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SF1-3 > UL 4 Arm And Scapula > Flashcards

UL 4 Arm And Scapula Flashcards

1
Q

Superficial muscles of the anterior compartment

A

Long head of the biceps brachii
Short head of the biceps brachii
Coracobrachialis

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2
Q

Deep muscle of the anterior compartment

A

Brachialis

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3
Q 
Coracobrachialis
O
I
A
N
A

O: coracoid process of the scapula
I: mid shaft of the humerus
A: weak flexor of the arm at the glenohumeral joint
N: musculocutaneous nerve

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4
Q 
Biceps brachii 
O
I
A
N
A

O: short head=coracoid process of the scapula
Long head: Supra Glenn id tubercle of the scapula
I: bicipital aponeurosis into deep fascia of the forearm and the tendon to the radial tuberosity
A: 1. Powerful flexor of the forearm at the elbow, 2. Powerful supinator of the forearm, 3. Weak flexor of the arm at he glenohumeral joint

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5
Q 
Brachialis
O
I
A
N
A

O: anterior humerous
I: coronoid process of the ulna
A: powerful flexor of the forearm at the elbow joint
N: musculocutaneous nerve

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6
Q 
Triceps brachii
O
I
A
N
A

O:
Long=infraglenoid tubercle of the scapula
Lateral=posterior humerous
Medial=posterior humerous
I: olecranon process of the scapula
A: extension of the forearm the the elbow joint
N: radial nerve

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7
Q

Brachial artery branches in the arm

Proximal to distal

A

Brachial artery->(1) deep brachial artery->(1a) radial collateral artery&(1b) middle collateral artery->(2) superior ulnar collateral artery->(3) inferior ulnar collateral artery

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8
Q

Where can the brachial artery be compressed

A

Can be compressed at the mid arm to control the hemorrhage and the elbow anastomoses will still allow blood flow to the forearm

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9
Q

Nerves to the anterior arm

Musculocutaneous nerve

A

Pierces the coracobrachialis muscle and innervates the anterior compartment muscles

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10
Q

Nerves of the anterior arm

Radial nerve

A

Passes into the anterior arm from the radial groove in the posterior arm

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11
Q

Nerves of the anterior arm

Lateral cutaneous nerve of the forearm

A

Sensory continuation of the musculocutaneous nerve

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12
Q

Nerves of the anterior compartment

Ulnar nerve

A

Ulnar nerve in the posterior compartment of the arm descends posterior to the medial epicondyle (funny bone)

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13
Q

Damage to the radial nerve in the radial groove

A

Results in loss of extension of the hand (wrist drop), but does not significantly effect the extension of the arm at the elbow

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14
Q

Cubical fossa borders
Lateral
Medial
Contents

A

Lateral border: brachiradialis
Medial border: pronator teres
Contents: biceps brachii TENDON, brachial ARTERY, median NERVE
TAN lateral->medial

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15
Q

Arterial anastomoses around the elbow

Medial

A

Radial collateral->radial recurrent artery

Middle collateral artery->interosseus recurrent artery

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16
Q

Arterial anastomoses at the elbow joint

Medial

A

Superior ulnar collateral artery-> posterior ulnar recurrent artery

Inferior ulnar collateral artery-> anterior ulnar recurrent artery

17
Q 
Rotator cuff muscles
Supraspinatus
o
I
A
N
A

O: supraspinous fossa of the scapula
I: greater tubercle of the humerous
A: initiates abduction of the arm and stabilizes the glenohumeral joint
N: suprascapular nerve

18
Q 
Rotator cuff muscles
Infraspinatus
O
I
A
N
A

O: infraspinous fossa of the scapula
I: greater tubercle of the humerous
A: externally rotates the arm and stabilizes the glenohumeral joint
N: suprascapular nerve

19
Q 
Muscles of the rotator cuff
Teres minor
O
I
A
N
A

O: middle lateral border of the scapula
I: greater tubercle of the humerous
A: externally rotates the arm and stabilizes the glenohumeral joint
N: axillary nerve

20
Q 
Muscle of the rotator cuff subscapularis 
O
I
A
N
A

O: subscapular fossa of the scapula
I: lesser tubercle of the humerus (bc its anterior)
A: internally rotates the arm and stabilizes the glenohumeral joint
N: upper and lower subscapular nerves

21
Q 
Teres major
O
I
A
N
A

O: inferior angle of the scapula
I: crest of the lesser tubercle of the humerous
A: internal rotation of the arm, adduction of the arm, extension of the arm
N: lowe subscapular nerve

22
Q 
Deltoid 
O
I
A
N
Strength muscle
A

O:
clavicular part=lateral 1/3 of the clavicle
Acromial part= acromion process of the scapula
Spinal part=spine of the scapula
I: deltoid tuberosity of the humerous
A:
Cavicular part=flexion and internal rotation
Acromial part=abducts arm
Spinal part=extends and external rotation
N: axillary nerve

Test by asking patient to abduct against resistance

23
Q

Sub acromial bursa
Location
Clinical correlate

A

Located between the acromion and the supraspinatus tendon/deltoid muscle

If inflamed, can lead to painful arc syndrome in the 50-130 degree arc because the head of the humerous presses inflamed bursa against the acromion

24
Q

What muscle is responsible for abduction initiation

A

Suraspinatus (initial 15 degrees)

25
Q

What muscle is responsible for abduction in the horizontal plane

A

The deltoid (15-120)

26
Q

What muscles are responsible for raising the upper limb over the head

A

Serratus anterior and the trapezius

27
Q

Supraspinatus tendon

Clinical correlation

A

Most commonly torn tendon of the rotator cuff evading to an inability to initiate abduction of the arm

Commonly inflamed in the elderly and can have calcium deposits leading to adhesion to the sub acromial bursa/joint capsule

28
Q

Quadrangular space
Borders
Contents
Function

A

Borders: teres minor, teres major, long head of the triceps, surgical neck of the humerous
Contents: axillary nerve and posterior circumflex humeral artery
Function: allows for passage of the nerovascular supply from the axilla to the posterior scapular and arm regions

29
Q

Axillary nerve damage
How it can happen
Results of it happening

A

How: break in the surgical neck of the humerous or inferior disclocation of the head of the humerous
Results: weakened abduction of the arm (15-120 degrees)+ loss of the cutaneous nerve innervation to the upper lateral arm

30
Q

Triangular interval
Borders
Function

A

Borders: teres major, long and lateral head of the triceps brachii

Function: allows for passage of the radial nerve and deep artery of the arm to radial groove in the posterior arm

31
Q

Arterial anastomoses of the shoulder

A

Thyrocervical trunk of the subclaivan possesses the transverse cervical artery/suprascapular artery which anastomoses with the subscapular artery from the 3rd portion of the axillary artery

SF1-3 (6 decks)

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