(Week 5)
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| The _______ _______ is made up of the bones of the limbs and their girdles. | appendicular skeleton
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| The _______ _______ consist of the clavicles anteriorly and the scapulae posteriorly. | shoulder girdles (pectoral girdles)
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| The shoulder girdles provide attachment points for muscles that move the _______ _______. | upper limbs
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| The _______ are triangular, flat bones lying on the dorsal surface of the rib cage, between the second and seventh ribs. | scapulae
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| There are ___ borders, ___ angles, and ____ fossa on each scapula. | 3,3,4
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| The three borders of scapulae are: | superior, medial, lateral
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| The three angles of scapulae are: | superior, inferior, and lateral
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| The four fossa of scapula are: | infraspinous, supraspinous, subscapular, glenoid
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| The _______ are slender, doubly curved long bones lying across the superior thorax. | clavicles
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| The _______ is the sole bone of the arm. | humerus
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| The humerus articulates with the _______ at the shoulder and the _______ and _______ at the elbow. | scapula, radius, ulna
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| The Glenohumeral, Acromioclavicular, Sternoclavicular, Sternocostal, & Scapulothoracic are all joints of the _______ _______. | pectoral girdle (shoulder girdle)
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| The prime movers of shoulder elevation are the _______ and _______ _______. | trapezius, levator scapulae
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| The five scapular movements are: | scapulothoracic rotation, protraction, retraction, elevation, depression
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| The four anterior extrinsic muscles of the thorax are: | pectoralis major, pectoralis minor, serratus anterior, subclavius
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| The four posterior extrinsic muscles of the thorax are: | latissimus dorsi, trapezius muscles, levator scapulae, rhomboids
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| ___ muscles cross the shoulder joint and insert into the humerus. | 9
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| _______ _______ is the prime mover of arm flexion. | Pectoralis major
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| _______ _______ and the posterior fibers of the _______ are prime movers of arm extension. | Latissimus dorsi, deltoid
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| The _______ (middle fibers) is the prime mover of arm abduction. | deltoid
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| The rotator cuff muscles are: | supraspinatus, infraspinatus, teres minor, subscapularis
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| The function of the _______ _______ muscles are mainly to reinforce the capsule of the shoulder, and secondarily they act as synergists and fixators, preventing shoulder dislocation. | rotator cuff
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| The _______ and _______ _______ do not contribute to reinforcement of the shoulder joint. | coracobrachialis, teres major
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| The general actions of the anterior muscles crossing the shoulder are: | flexion of shoulder, internal rotation
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| The general actions of the posterior muscles crossing the shoulder are: | extension of shoulder, external rotation of shoulder (except teres major and latissimus dorsi)
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| The general actions of the middle/lateral muscles crossing the shoulder are: | abduction
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| Pectoralis Minor O.I.A. | O: ant surface of ribs 3-5 (book says 2-4)
I: coracoid process of scapula
A: scapula protraction (forward) & depression (downward), w/ scap fixed, draws rib cage up
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| Serratus Anterior O.I.A. | O: slips from ant ribs 1-8(9)
I: ant surface medial border scapula
A: scap protraction & stabilize against thorax (upward rotation)
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| Subclavius O.I.A. | O: costal cartilage of 1st rib
I: inf clavicle
A: stabilize and depress pectoral girdle
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| Upper Trapezius O.I.A. | O: Occiput, nuchal lig, SP C1-7
I: lat 1/3 of clavicle
A: Elevation of scapula
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| Middle Trapezius O.I.A. | O: SP C7-T3
I: medial Acromion, Upper border scap spine
A: retraction and upward rotation of scapula
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| Lower Trapezius O.I.A. | O: SP T4-12
I: inferior medial border scap spine
A: depression & downward rotation
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| Levator Scapulae O.I.A. | O: TP C1-4
I: med border of scapula, superior to the spine of scapula
A: elevation of scapula; if scap is fixed ipsilat lat flex/rot of neck
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| Rhomboids Major and Minor O.I.A. | O: SP C7-T1 (minor) T2-5 (major)
I: medial border of scap (minor root of spine, major med border spine to inf angle)
A: scap retraction, stabilization, & downward rotation
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| Pectoralis Major O.I.A. | O: sternal end of clavicle, Sternum & cartilage rib 1-6(7), (aponeurosis ext oblq)
I: Greater tubercle, bicipital/intertubicular groove humerus (lateral lip)
A: arm: PM of flex, medial rot, add. w/ arm & scap fixed pulls thorax up (pullups, climbing)
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| Latisimus Dorsi O.I.A. | O: SP T7-12, indirect via thoracolumbar fascia (L1-5), illiac crest (lower 3-4 ribs)
I: spirals to insert into floor of bicipital/intertubicular groove
A: arm: PM of Ext Add, med rot. w/ arm fixed pulls body up, downward power stroke (hammer,swim,row)
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| Anterior Deltoid O.I.A. | O: lat 1/3 of clavicle
I: deltoid tuberosity of humerus
A: flex, med/int rot, abd of humerus, pec Mj syn
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| Middle Deltoid O.I.A. | O: Acromion
I: deltoid tuberosity of humerus
A: abd of humerus
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| Posterior Deltoid O.I.A. | O: spine of scap
I: deltoid tuberosity of humerus
A: extension, ext rot, abd of humerus
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| Supraspinatus O.I.A. | O: supraspinous fossa of scapula
I: superior part of greater tubercle of humerus
A: initiates abduction, stabilizes shoulder joint
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| Infraspinatus O.I.A. | O: infraspinous fossa of scap
I: middle part of greater tubercle of humerus
A: stabilizes shoulder joint, rotates humerus laterally
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| Teres minor O.I.A. | O: inf lat border of scap
I: inf part of greater tubercle of humerus
A: stabilizes shoulder joint, rotates humerus laterally
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| Subscapularis O.I.A. | O: subscapular fossa
I: lesser tubercle of humerus
A: chief med rot of humerus (with pec Mj), stabilizes shoulder joint
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| Teres Major O.I.A. | O: Post surface of scap at inf angle
I: floor of bicipital/intertubicular groove shared w/ lat dorsi
A: add & med rot, ext of humerus
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| Coracobrachialis O.I.A. | O: coracoid process of scap
I: medial surface of mid humerus shaft
A: flex, add of arm, syn of pec Mj
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| Biceps Brachii (short & long head) O.I.A. | O: Short: coracoid process of scap long:supraglenoid tubercle and lip of glenoid cavity; tendon of long head runs w/in capsule & into intertubercular sulcus of humerus
I: radial tuberosity
A: elbow flex, forearm supination; long head weak shoulder flex
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| Triceps Brachii (long, med, & lat head) O.I.A. | O: long: infraglenoid tubercle of scap, lat: post shaft of humerus, med: post humerus distal to radial groove
I: common tendon to olecranon process of ulna
A: PM of elbow ext, antagonist of elbow flex
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