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Anatomy 2nd Half > Shoulder > Flashcards

Shoulder Flashcards

1
Q

Pectoralis major

A

O: clavicular head - medial half clavicle
Sternocostal head - anterior surface of sternum and costal cartilage of the first 6-7ribs
Abdominal head - integrate with external oblique muscles
I: lateral lip of intertubercular groove
F: flexion, adduction, medial rotation
Clavicular head: flex an extended arm
Sternocostal head: extend a flexed arm
Reverse function: expand chest for inhalation
I: medial and lateral pectoral nerves

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2
Q

Pectoralis minor

A

O: anterior surface of ribs 3-5
I: coracoid process
I: medial pectoral nerve
F: produces downward rotation and protraction

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3
Q

Subclavius

A

O: superior first rib and costal cartilage
I: subclavius groove
I: direct branch of brachial plexus
F: pulls tip of shoulder down, stabilizes sternoclavicular by pulling clavicle medially, posterior axial rotation (after 90 degrees of abduction and flexion)

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4
Q

Deltoid

A

O: spine of scap, lateral margin of acromion and lateral 1/3 clavicle
I: deltoid tuberosity
I: axillary nerve
F: prime mover abduction between 30-90 degrees

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5
Q

Supraspinatus

A

O: suprspinus fossa
I: greater tubercle superior aspect
I: suprascapular nerve
F: prime mover abduction first 15-30degrees

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6
Q

Infraspinatus

A

O: infraspinus fossa
I: posterior surface greater tubercle
I: suprascapular nerve
F: prime mover lateral rotation

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7
Q

Teres minor

A

O: lower 2/3 lateral border of scapular
I: posterior surface of greater tubercle
I: axillary nerve
F: lateral rotation and adduction

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8
Q

Teres major

A

O: posterior surface of inferior scap angle
I: medial lip intertubercular groove
I: lower subscapular nerve
F: medial rotation, and extension and some adduction

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9
Q

Subscapularis

A

O: Subscapular fossa
I: lesser tubercle
I: upper and lower subscapular nerve
F: prime mover medial rotation

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10
Q

Serratus anterior

A

O: lateral surface of upper 8-9 ribs
I: medial border of scap, most of them lower 1/3
I: long thoracic nerve
F: protraction and upward rotation, stabilizes scap by keeping scap attached to thoracic wall

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11
Q

Name of trunks and their roots

A

Upper trunk - C5 and C6
Middle Trunk - C7
Lower trunk - C8 and T1

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12
Q

Name the chords and their divisions

A

Lateral cord - anterior division from upper and middle trunk
Posterior - All 3 posterior divisions
Medial - anterior division from lower trunk

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13
Q

Location of trunk, division and cords

A

Trunk - posterior triangle
Divisions - behinds clavicle
Cords - within axial and relative to axillary artery (eg posterior cord in posterior to axillary artery)

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14
Q

Supraclavicular branches arise from ____ of brachial plexus and are positioned ____ relative to clavicle

A

Upper trunk or roots
Superior

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15
Q

Infraclavicular branches arise from ____ of brachial plexus and are positioned ____ relative to clavicle

A

Cords
Inferior

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16
Q

Supraclavicular branches

A

Dorsal scapular
Long thoracic
Nerve to subclavius
Suprascapular

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17
Q

Infraclavicular branches from lateral cord

A

Lateral pectoral N -
Musculocutaneus
Median N
Lateral root of median N

18
Q

Infraclavicular branches of medial cord

A

Medial pectoral
Medial cutaneous nerve of arm
Intercostobrachial
Medial cutaneous nerve of forearm
Ulnar N
Medial root of median nerve

19
Q

Posterior cord branches of Infraclavicular group

A

Upper subscapular
Thoracodorsal
Lower subscapular
Axillary
Radial

20
Q

Dorsal scapular

A

Supraclavicular
Root of C5
Pure motor
Levator scap, rhomboids

21
Q

Long thoracic N

A

Supraclavicular
C5-C7 roots
Pure motor to serratus anterior

22
Q

Upper Subscapular

A

C5, C6
Posterior cord
pure motor to upper half of subscapula

23
Q

Thoracodorsal

A

Segment C6-C8,
Posterior cord
pure motor to Lat

24
Q

Lower subscapular N

A

C5-C6
Posterior cord
motor to lower 1/2 subscap and teres major

25
Q

Axillary N

A

C5-C6
Posterior cord
mixed nerve with motor to deltoid, teres minor and upper lateral 2/3 of arm

26
Q

Radial N

A

C5-T1
Posterior cord
mixed nerve with motor to posterior arm and forearm with sensory to some of the arm, posterior forearm and lateral 2/3 dorsum of ha

27
Q

Nerve to subclavius

A

Supraclavicular Superior trunk
C5 and C6
pure motor from upper trunk of plexus to subclavius

28
Q

Suprascapular N

A

Supraclavicular superior trunk
C5-C6
pure motor from upper trunk to infra and supraspinatus

29
Q

Medial cutaneous nerve of arm

A

Infraclavicular branch medial cord pure T1
sensory to lower half medial arm

30
Q

Medial cutaneous nerve of forearm

A

Infraclavicular medial cord
C8-T1
pure sensory to forearm

31
Q

Ulnar N

A

Infraclavicular medial cord
C8-T1
mixed nerve supplying muscles of anterior forearm, most of the intrinsic hand muscle + skin on dorsal and medial 2/3 palmar aspect

32
Q

Medial Pectoral

A

Infraclavicular medial cord
C8-T1
Pure motor to pec minor and major

33
Q

Median N

A

Infraclavicular medial cord and lateral cord
C6-C8
Mixed with motor to anterior forearm and some hand + lateral 2/3 palmar skin

34
Q

Lateral pectoral

A

Infraclavicular lateral cord
C5-C7
pure motor to pec major and some pec minor

35
Q

Musculocutaneus

A

Infraclavicular lateral cord
C5-C6
mixed nerve supply ant compartment of arm and skin on lateral forearm (lateral cutaneous nerve of forearm)

36
Q

The 3 arteries form anastomosis in posterior scap

A

Transverse cervical
Suprascapular
circumflex scapular

37
Q

Superior thoracic A

A

Supplies anterior chest wall and breast

38
Q

Thoracoacromial A

A

Anterior chest and muscles attaching to acromion (trap and deltoid)
(2nd part of axillary artery)

39
Q

Lateral thoracic A

A

To serratus anterior from 2nd part

40
Q

Subscapular A

A

Divides into circumflex scapular(anastomosis)and thoracodorsal (lat)
From 3rd part

41
Q

Anterior and posterior circumflex humeral

A

Supply neck of humerus by making a circle of neck
- posterior is bigger
- from 3rd part

42
Q

Axillary A pathway

A

Turns from sublavian into axillary at lateral border 1st rib
1st part is over pec minor
2nd part is deep to pec minor
3rd part below pec minor
Turns into brachial below the inferior border of teres major

Anatomy 2nd Half (5 decks)

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