin, insertion and action) of the External Oblique?
- O: Lower ribs, xiphoid, thorasorsal fascia, iliac creast and AXIS
- I: Pubis (linea alba-midline)
- A: Trunk rotation (with rotation to opposite side Orgin pulled toward insertion)
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What is the OIA (orgin, insertion and action) of the External intercostals?
- O: Supero-lateral
- I: Infero-medial
- A: Elevates - inspiration
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What is the OIA (orgin, insertion and action) of the Internal intercostals?
- O: Super-medial
- I: Infero-medial
- A: Elevates-inspiration
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What is the OIA (orgin, insertion and action) of the Scalenes?
- O: Cervical transverse process
- I: Ribs 1 and 2
- A: Lifts ribs superiorly for inspiration
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What is the OIA (orgin, insertion and action) of the Pectoralis Minor?
- O: Ribs 3-5
- I: Coracoid process
- A: Depresses scapula, elevates ribs when scapula is fixed
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What is the OIA (orgin, insertion and action) of the Subscapularis?
- O: Subscapular fossa
- I: Lesser tubercle
- A: Internal rotation
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What is the OIA (orgin, insertion and action) of the Supaspinatus?
- O: Supraspinous fossa
- I: Greater tubercle
- A: Initiates ABduction for 1st 30 degrees
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What is the OIA (orgin, insertion and action) of the Teres Minor?
- O: Scapula
- I: Greater tubercle
- A: External rotation
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What is the OIA (orgin, insertion and action) of the Infraspinatus?
- O: Infraspinous fossa
- I: Greater tubercle
- A: External rotation
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What is the OIA (orgin, insertion and action) of the Pectoralis major?
- O: Clavicle, sternum
- I: Intertubercular groove
- A: ADucts and rotate internally humerus, assist flexion
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What is the OIA (orgin, insertion and action) of the Deltoid?
- O: Acromion process and clavicle
- I: Deltoid tuberosity of humerous
- A: ABuct humerus 30-90 degrees, some extend and flex
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What is the OIA (orgin, insertion and action) of the Latissimus dorsi?
- O: Thoracodorsal fascia, Thoracic and lumbar spinous process, ilium
- I: Intertubercular groove
- A: Extend, internally rotate, ADuct arm
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What is the OIA (orgin, insertion and action) of the Corcobrachialis?
- O: Coracoid process of scapula
- I: Humeral shaft
- A: Shoulder flexion
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What is the OIA (orgin, insertion and action) of the Teres Major?
- O: Scapula
- I: Intertubercular groove
- A: Internal rotation, extension, ADucts humerus
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What is the OIA (orgin, insertion and action) of the Serratus Anterior?
- O: Ribs 1-8
- I: Infero-medial scapula
- A: Aduct arm >90 degrees
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What is the OIA (orgin, insertion and action) of the Rhomboid (major and minor)?
- O: C7-T5 spinous process
- I: Scapula
- A: Retracts and elevates scapula, tilts glenois fossa inferiorly
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What is the OIA (orgin, insertion and action) of the Levator scalulae?
- O: Transverse process C1-C4
- I: Scapula
- A: Retracts and elevates scapula
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What is the OIA (orgin, insertion and action) of the Pectoralis minor?
- O: Ribs 3-5, anteriorly
- I: Caracoid process of scapula
- A: Protracts and depresses scapula
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What is the OIA (orgin, insertion and action) of the Trapezius (Upper, Middle and Lower)?
- O: Occipital (U), Cervical spinous process (M) and Thoracic spinous processes(L)
- I: Scapula spine and acromion process
- A: Elevates (U, Retracts (M), Depresses (L)
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What is the OIA (orgin, insertion and action) of the Tricep brachii?
- O: Inferior edge of glenoid fossa
- I:
- A:
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