MSK - Pectoral Region and bones

Question 0

What is the distal attachment of the pectoralis major?

Answer 0

The pectoralis major distally attaches to the lateral lip of the intertubercular groove of the humerus

Question 1

Name the two proximal attachments of the pectoralis major

Answer 1

The clavicular head attaches to the medial ha,f of the clavicle
The sternocostal head is attached to the anterior of the sternum

Question 2

How is the pectoralis major innervated?

Answer 2

By the lateral (C7,C8, T1) and medial (C5,C6) pectoral nerves
The lateral nerve provides motor input to the clavicular head
The medial nerve provides motor input to the sternal head.

Question 3

What is the pectoralis major’s action?

Answer 3

To adduct and medially rotate the humerus

Draws scapula anterior and inferior

Question 4

What is the deltoid muscles proximal attachment?

Answer 4

The lateral third of the clavicle

Question 5

What is the deltoid muscle’s distal attachment?

Answer 5

The deltoid tuberosity on the humerus

Question 6

What is the deltoid muscle’s innervation

Answer 6

Axillary nerve (C5,C6)

Question 7

What is the action of the deltoid?

Answer 7

Clavicular part flexes and medially rotates arm
Acromial part abducts arm
The posterior part extends and laterally rotates arm

Question 8

Where is the pectoralis minor found?

Answer 8

Under the pectoralis major

Question 9

What is the proximal attachment of the pectoralis minor

Answer 9

3rd to 5th ribs

Question 10

What is the distal attachment of pectoralis minor?

Answer 10

The coraciod process on the spacula.

Question 11

What innervation is present in the pectoralis minor?

Answer 11

The medial pectoral nerve (C8, T1)

Question 12

What is the proximal attachment of the subclavius?

Answer 12

The 1st rib

Question 13

What is the distal attachment of the subclavius?

Answer 13

The middle third of the clavicle (inferior surface)

Question 14

Innervation of the subclavius …

Answer 14

Nerve to the subclavius (C5, C6)

Question 15

What is the action of the subclavius

Answer 15

Anchors and depresses clavicle

Question 16

Where is the serratus anterior found?

Answer 16

Under the pectoralis minor

Question 17

What is the proximal attachment of the serratus anterior?

Answer 17

Ribs 1-8 - lateral parts

Question 18

Where does the serratus anterior attach to (distally)

Answer 18

All along the medial border of the spacula

Question 19

What is the innervation of the serratus anterior

Answer 19

The long thoracic nerve (C5 C6 C7)

Question 20

What does the serratus anterior do?

Answer 20

Pulls the spacula in against the thoracic wall
Assists in upwards rotation
Protracts and stabilises spacula

Question 21

What causes winged scapula?

Answer 21

Serratus anterior paralysis usually caused by damaged to the long thoracic nerve.

Question 22

What connects the clavicle to the spacula?

Answer 22

The acromioclavicular joint

Joins the clavicle to the acromion of spacula

Question 23

What is the elevated sternal ends of the clavicle called in surface anatomy?

Answer 23

The jugular notch

Question 24

Where is the greater tubercle found?

Answer 24

On the lateral side of the anatomical neck of the humerus

Question 25

What is the articulating surface of the humerus and the spacula called?

Answer 25

Glenoid cavity on the spacula forms the glenohumeral joint with the head of the humerus

Question 26

What is the difference between the anatomical neck of the humerus and the surgical neck?

Answer 26

The anatomical neck is the widest part whilst the surgical neck is narrower and most common sit of fracture.

Question 27

What is groove called running inbetween the greater tubercle and the lesser tubercule? And what muscle attaches here?

Answer 27

Intertubular groove Pectoralis major

Question 28

Viewing the posterior spacula... What is the area above the spine of the spacula referred to as? What is the area below?

Answer 28

The supraspinous fossa The intraspinous fossa

Question 29

Viewing the anterior spacula what is the main fossa referred to as?

Answer 29

The subscapular fossa

Question 30

At the base of the humerus ... | What are the two epicondyles and where are they situated (anatomical position)

Answer 30

Lateral and medial epicondyles Lateral facing outwards Medial facing inwards

Question 31

What is the name of the groove under the medial epicondyle that attached to the ulna?

Answer 31

Trochlea

Question 32

What is the name of the groove under the lateral epicondyle that attaches to the radius?

Answer 32

Capitulum

Question 33

What bone forms the majority of the joint with the humerus?

Answer 33

The ulna

Question 34

Which bone forms the majority of the joint with the carpal bones in the wrist?

Answer 34

Radius

Question 35

Name the 4 top layer carpal bones (from thumb - anatomical position)

Answer 35

Trapezium Trapezoid Capitate Hamate

Question 36

Name the 4 bottom layer carpal bones (from thumb side)

Answer 36

Scaphoid Lunate Pisiform Triquetral

Question 37

What are the carpal bones attached to?

Answer 37

The metacarpal bones

Question 38

What do the metacarpals attach to?

Answer 38

The phalanges - | Proximal --- Middle --- distal