Pectoral Girdle, Scapular Movements and Muscles Flashcards

1
Q

Identify the structures labelled 1-4

A

1- Sternoclavicular joint

2- Clavicle

3- Acromioclavicular joint

4- Scapula

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2
Q

At what joint do the entire upper limb and the pectoral girdle articulate?

A

Glenohumeral joint

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3
Q

Identify the parts of the clavicle labelled 1-3

A

1- Acromial end

2- Coroid tubercle

3- Sternal end

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4
Q

What is the weakest part of the clavicle?

A

The junction between the lateral and middle thirds of the clavicle

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5
Q

What is the function of the conoid tubercle?

A

Attachment point for the conoid ligament which binds the clavicle to the coracoid process of the scapula

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6
Q

Identify structures labelled 1-19

A

1-Supraspinous fossa

2- Superior angle

3- Spine of scapula

4-Acromion

5-Medial border

6-Infraspinous fossa

7-Inferior angle

8-Lateral border

9-Acromion

10- Coracoid process

11- Glenoid cavity

12- Lateral border

13- Superior angle

14- Medial border

15- Subscapular fossa

16- Inferior angle

17- Supraglenoid tubercle

18- Glenoid cavity

19- Infraglenoid tubercle

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7
Q

What types of joints are the acromioclavicular and sternoclavicular joints?

A

Both synovial

AC- Plane

SC- Saddle

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8
Q

At what joints does abduction of the arm occur?

A

From the anatomical position, initially all movements will be at the shoulder joint. Beyong 30 degrees, for every 3 degrees of abduction 2 degrees occurs at the shoulder joint and 1 degree at the scapula-thoracic joint

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9
Q

What is the scapulothoracic joint?

A

The movement of the scapula on the thoracic wall

Not a true anatomical joint, no joint surfaces or structures are present

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10
Q

What muscles are responsible for elevation of the scapula?

A

Descending trapezius

Rhomboids

Levator scapulae

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11
Q

What muscles are responsible for depression of the scapula?

A

Pectoralis minor

Ascending trapezius

Serratus anterior

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12
Q

What muscles are responsible for protraction of the scapula?

A

Serratus anterior

Pectoralis minor

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13
Q

What muscles are responsible for retraction of the scapula?

A

Trapezius (middle fibres)

Rhomboids

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14
Q

What muscles are responsible for lateral rotation of the scapula, elevating the glenoid cavity?

A

Trapezius

Serratus anterior

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15
Q

What muscles are responsible for medial rotation of the scapula, depressing the glenoid cavity?

A

Levator scapulae

Rhomboids

Pectoralis minor

Also gravity

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