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Functional Anatomy > Week 7 - pectoral girdle > Flashcards

Week 7 - pectoral girdle Flashcards

1
Q

3 parts of the trapezius muscle

A

Descending (superior)
Transverse
Ascending (inferior)

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2
Q

What does the descending part of the trapezius do

A

Retraction of the scapula
Elevation of the scapula

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3
Q

Movements of the transverse part of the trapezius

A

Retraction of the scapula
Elevation of the scapula

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4
Q

Movements of the ascending part of the trapzius

A

Retraction of the scapula
Depression of the shoulder

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5
Q

Levator scapulae

A

Connects the scapula with the spine
Deeper than the trapezius
Helps elevate the scapula

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6
Q

The Rhomboids (rhomboid minor and rhomboid major)

A

Connect the scapula with the spine from the medial border of the scapula

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7
Q

If the rhomboids major and minor contract together, what movement happens

A

Retraction of the scapula

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8
Q

Role of the subclavius

A

Stabilises the pectoral girdle during the movements of the glenohumeral joint

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9
Q

Actions of the pectoralis minor

A

Protraction of scapula and depression of shoulder

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10
Q

Actions of the pectoralis major

A

Shoulder depression

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11
Q

Actions of the serratus anterior

A

Protraction of the scapula

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12
Q

Similarities and differences between the pelvic and pectoral girdle

A

The bones involved articulate with each other
There is a gap in the pectoral girdle not found in the pelvic girdle

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13
Q

Bones in the pectoral girdle

A

Clavicle
Scapula
Sternum

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14
Q

Where is the gap located in the pectoral girdle and what does it do

A

Between the two scapula
Gives great mobility

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15
Q

What provides the closing of the girdle

A

The rhomboids

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16
Q

Pectoral girdle joints
3 true joints
2 other joints

A

Sternoclavicular joint (SCJ)
Acromioclavicular joint (ACJ)
Glenohumeral joint (GJ)

2 other:
scapulothoracic articulation
subacromial articulation

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17
Q

Sternoclavicular joint

A

Made of the articular surface of the manubrium of the sternum and the lateral surface clavicle articulates with the acromion of the scapula

18
Q

Why is the shape of the clavicle important

A

The S shaped clavicle allows for 180 degrees of movement at shoulder

19
Q

Articulation between the humerus and the scapula

A

Glenoid fossa

20
Q

Where does the anterior aspect of the scapula articulate to
What does this provide

A

The thorax
Allows the scapuls to slide along the thorax - great mobility

21
Q

Most prominent area of the scapula in the posterior view
What does it do

A

The spine of the scapula
Divides the posterior aspect of the scapula into the supraspinous and infraspinous fossae

22
Q

Where is the suprascapular fossa

A

Large area on the anterior side of scapula

23
Q

Where is the coracoid process

A

Superior aspect of scapula
Provides attatchment for ligaments and tendons

24
Q

Features of the sternoclavicular joint

A

The articular disc - located on the sternum - where the clavicle connects to
Anterior sternoclavicular ligament - connects the sternum and clavicle
Interclavicular ligament - passes superiorly to the anterior sternoclavicular ligament
Posterior sternoclavicular ligament
Costoclavicular ligament - goes from cartilage of first rib to the clavicle

25
Q

Features of the acromioclavicular joint

A

Disc - provides mobility
Acromioclavicular ligament - formed by cap of shoulder and collar bone - allows continuation of the clavicle
Trapezoid ligament - connects the coracoid process of the scapula to the trapezoid line
Conoid ligament

26
Q

Glenohumeral joint

A

Labrum - provides stability for the humerus (surrounds the glenoid fossa)
Joint capsule - connects glenoid fossa to the ligaments
Tendon of the long head of the biceps brachii (stabilises humerus during elevation)
Transverse humeral ligament - overlying the tendon of biceps as it emerges from capsule of shoulder joint
Superior, medial, inferior glenohumeral ligament
Coracohumeral ligament - extracapsular
Conicoachronium ligament - reinforces the conico achronium arch. Acts as a roof for the movement of humerus
Several bursae - provides lubrication

27
Q

Elevation and depression of the scapula

A

Elevation is the scapula gliding superiorly (shoulders up)
Depression is the scapula gliding inferiorly (shoulders down)

28
Q

Protraction and retraction of the scapula

A

Protraction (or abduction) is when medial border of scapula moves away from spine
Retraction (or adduction) is the opposite (arms behind your back)

29
Q

Upward and downward rotation of the scapula

A

Upward is abduction of the shoulder - inferior angle of scapula moves further away from midline
Downward is adduction of shoulder

30
Q

Movements at the glenohumeral joint

A

Flexion
Extension
Lateral rotation
medial rotation
Abduction
Adduction
Circumduction

31
Q

Scaption

A

Scpation is movements that keep the scapula in its resting position

32
Q

How does the shoulder move 180 degrees

A

60 degree rotation of scapulothoracic joint
30 degree elevation of sternoclavicular joint
120 degree abduction of glenohumeral joint

33
Q

Role and location of the intertubercular groove

A

On the humerus, separates the greater and lesser tubercle. It allows for the long tendon of the biceps brachii muscle to pass

34
Q

Role and location of the deltoid tuberosity

A

Lies proximally about a third of the way to the elbow
Provides attachment for the deltoid

35
Q

Muscles that create abduction

A

Middle deltoid and supraspinatus

36
Q

Muscles that create adduction

A

Latissimus dorsi, teres major, coracobrachialis, pectoralis major

37
Q

Muscles that create flexion at the shoulder

A

Anterior deltoid, pectoralis major, biceps brachii, coracobrachialis

38
Q

Muscles that create extension at the shoulder

A

Posterior deltoid, LD, long head of triceps brachii

39
Q

Muscles that create medial rotation at the shoulder

A

LD, subscapularis, pectoralis major, anterior deltoid

40
Q

Muscles that create lateral rotation

A

Infraspinatus, teres major, posterior deltoid

41
Q

Muscles that make up the rotator cuff

A

Supraspinatus, infraspinatus, teres minor, subscapularis

42
Q

Insertion point of the rotator cuff muscles

A

The head of the humerus

Functional Anatomy (11 decks)

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