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PT602 > Scapular and Deltoid Regions ROTATOR CUFF > Flashcards

Scapular and Deltoid Regions ROTATOR CUFF Flashcards

(72 cards)

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1
Q

Shoulder Region

A

where the upper limb attaches to the trunk

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2
Q

comprised of the:

A

clavicle, scapula, and proximal humerus

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3
Q

includes:

A

superficial back muscles that attach to and move the humerus

extrinsic and intrinsic muscles

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4
Q

superficial extrinsic Back and Shoulder

A

trapezius
latissimus dorsi
deltoid

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5
Q

Trapezius Origin

A

superior nuchal line
external occipital protuberance
ligamentum nuchae
C7-T12 spinous processes

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6
Q

Trapezius

Insertion

A

lateral 1/3 of clavicle
acromion
scapular spine
(origin for deltoid)

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7
Q

Trapezius

innervation

A

NOT INNERVATED BY the BRACHIAL PLEXUS
spinal portion of accessory nerve CN 11 (motor only)
ventral rami C3-C4 (sensory only)

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8
Q

Trapezius

Functions

A

upper fibers: elevate scapula
lower fibers: depress scapula
together: upwardly rotate scapula (with serratus)
middle: retract scapula

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9
Q

Latissimus Dorsi

origin

A

T7-T12 spinous processes
ribs 9-12
thoracolumbar fascia
iliac crest

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10
Q

Latissimus Dorsi

insertion

A

floor of inter tubercular groove of humerus

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11
Q

Latissiums Dorsi

innervation

A

Thoracodorsal nerve

ventral rami C6-C8

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12
Q

Latissiums Dorsi

Functions

A

medially rotates
extends
adducts humerus at the shoulder joint

fixed insert: raise body towards upper trunk as in hoisting the body

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13
Q

Deltoid

Origin

A
  1. lateral 1/3rd of clavicle
  2. acromion
  3. scapular spine
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14
Q

Deltoid

Inserts

A

convergent tendon into the deltoid tuberosity of humerus

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15
Q

Deltoid

innervation

A

axilary nerve C5-C6

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16
Q

Deltoid

Functions

A

Chief humeral ABductor (following initiation of abduction by the supraspinatus muscle; after about 15-20 deg flexion)

  1. Anterior: chief humeral flexor and medially rotates humerus
  2. Posterior: extends and laterally rotates humerus
  3. Middle: primary ABductor of humerus
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17
Q

Extrinsic Shoulder Muscles are:

A

Rhomboids

Levator Scapulae

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18
Q

Rhomboids Major

Origin

A

spions processes of T2-T5

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19
Q

Rhomboids Minor

Origin

A

spinous processes of C7-T1

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20
Q

Rhomboids Together Insertion

A

together along the medial border of the scapula from scapular spine to interior angle

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21
Q

Rhomboids

innervation

A

dorsal scapular nerve

C5

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22
Q

Rhomboids

functions

A 
scapular retraction (squeeze shoulder blades together)
downward rotation of the scapula
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23
Q

Levator Scapulae

Origin

A

posterior tubercules of transverse processes C1-C4

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24
Q

Levator Scapulae

Insert

A

superior angle and upper medial border of scapula

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25
Levator Scapulae | innervation
ventral rami C3-C4 | dorsal scapular nerve C5
26
Levator Scapulae | Functions
scapular elevation downward rotation of scapula Reverse actions: fixed scapula: lateral flexion of cervical spine to ipsilateral contraction billaterally assists is extension of the cervical spine
27
Intrinsic Shoulder Muscles:
originate off the scapula and insert on the humerus SITS muscles: Rotator Cuff Teres Major
28
Rotator Cuff Muscles
Supraspinatus Infraspinatus Teres Minor Subscapularis
29
Supraspinatus | origin
supraspinous fossa of scapula
30
Supraspinatus | inserts
superior facet of greater tubercule of humerus
31
Supraspinatus | innervation
not sure yet
32
Supraspinatus | functions
initiates first 15-20 degrees of humeral ABduction
33
Infraspinatus | origin
infraspinous fossa of scapula
34
Infraspinatus | inserts
middle facet of greater tubercle of humerus
35
Infraspinatus | innervation
Suprascapular nerve
36
Infraspinatus | functions
external rotation of humerus
37
Teres Minor | Origin
teres minor fossa of scapula
38
Teres Minor inserts INNERvation
interior facets of greater tubercle of humerus axillary nerve C5-C6
39
Teres Minor | functions
external rotation of humerus
40
Subscapularis | origin
Subscapular fossa of scapula
41
Subscapularis | inserts
lesser tubercle of humerus
42
Subscapularis | innervation
upper and lower subscapularis nerves
43
Subscapularis | functions
internal rotation of humerus | ADduction of the humerus
44
Teres Major | origin
posterior surface of interior angle of scapula
45
Teres Major | inserts
meidal lip or crest of inter tubercular groove of humerus
46
Teres Major | innervation
lower subscapular nerve | C5-C7
47
Teres Major | function
extension ADductions Medial rotation of humerus
48
humeral ADduction mechanics
large deltoid force plus smaller supraspinous force equals translation of the humeral head superiorly
49
prevention of humeral head from being driven to the coracoacromial arch and creating impingement
1.Subscap 2. infraspinatus 3. teres minor exert downward translational force on humeral head together maintain normal positioning for humeral head during ABduction and prevent impingement
50
Trapezius muscle is innervated by:
cranial nerve 11 (spinal portion of accessory nerve) brachial motor to the muscle Ventral rami C3-C4 convey sensory info from muscle to CNS
51
thoracodorsal nerve formed: derives from: innervates:
by ventral rami C6-C8 posterior cord of the brachial plexus Latissimus Dorsi
52
Axillary nerve is:
``` C5-C6 terminal branch of the posterior cord of the brachial plexus runs posteriorly through axilla inferior to humeral head exits the quadrangular space ```
53
Axillary nerve supplies
teres minor first | then deltoid
54
Axillary terminates as:
cutaneous nerve upper lateral brachial cutaneous nerve supplies skin upper lateral arm
55
Suprascapular nerve | innervates:
``` C5-C6 supraspinatus first runs around scapular notch to infraspinatus runs posteriorly and inferior to the transverse scapular ligament ```
56
Suprascapular nerves orginiates and goes to:
upper superior trunk of brachial plexus | goes to transverse scapular ligament
57
Upper and Lower Subscapular nerves supply:
C5-C7 Subscapularis Teres Major derive from posterior cord of brachial plexus
58
blood to Trapezius
transverse cervical artery | branch of subclavian artery
59
blood to supraspinatus and infraspinatus
suprascapular artery over transverse ligament and suprascapular nerve goes under transverse ligament (branch of subclavian artery)
60
Suprascapular artery travels:
with suprascapular nerve under the transverse scapular ligament to supply muslces: supraspinatus and infraspinatus
61
posterior humeral circumflex artery | supplies and travels:
(branch of axillary artery) supplies: teres minor & deltoid travels: with axillary nerve to exit quadrangular space
62
Subscapular artery supplies:
(LARGEST branch of axillary artery) latissimus dorsi teres major
63
Collateral Circulation of dorsal scapular region:
see the next three cards
64
Supraspinous fossa supplied by:
suprascapular artery
65
Infraspinous fossa supplied by:
1. dorsal scapular artery (transverse cervical) 2. suprascapular artery 3. circumflex scapular artery
66
Significance of Collateral Circulation of dorsal scapular region:
supraspinatus tendon frequently impinged in coracoacromial arch tendons have poor blood supply may be a factor affecting the capacity of muscle to repair following trauma or surgery
67
extrinsic muscles
originate somewhere else and insert in the area
68
intrinsic muscles
originate in the area and insert in the area
69
superior quadrangular space
teres minor | subscap
70
posterior quadrangular space
teres major
71
medial border of quadrangular space
long head of triceps
72
lateral border of quadrangular space
surgical neck of the humerus

PT602 (15 decks)

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