Pectoral and Scapular Regions Flashcards

1
Q

How many muscles make up the pectoral region

A

4

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2
Q

what muscle moves the clavicle (pectoral region)

A

subcalvius - C5,6

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3
Q

What muscle moves the humorous (pectoral region)

A

pectoralis major - medial (C8,T1) and lateral pectoral (c5,6,7)

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4
Q

what muscles move the scapula (pectoral region)

A

pectoralis minor - medial pectoral nerve (C8,T1)

serrates anterior - long thoracic nerve (C5,6,7)

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5
Q

pectoralis major

A

2 heads
adducts
medially rotates

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6
Q

pectoralis minor

A

stabilises/depresses scapulas

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7
Q

subclavius

A

stabilises/depresses clavicle

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8
Q

serratus anterior

A

protracts

prevents winging scapular rotation

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9
Q

what muscle moves the humorous (extrinsic back muscles)

A

lattissimus dorsi - thoracodorsal nerve (C6,7,8)

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10
Q

what muscles move the scapula (extrinsic back muscles)

A

trapezius - spinal accessory
rhomboids (major and minor) - dorsal scapular nerve (C3,4)
levator scapula - cervical nerves (C3,4) dorsal scapular (c4,5)

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11
Q

latissimus dorsi

A

action at GH joint
extends
adducts
medially rotates

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12
Q

prime mover in elevation/depression of scapula

A

upper trapezius and gravity

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13
Q

prime mover in protraction and retraction

A

serratus anterior and middle trapezius

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14
Q

prime mover for upward rotation and downward rotation

A

upper trapezius and serratus anterior

latissimus dorsi

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15
Q

nerves that supply the deltoid

A

axillary nerve (C5,6)

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16
Q

nerves that supply the tires major

A

lower sub scapular nerve (c5,6)

17
Q

what are the three functional parts of the deltoid

A
anterior (clavicular)
-flexion
-medial rotation
middle (acromial)
-abduction
posterior (spinal) 
-extension 
-lateral rotation
18
Q

function of trees major

A

adduction and medial rotation

19
Q

what are the three muscles of the rotator cuff - holds the humeral head in the glenoid fossa

A

– Supraspinatus – Suprascapular Nerve (C4,5,6)
– Infraspinatus – Suprascapular Nerve (C5,6)
– Teres Minor – Axillary nerve (C5,6)
– Subscapularis – U and L Subscapular nerves (C5,6,7)

20
Q

actions of the rotator cuff

A
initial abduction (15 degrees) SUPRASPINATUS
external rotation INFRASPINATUS
internal rotation SUBSCAPULARIS
21
Q

Elements of stability of the glenohumeral joint

A
  • 3 insert on greater tuberosity
  • 1 On to lesser tuberosity
  • Surround humeral head
  • Supraspinatus runs beneath acromion
  • Subacromial bursa • Inflation
  • impingement
22
Q

what are the three arm muscles which cross the GH JOINT

A

– Long head of Biceps Brachii
– Corocobrachialis
– Long head of triceps

23
Q

what fascia is around the pectoral minor

A

clavipectoral

24
Q

Infraspinatus and

Supraspinatus fascia

A
  • Origin of the muscles

* Really dense

25
Q

spaces in the scapular region

A

– Connect axilla to posterior of limb
– Quadrangualr space
– Triangular Space upper
– Triangular Interval lower

26
Q

what are the contents of the axilla

A
  • Axillary vessels
  • Brachial Plexus
  • Cords and branches • Axillary Sheath
  • From prevertebral fascia
27
Q

what are the 5 groups od lymph nodes

A
anterior 
lateral 
posterior
central 
apical
28
Q

borders of the quadrangular space

A

teres minor
teres major
humorous
long head of triceps

29
Q

contents of the scapular Spaces

A

• Posterior Circumflex
Humeral Artery
• Axillary nerve
• (Surgical neck of Humerus)

30
Q

Triangular space (upper triangular space) borders

A
  • Teres Minor
  • Teres Major
  • Long Head of Triceps
31
Q

Triangular space (upper triangular space) contents

A
  • Circumflex Scapular artery

* Leads to scapular anastomosis

32
Q

• Triangular interval (lower triangular space) borders

A
  • Lateral head of Triceps
  • Long Head of Triceps
  • Teres Major
33
Q

Triangular interval (lower triangular space) contents

A
  • Radial nerve
  • Profunda Brachii artery
  • Leads to spiral groove