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PHY4004- Anatomy > UL- Shoulder > Flashcards

UL- Shoulder Flashcards

w/c 27th October 2023

1
Q

shoulder complex-
components, function

A
  • shoulder girdle (scapula, clavicle, prox. humerus)
  • GH joint (glenoid fossa, prox. humerus)

function:
- stability, mobility
- upper extremity positioning

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2
Q

joints of shoulder (4)

A

pectoral girdle region:
- Sternoclavicular (SC) joint
- Acromioclavicular (AC) joint
- Scapulothoracic joint

Humeral region:
- Glenohumeral joint (GH)

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3
Q

6 movements of shoulder girdle
(osteo-kinematics)

A
  • Elevation,
  • depression,
  • protraction
  • retraction,
  • upward/
  • downward rotation
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4
Q

muscles involved in ELEVATION in pectoral girdle (2)

A
  • trapezius (upper fibres)
  • levator scapula
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5
Q

trapezius info

A

Origin:
- spinous process of C7-T12

INSERTION:

Upper fibres
- posterior lateral 1/3 of clavicle

Middle fibres:
- medial border of acromion
- lateral aspect of scap. spine

Lower fibres:
- medial end of scapula spine (tubercle)

ACTIONS:
Upper- Elevation, Retraction & Upward rotation

Middle- Retraction & Elevation

Lower- Depression & Upward rotation

Nerves:
-Spinal accessory nerve (c3-4)

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6
Q

Levator scapula info

A

Origin:
- transverse processes of C1-C4

Insertion:
- medial border of scapula

Actions:
1. elevation
2. retraction
3. downward rotation of scapula

nerve:
- cervical nerves C3,4

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7
Q

muscles involved in DEPRESSION in pectoral girdle (2)

A
  • trapezius (lower fibres)
  • pectoralis minor
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8
Q

Pec. minor info

A

Origin:
- 3-5th rib
(outer surfaces)

Insertion:
- medial border of coracoid process
(upper surface)

Actions:
1. depression
2. protraction of pec girdle
3. anterior tilt of scapula

nerve:
- medial/lateral pec nerves
(c6-8)

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9
Q

muscles involved in PROTRACTION of pectoral girdle (2)

A
  • serratus anterior
  • pec. minor
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10
Q

Serratus anterior info

A

Origin:
- outer surfaces of upper 8 ribs

Insertion:
- medial border of scapula
(costal surfaces)

Actions:
1. Protraction
2. Upward rotation of scapula

nerve:
- long thoracic nerve
(c5-7)

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11
Q

muscles involved in RETRACTION of pec. girdle (4)

A
  • Rhomboid minor
  • rhomboid major
  • trapezius (middle fibres)
  • levator scapula
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12
Q

Rhomboid MINOR info

A

Origin:
- spinous processes of C7-T1

Insertion:
- base of spine of scapula

Actions:
1. retraction
2. downward rotation of scapula

nerve- dorsal scapula nerve (c4,5)

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13
Q

rhomboid MAJOR info

A

Origin:
- Spinous process of T2-T5

Insertion:
-Medial border of scapula

Other actions:
1. Retraction
2. Downward rotation of scapula

Nerve-Dorsal scapula nerve c4,5

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14
Q

muscles in UPWARD ROT. OF SCAPULA of pectoral girdle (2)

A
  • trapezius (upper, lower)
  • serratus anterior
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15
Q

muscles in DOWNWARD ROT. OF SCAPULA of pec girdle (4)

A
  • rhomboid major
  • rhomboid minor
  • pec minor
  • levator scapula
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16
Q

muscles in ELEVATION (through flexion) of GH joint (4)

A
  • pec major (clavicular fibres)
  • deltoid (anterior fibres)
  • biceps (brachii)
  • coracobrachialis

BCD P

17
Q

PECTORALIS MAJOR info

A

Origin:
- body of sternum
(anterior surface)

Insertion:
- lateral lip of bicipital groove

Actions:
1. GH Elevation
2. Shoulder depression
3. GH Medial rotation

Nerve: Med.& lat. pectoral nerve C5-T1

18
Q

Deltoid info

A

Origin:
- lat. margin of acromion process

Insertion:
- deltoid tuberosity (humerus)

Actions:
1. GH Elevation
2. GH Abduction
3. GH Extension (posterior fibres)
4. GH Med. rot. (anterior fibres)
5. GH Lat. rot. (posterior fibres)

Nerve: Axillary nerve C5,6

19
Q

Biceps Brachii info

A

Origin:
- SH: apex of coracoid process
- LH: supraglenoid tubercle

Insertion:
- radial tuberosity

Actions:
1. GH Elevation
2. Elbow flexion
3. Forearm supination

Nerve: musculocutaneous nerve C6,7

20
Q

muscles in EXTENSION of GH joint (5)

A
  • latissimus dorsi
  • teres major
  • pectoralis major (sternal fibres)
  • deltoid (posterior fibres)
  • triceps (LH)
21
Q

Latissimus dorsi info

A

Origin:
- thoracolumbar fascia
(posterior layer)

Insertion:
- floor of bicipital groove

Actions:
1. GH Extension
2. GH Adduction
3. GH Medial rotation

Nerve: thoracodorsal nerve C6-8

22
Q

Teres major info

A

Origin:
- inferior angle of scapula

Insertion:
- medial lip of bicipital groove

Actions:
1. GH Extension
2. GH Adduction
3. GH Medial rotation

Nerve: lower subscapular nerve C6,7

23
Q

Triceps info

A

Origin:
- LH: infraglenoid tubercle
- Lateral H: proximal 1/2 humerus(lateral surface)
- Medial H: medial to spinal groove

Insertion:
- olecranon
(posterior aspect)

Actions:
1. GH Extension
2. GH adduction
3. Elbow extension

Nerve: radial nerve

24
Q

muscles in ABDUCTION of GH joint (2)

A
  • supraspinatus
  • deltoid
25
Q

Supraspinatus info

A

Origin:
- supraspinous fossa
(medial 2/3rd)

Insertion:
- greater tubercle

Actions:
1. GH Abduction
2. involved in Lat. Rotation

Nerve: suprascapular nerve C5,6

26
Q

muscles in ADDUCTION of GH joint (6)

A
  • coracobrachialis
  • pectoralis major
  • latissimus dorsi
  • teres major
  • subscapularis
  • triceps brachii (LongH)
27
Q

Coracobrachialis info

A

Origin:
- coracoid process

Insertion:
- humeral shaft
(midway down medial aspect)

Actions:
1. GH ADDuction
2. GH flexion (very weak)

Nerve: musculocutaneous nerve C6,7

28
Q

muscles in MEDIAL ROT. of GH joint (5)

A

SUBSCAPULARIS
LATISSIMUS DORSI
TERES MAJOR
PECTORALIS MAJOR
DELTOID (ANTERIOR FIBRES)

29
Q

Subscapularis info

A

Origin:
- subscapular fossa
(Medial 2/3rd)

Insertion:
-Lesser tubercle of humerus

Actions:
1. GH Medial rotation
2. Adduction

Nerve: upper & lower subscapular nerves c5-7

30
Q

muscles in LAT. ROT. in GH joint (3)

A
  • teres MINOR
  • infraspinatus
  • deltoid (Post.Fibres)
31
Q

teres MINOR info

A

Origin:
-lateral border of scapula
(Upper 2/3rds)

Insertion:
- greater tubercle of humerus

Actions:
1. GH Lateral Rotation
2. GH Weak adduction

Nerve: Axillary nerve c5,6

32
Q

INFRAspinatus info

A

Origin:
- infraspinous fossa
(Medial 2/3rds)

Insertion:
- greater tubercle on humerus

Actions:
1. GH Lateral Rotation

Nerve: Suprascapular nerve c5,6

33
Q

rotator cuff- muscles involved, function

A

function: active stabilisers for humeral head in glenoid cavity

S.I.T.S
- supraspinatus
- infraspinatus
- teres MINOR
- subscapularis

PHY4004- Anatomy (11 decks)

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