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Functional anatomy > Chap 12 shoulder girdle > Flashcards

Chap 12 shoulder girdle Flashcards

1
Q

The shoulder girdle contains

A

sternum, clavical, scapula, sternoclavicular joint, acromioclavicular joint, scapulothoracic joint

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2
Q

glenohumeral joint contains

A

glenoid fossa of scapula and head of humerus

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3
Q

elevation

A

scapula moves superiorly

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4
Q

depression

A

scapula moves inferiorly

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5
Q

protraction

A

scapula moves away from the vertebral

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6
Q

retraction

A

scapula moves toward the vertebral

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7
Q

upward rotation

A

rotation of the inferior angle laterally and superiorly

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8
Q

downward rotation

A

rotation of the inferior angle medially and inferiorly

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9
Q

scapular tilt

A

rotation of the inferior angle posteriorly

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10
Q

scapular winging

A

movement of the medial border posteriorly

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11
Q

plane of the scapula is approximately … forward of the frontal plane

A

30 degrees

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12
Q

what is the rule for scapulohumeral rhythm

A

2 degrees of shoulder abduction to 1 degree of scapular upward rotation, 2:1

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13
Q

What are the advantages of scapulohumeral rhythm

A

avoids contact of greater tubercles of humerus with acromion process and smaller arthrokenematic motion within the glenohumeral joint are required as the humeral head rotates within the shallow glenoid fossa

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14
Q

sternoclavicular joint

A

between manubrium and clavicle, synovial, only attachment of upper extremity to axial skeleton, triaxial, little osteokenematic motion due to length of lever arm

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15
Q

movements of the SC

A

elevation/depression - frontal plane, sagittal axis
protraction/retraction - horizontal plane, vertical axis
rotation - sagittal plane, frontal axis
only the clavicle moves

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16
Q

posterior sternoclavicular ligament

A

limits anterior motion of clavicle during retraction

17
Q

anterior sternoclavicular ligament

A

limits posterior motion of the clavicle during protraction

18
Q

costoclavicular ligament

A

inferior surface of clavicle to superior surface of Costal cartilage of 1st rib
limits elevation

19
Q

interclavicular ligament

A

connects superior medial ends of clavicle
limits depression

20
Q

acromioclavicular joint

A

acromion of scapula an lateral en of clavicle
synovial
glide joint thus minimal motion

21
Q

acromioclavicular ligament

A

connects lateral end of clavicle to acromion of scapula

22
Q

coracoclavicular ligament

A

connects superior surface of coracoid process to inferior lateral end of clavicle
limits posterior motion and rotation of scapula

23
Q

coracoacromial ligament

A

roof over head of humerus
connects lateral superior surface of coracoid process and inferior surface of acromion
protects head of humerus by limiting superior motion of humeral head when upward force is transmitted along humerus

24
Q

upper traps

A

O - occipital protuberance, nuchal line, spinous of cervical
I - clavical, acromion
A - scapular elevation, upward rotation, retraction, capital and cervical extension, lateral flexion
N - spinal accessory, C3 and C4

25
Q

Middle traps

A

O - spinous process of C7 - T3
I - acromion and spine of scapula
A - scapular retraction, upward rotation
N - spinal accessory, C3 and C4

26
Q

lower traps

A

O - spinous process of T4-T12
I - base of spine of scapular
A - scapular depression, upward rotation, retraction
N - accessory, C3 and C4

27
Q

Levator Scapula

A

O - Transverse C1-C4
I - vertebral border between superior angle and spine of scapula
A - scapular elevation, downward rotation lateral flexion when scapula is stabilized
N - C3, C4, C5

28
Q

Rhomboid

A

O - spinous of C7-T5
I - vertebral border between inferior angle and base of spine
A - Scapular retraction, elevation, downward
N - C5

29
Q

serratus anterior

A

O - lateral surface of 1st-8th rib
I - vertebral border of scapula, anterior surface
A - scapular protraction and upward rotation, elevates thoracic cage when girdle is stabilized, accessory muscle of inhalation
N - long thoracic nerve (C5, C6, C7)

30
Q

Pectoralis minor

A

O - anterior surface, 3-5 rib
I - coracoid process of scapula
A - scapular depression, protraction, downward rotation, tilt, elevates cage when girdle is stable, accessory muscle for inhalation
N - medial pectoralis nerve (C8, T1)

31
Q

What force couple produces upward rotation of the scapula

A

upper trapezius, lower trapezius, serratus anterior

32
Q

What force couple produces downward rotation of the scapula

A

rhomboids, pectoralis minor, levator scapulae

33
Q

acromioclavicular separation

A

separation of the articulation of the acromion process and clavicle

34
Q

clavicular fractures

A

results from imposition of of upward forces through the upper extremity

35
Q

winging

A

serratus anterior is too weak to keep the scapula close to the rib cage

Functional anatomy (9 decks)

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