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ESA2 > MSK - Pectoral Region and bones > Flashcards

MSK - Pectoral Region and bones Flashcards

0
Q

What is the distal attachment of the pectoralis major?

A

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

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1
Q

Name the two proximal attachments of the pectoralis major

A

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

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2
Q

How is the pectoralis major innervated?

A

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.

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3
Q

What is the pectoralis major’s action?

A

To adduct and medially rotate the humerus

Draws scapula anterior and inferior

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4
Q

What is the deltoid muscles proximal attachment?

A

The lateral third of the clavicle

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5
Q

What is the deltoid muscle’s distal attachment?

A

The deltoid tuberosity on the humerus

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6
Q

What is the deltoid muscle’s innervation

A

Axillary nerve (C5,C6)

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7
Q

What is the action of the deltoid?

A

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

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8
Q

Where is the pectoralis minor found?

A

Under the pectoralis major

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9
Q

What is the proximal attachment of the pectoralis minor

A

3rd to 5th ribs

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10
Q

What is the distal attachment of pectoralis minor?

A

The coraciod process on the spacula.

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11
Q

What innervation is present in the pectoralis minor?

A

The medial pectoral nerve (C8, T1)

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12
Q

What is the proximal attachment of the subclavius?

A

The 1st rib

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13
Q

What is the distal attachment of the subclavius?

A

The middle third of the clavicle (inferior surface)

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14
Q

Innervation of the subclavius …

A

Nerve to the subclavius (C5, C6)

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15
Q

What is the action of the subclavius

A

Anchors and depresses clavicle

16
Q

Where is the serratus anterior found?

A

Under the pectoralis minor

17
Q

What is the proximal attachment of the serratus anterior?

A

Ribs 1-8 - lateral parts

18
Q

Where does the serratus anterior attach to (distally)

A

All along the medial border of the spacula

19
Q

What is the innervation of the serratus anterior

A

The long thoracic nerve (C5 C6 C7)

20
Q

What does the serratus anterior do?

A

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

21
Q

What causes winged scapula?

A

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

22
Q

What connects the clavicle to the spacula?

A

The acromioclavicular joint

Joins the clavicle to the acromion of spacula

23
Q

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

A

The jugular notch

24
Q

Where is the greater tubercle found?

A

On the lateral side of the anatomical neck of the humerus

25
Q

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

A

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

26
Q

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

A

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

27
Q

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

A

Intertubular groove

Pectoralis major

28
Q

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

A

The supraspinous fossa

The intraspinous fossa

29
Q

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

A

The subscapular fossa

30
Q

At the base of the humerus …

What are the two epicondyles and where are they situated (anatomical position)

A

Lateral and medial epicondyles
Lateral facing outwards
Medial facing inwards

31
Q

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

A

Trochlea

32
Q

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

A

Capitulum

33
Q

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

A

The ulna

34
Q

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

A

Radius

35
Q

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

A

Trapezium
Trapezoid
Capitate
Hamate

36
Q

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

A

Scaphoid
Lunate
Pisiform
Triquetral

37
Q

What are the carpal bones attached to?

A

The metacarpal bones

38
Q

What do the metacarpals attach to?

A

The phalanges -

Proximal — Middle — distal

ESA2 (38 decks)

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