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PT Anatomy > Dorsal Scapular Region > Flashcards

Dorsal Scapular Region Flashcards

1
Q

Where are the proximal attachments of the DELTOID?

A

Clavicle, Acromion, Spine of scapula

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2
Q

Where are the distal attachments of the DELTOID?

A

deltoid tuberosity of humerus

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3
Q

What nerves innervate the deltoid?

A

Axillary nerve C5, C6

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4
Q

What are the muscle actions of the DELTOID?

A

Clavicular part (anterior): arm flexion, arm IR
Acromial part (middle): arm abduction
Spinal part (posterior): arm extension, arm ER

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5
Q

What are the purposeful activities of the DELTOID?

A

doing yoga poses with arms overhead (all fibers)

reaching for (anterior fibers) and putting on (posterior fibers) a seat belt

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6
Q

What are the purposeful activities of the PECTORALIS MAJOR?

A

reaching across the body into an overhead cabinet, putting on a seatbelt

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7
Q

What are the muscle actions of the PECTORALIS MAJOR?

A

Humerus ADDUCTION
Humerus IR

Scapular PROTRACTION
(draws scapula anteriorly and inferiorly)

Arm HORIZONTAL ADDUCTION

When acting alone:
Clavicula head: Humerus flexion
Sternocostal head: humerus extension from flexed position

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8
Q

What are the proximal attachments of the PECTORALIS MAJOR?

A

Clavicular head: clavicle
Sternocostal head: sternum, costal cartilages 1-6, external oblique muscle

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9
Q

What are the distal attachments of the PECTORALIS MAJOR?

A

lateral lip of intertubercular sulcus of humerus

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10
Q

What nerves innervate the PECTORALIS MAJOR?

A

lateral and medial pectoral nerves; clavicular head (C5, C6), and sternocostal head (C7,C8,T1)

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11
Q

What are the purposeful activities of the PECTORALIS MINOR?

A

Taking a deep breath, walking with crutches

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12
Q

Where are the proximal attachments of the PECTORALIS MINOR?

A

Ribs 3-5 near their costal cartilages

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13
Q

Where is the distal attachment of the PECTORALIS MINOR?

A

coracoid process

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14
Q

What nerves innervate the PECTORALIS MINOR?

A

medial pectoral nerve (C8, T1); lateral pectoral nerve (variable)

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15
Q

What are the muscle actions of the PECTORALIS MINOR?

A

Scapular PROTRACTION
(stabilization by drawing it inferiorly and anteriorly against thoracic wall)

With the scapula fixed…
Assists to ELEVATE the thorax during forced inhalation

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16
Q

What are the 4 rotator cuff muscles?

A

Supraspinatus, infraspinatus, teres minor, subscapularis

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17
Q

What is the purposeful activity of the infraspinatus?

A

playing racket sports or table tennis

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18
Q

What is the proximal attachment of the INFRASPINATUS?

A

infraspinous fossa

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19
Q

Where is the distal attachment of the INFRASPINATUS?

A

greater tubercle of humerus

20
Q

What are the muscle actions of the INFRASPINATUS?

A

Shoulder ER (GHJ)

Stabilize the head of the humerus in the glenoid cavity along with the other SITS muscles

21
Q

What nerve innervates the INFRASPINATUS?

A

suprascapular nerve (C5, C6)

22
Q

Who is “lats little brother”?

A

Teres Major

23
Q

What are the purposeful activities of the TERES MAJOR?

A

Toileting and perineal care

24
Q

What are the muscle actions of the TERES MAJOR?

A

Shoulder adduction
Shoulder IR (GHJ)

25
Q

Where are the proximal attachments of the TERES MAJOR?

A

posterior surface of inferior angle of the scapula

26
Q

Where are the distal attachments of the TERES MAJOR?

A

Medial lip of intertubercular sulcus of humerus

27
Q

What nerve innervates the TERES MAJOR?

A

Lower subscapular nerve (C5, C6)

28
Q

What are the purposeful activities of the SUPRASPINATUS?

A

painting overhead or washing your hair

29
Q

What are the muscle actions of the SUPRASPINATUS?

A

Initiates and assists deltoid in abduction of arm

Stabilizes the head of humerus in glenoid cavity, along with the other SITS muscles

30
Q

Where are the proximal attachments of the SUPRASPINATUS?

A

supraspinous fossa

31
Q

Where is the distal attachment of the SUPRASPINATUS?

A

greater tubercle of humerus

32
Q

What nerves innervate the SUPRASPINATUS?

A

suprascapular nerve C4, C5, C6

33
Q

What are the purposeful activities of the TERES MINOR?

A

washing the back of head and neck

34
Q

What are the muscle actions of the TERES MINOR?

A

Shoulder ER (GHJ)
Stabilize head of humerus in glenoid cavity

35
Q

Where is the proximal attachment of the TERES MINOR?

A

lateral border of the scapula

36
Q

Where is the distal attachment of the TERES MINOR?

A

greater tubercle of humerus

37
Q

What nerves innervate the TERES MINOR?

A

Axillary nerve (C5, C6)

38
Q

What are the purposeful activities of subscapularis?

A

toileting, donning a bra, or throwing a baseball

39
Q

What are the muscle actions of the SUBSCAPULARIS?

A

Shoulder IR

Stabilizes the head of humerus in glenoid cavity

40
Q

Where is the proximal attachment of the subscapularis?

A

subscapular fossa

41
Q

Where is the distal attachment of the SUBSCAPULARIS?

A

lesser tubercle of humerus

42
Q

What nerves innervate the SUBSCAPULARIS?

A

upper and lower subscapular nerves C5, C6, C7

43
Q

What is the purposeful activity of the SERRATUS ANTERIOR?

A

pushing open a heavy door

44
Q

What are the muscle actions of the SERRATUS ANTERIOR?

A

Scapular protraction (ST joint)
Scapular upward rotation
Holds scapular against thoracic wall

45
Q

Where are the proximal attachments of the SERRATUS ANTERIOR?

A

lateral ribs 1-9

46
Q

Where is the distal attachment of the SERRATUS ANTERIOR?

A

medial border of scapular

47
Q

What nerve innervates the SERRATUS ANTERIOR?

A

long thoracic nerve (C5, C6, C7)

PT Anatomy (4 decks)

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