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LECOM MS1 Gross Anatomy > Scapular Region (Exam 1) > Flashcards

Scapular Region (Exam 1) Flashcards

1
Q

List the joints of the shoulder girdle

A

Sternoclavicular–the only “true” joint between shoulder and upper limb

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2
Q

We reduce what for range of motion

A

sacrifice stability

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3
Q

How is the axilla related to the bones in the shoulder girdle?

A

area between scapula and ribs

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4
Q

What ligament is damaged if there is acromioclavicular joint separation

A

acromioclavicular ligament

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5
Q

What ligaments are damaged for complete separation

A

acromiocalvicular and coracoclavicular ligaments

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6
Q

What is the function of the coracoclavicular ligament

A

anchors clavicle to the scapula

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7
Q

What are the three features of a synovial joint

A

articular cartilage
synovial membrane
fibrous capsule

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8
Q

What part of the scapula will the head of the humerus articulate with

A

glenoid fossa

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9
Q

What muscle will have a tendon that runs through the shoulder

A

long head of biceps brachii

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10
Q

What are the mechanisms to increase stability in the shoulder

A

thickening of joint capsule

long head of the biceps tendon

superior middle and inferior glenohumeral ligament

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11
Q

What lines the cavity of the glenohumeral joint

A

synovial sheath

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12
Q

What type of joint is the glenohumeral joint

A

synovial ball and socket

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13
Q

What types of movements does the glenohumeral joint allow

A

wide range of motion

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14
Q

What muscles compose the rotator cuff

A

supraspinalis
infraspinalis
teres minor
subscapularis

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15
Q

What is the function of rotator cuff muscles

A

maintain joint stability by maintaining head of humerus on the glenoid

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16
Q

How does the trapezius affect the shoulder

A

important in rotation of scapula

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17
Q

What is the action of latissimus dorse

A

adduct arm, extension, medial rotation

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18
Q

What is the action, innervation, attachments, and blood supply to the deltoid muscles

A

Attachments: Lateral 1/3 acromion scapular spine, inferior to the deltoid tuberosity

Action: Abduct flex extend medial lateral rotate at glenoid humerus shoulder joint

Innervation: Axillary nerve C5-C6

Blood supply: acromial and deltoid branch of thoracoacromial artery

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19
Q

What are the actions of the rotator cuff muscles

A

Supraspinatis: first 15 degrees of abduction
deltoid picks up after 15

Infraspinatus: lateral rotation

Teres minor: Lateral rotation

20
Q

What nerves are the rotator cuff muscles innervated by

A

suprascapular nerve

axillary nerve

21
Q

What are attachments of supraspinatus

A

supraspinous fossa to greater tubercle of humerus

22
Q

What are the attachments of infraspinatus

A

infraspinous process to greater tubercle

23
Q

What are the attachments of teres minor

A

lateral border of scapula to greater tubercle of humerus

24
Q

What are the attachments of subscapularis

A

subscapular fossa to greater tubercle of huemrus

25
Q

What muscles are innervated by the dorsal scapular nerves

A

levator scapulae
rhomboid minor
rhomboid major

26
Q

What is the action, innervation, and attachments of serratus anterior

A

Protracts scapula, helps with abduction above 90 degrees

Long thoracic nerve

Medial border of scapula to ribs

27
Q

What is unique about the innervation of serratus anterior

A

innervated on superifical suface unlike other muscles

28
Q

What is a risk of the long thoracic nerve

A

if someone gets punched or shanked it is at risk

29
Q

What procedure is the long thoracic nerve at risk

A

axillary lymph node removal

30
Q

What can be seen if the long thoracic nerve is damaged

A

weakness in protraction of the shoulder

31
Q

What is most likely the cause of scapular winging

A

serratus anterior paralysis

place forearm on wall and push

cannot hold the scapula against the ribs

32
Q

What are the scapular areas

A

Quadrangular space
Triangular space
Triangular interval

33
Q

What is in the quadrangular space

A

axillary nn

posterior circumflex humeral artery

34
Q

What are the borders of the quadrangular space

A

Superior teres minor
Inferior teres major
medial: triceps brachii long head
lateral: humerus

35
Q

What are the borders of the triangular space

A

inferior teres major
superior teres minor
lateral long head of triceps

36
Q

What is found in the triangular space

A

circumflex scapular artery

37
Q

What are the borders of the triangular interval

A

lateral humerus
medial triceps head long
superior teres minor

38
Q

What is found in the triangular interval

A

profunda brachial artery

radial nn

39
Q

How will the suprascapular nerve and artery relate to the transverse scapular ligament

A

artery goes over ligament

nerve goes under ligament

40
Q

What vasculature is contributed to the shoulder from the subclavian artery

A

thyrocervical trunk: transverse or superficial cervical

suprascapular arteries

41
Q

Where does the circumflex scapular artery originate from

A

Subscapular artery off the axillary artery

42
Q

Where does the posterior circumflex humeral artery originate from

A

axillary artery

43
Q

What are the main anastamoses seen in the shoulder

A

deep branch of transverse cervical

suprascapular

44
Q

What anastomoses occur with the deep branch of transverse cervical

A

subscapular artery and subclavian vein

45
Q

When the axillary artery is clamped, what can still provide blood to the limb

A

the deep branch of transcerse cervical artery

46
Q

What anastomoses occur with the suprascapular

A

with the subscapular and deep branch of transverse cervical

LECOM MS1 Gross Anatomy (12 decks)

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