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BIO 2300 Unit 3 > UL Concept D > Flashcards

UL Concept D Flashcards

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Biology 101 flashcards
1
Q

What are the 3 articulations of the shoulder area?

A

Sternoclavicular
Scapuloclavicular (acromioclavicular)
Glenohumeral

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2
Q

What are the 3 articulations of the elbow and forearm area?

A

Humeroulnar
Humeroradial
Radioulnar (proximal)

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3
Q

What are the 2 articulations of the wrist area?

A

Radiocarpal

Radioulnar (distal)

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4
Q

Attributes of sternoclavicular joint are…

A

Extremely strong

Remains mobile

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5
Q

Is scapuloclavicular joint weak or strong?

A

Weak

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6
Q

What reinforces scapuloclavicular joint?

A

Trapezius muscle fibers

More importantly, the coracoclavicular ligament

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7
Q

Attribute of coracoclavicular ligament is…

A

It’s the main stabiliser backed with clavicle and scapula.

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8
Q

Function of coracoacromial arch/ligament is…

A

Prevent superior dislocation of head of humerus.

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9
Q

What articulates for glenohumeral ligament?

A

Glenoid cavity of scapula and head of humerus.

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10
Q

What is the structure that surrounds the glenoid cavity to create a bit if a deeper socket?

A

Glenoid labrum

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11
Q

What are the ligaments that attaches the actual shoulder joint called?

A

Glenohumeral ligaments

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12
Q

Where do glenohumeral ligaments attach from/to?

A

Margin of glenoid cavity and labrum to anatomical neck of humerus

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13
Q

Shoulder joint loose or strong?

A

Loose

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14
Q

Why is the shoulder joint weak inferiorly?

A

No rotator cuff
Laced when arm is adducted
Prone to dislocation

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15
Q

The glenohumeral joint capsule is lined by…

A

Synovial membrane

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16
Q

The articular surface of glenohumeral joint is…

A

Hyaline cartilage

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17
Q

What are some muscle actions at the shoulder?

A

Abduction
Flexors
Extensors

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18
Q

Which muscle initiates abduction? Which muscle is the primary abductor?

A

Supraspinatus

Deltoid

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19
Q

Is the fibrous elbow capsule weak?

A

Yes

20
Q

What strengthens elbow fibrous capsule?

A

Lateral and medial collateral ligaments.

21
Q

What are the 2 articulations at the elbow?

A

Humeroulnar

Humeroradial

22
Q

What are the articulations of humeroulnar?

A

Trochlea of ulna

Trochlear notch of humerus

23
Q

What are the articulations of humeroradial joint?

A

Capitulum of humerus and head of radius

24
Q

What is humeroradial joint reinforced by?

A

Anular ligament

25
Q

What ligament helps with pronation and supination?

A

Anular ligament

26
Q

For the ulnahumeral joint, which flexors cross Anteriorly?

A

Brachialis
Biceps brachii
Brachiradialis

27
Q

For the ulnahumeral joint, which extensors cross posteriorly?

A

Triceps brachii

28
Q

Brachialis flexes (anteriorly to ulnahumeral joint)…

A

In all positions

29
Q

Biceps brachii flexes (anteriorly to ulnahumeral joint)…

A

Supinated

30
Q

Brachioradialis flexes (anteriorly to ulnahumeral joint)…

A

Mid-pronated

31
Q

What actions are permitted with radiohumeral joint?

A

Flexion/extension

Pronation/supination

32
Q

What muscle causes pronation at radiohumeral

Joint?

A

Pronator teres

33
Q

What muscle causes supination at radiohumeral

Joint?

A

Biceps brachii

34
Q

What are the 3 joints of the forearm?

A

Proximal
Distal
Interosseous membrane

35
Q

What action does Proximal joint, Distal joint, and

Interosseous membrane at forearm support?

A

Pronation and supination

36
Q

What bones participate in radiocarpal joint?

A

Scaphoid
Lunate
Triquetreum
& Radius

37
Q

What bone doesn’t participate in radiocarpal joint?

A

Ulna

38
Q

What is ulna and radiocarpal joint excluded by?

A

Fibrocartilaginous disc

39
Q

What are the supporting ligaments of radiocarpal joint?

A

Radial collateral

Ulnar collateral

40
Q

What does radial collateral do?

A

Limits adduction

41
Q

What does ulnar collateral do?

A

Limits abduction

42
Q

What action does radiocarpal joint permit?

A

Flexion/ extension
Adduction
Abduction

43
Q

What causes flexion of radiocarpal joint?

A

Flexors (carpi’s, of digits)

Palmaris longus

44
Q

What causes extension of radiocarpal joint?

A

Extensors (carpi’s, of digits)

45
Q

What causes adduction of radiocarpal joint?

A

Extensor and flexor carpi ulnaris

46
Q

What causes abduction(to undo adduction) of radiocarpal joint?

A

Extensor and flexor carpi radialis

BIO 2300 Unit 3 (8 decks)

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