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Limbs Anatomy (own flashcards) > Shoulder and arm > Flashcards

Shoulder and arm Flashcards

1
Q

Trapezius - attachments

A

Proximal: external occipital protuberance, occipital bone, ligamentum nuchae, spinous processes of cervical and thoracic vertebrae

Distal: Posterior border of lateral third of clavicle, medial margin of acromion, posterior border of scapular spine

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2
Q

Trapezius - innervation

A

Motor supply - accessory nerve (CNXI)

Proprioceptive fibres - C3, C4

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3
Q

Trapezius - action

A

Elevation, depression and retraction of scapula

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4
Q

Latissimus dorsi - attachments

A

Proximal: Aponeurosis of posterior layer of thoracocolumnar fascia, spinous processes of lower 6 thoracic vertebrae, most inferior 3/4 ribs (may also attach to iliac crest)

Distal: intertubercular groove of humerus in between insertion points of pec major and teres major.

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5
Q

Latissimus dorsi - innervation

A

Thoracodorsal nerve (C6-C8)

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6
Q

Latissimus dorsi - action

A

Extends, adducts and medially rotates the humerus

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7
Q

Levator scapulae - attachments

A

Proximal: Transverse processes of C1-C4

Distal: Superior portion of medial border of scapula

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8
Q

Levator scapulae - innervation

A

C3 and C4 - cervical plexus

Branch of dorsal scapular nerve (C5) (lower fibres)

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9
Q

Levator scapulae - action

A

Elevates the scapula

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10
Q

Deltoid - attachments

A

Proximal: Lateral third of clavicle, superior surface of acromion, spine of scapula

Distal: Fibres converge into tendon which is attached to deltoid tuberosity (lateral aspect of shaft of humerus)

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11
Q

Deltoid - innervation

A

Axillary nerve (C5, C6)

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12
Q

Deltoid - action

A

Abduction, flexion and extension of the humerus

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13
Q

Supraspinatus - attachments

A

Proximal: Medial 2/3 of supraspinatus fossa from supraspinatus fascia

Distal: Fibres converge to form tendon which inserts into greater tubercle of humerus

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14
Q

Supraspinatus - innervation

A

Suprascapular nerve (C5, C6)

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15
Q

Supraspinatus - action

A

Abduction of arm and stabilises humerus (works with deltoid)

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16
Q

Infraspinatus - innervation

A

Suprascapular nerve (C5, C6)

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17
Q

Infraspinatus - action and attachments

A

Lateral rotation of humerus and braces head of humerus in glenoid fossa

Proximal: Medial 2/3 of infraspinatus fossa from infraspinatus fascia

Distal: Fibres converge to form tendon which inserts into greater tubercle of humerus

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18
Q

Teres minor - attachments

A

Proximal: Lateral border of scapula

Distal: Greater tubercle of humerus

19
Q

Teres minor - innervation

A

Axillary nerve (C5, C6)

20
Q

Teres minor - action

A

One of four rotator cuff muscles

Stabilises shoulder joint

21
Q

Teres minor - action

A

One of four rotator cuff muscles - Stabilises shoulder joint
Lateral rotation and weak adduction of arm

22
Q

Teres major - innervation

A

Lower subscapular nerve (C6, C7)

23
Q

Teres major - action

A

Extension of arm from flexed position

Adduction and medial rotation of arm

24
Q

Subscapularis - attachments

A

Proximal: Medial 2/3 of subscapular fossa + lower 2/3 of lateral border of scapula

Distal: Fibres converge into tendon which inserts into lesser tubercle of humerus and anterior portion of shoulder joint capsule

25
Q

Subscapularis - innervation

A

Upper and lower subscapular nerves (C5, C6)

26
Q

Subscapularis - action

A

One of four rotator cuff muscles
Stabilises shoulder joint, preventing anterior displacement of humerus
Medial rotation and adduction of humerus at shoulder

27
Q

Pectoralis major - attachments

A

Proximal: Sternal half of clavicle, upper half of sternum, aponeurosis of external oblique muscle

Distal: All 3 parts of muscle end as a flat tendon inserted into the inter tubercular groove of the humerus

28
Q

Pectorals major - innervation

A

Medial and lateral pectoral nerves (C5-C8)

29
Q

Pectoralis major - action

A

Adduction, medial rotation, flexion of humerus

30
Q

Biceps brachii - attachments

A

Proximal: Short head - apex of coracoid process
Long head - supraglenoid tubercle of scapula

Distal: Both muscle allies join to form a flattened tendon that is inserted into the radial tuberosity

31
Q

Biceps brachii - innervation

A

Musculocutaenous nerve (C5, C6)

32
Q

Biceps brachii - action

A

Supinator of forearm (with forearm partially flexed)

Flexor of supinated forearm

33
Q

Coracobrachialis - attachments

A

Proximal: Apex of coracoid process of scapula

Distal: Middle of medial surface and border of humerus

34
Q

Coracobrachialis - innervation

A

Musculocutaneous nerve (C6, C7)

35
Q

Coracobrachialis - action

A

Flexes and adducts the arm at the shoulder

36
Q

Brachialis - attachments

A

Proximal: Arises from distal half of the anterior humerus

Distal: Inserts into the tuberosity and anterior surface of the coranoid process of ulna

37
Q

Brachialis - innervation

A

Musculocutaneous nerve (C5, C6)

38
Q

Brachialis - action

A

Flexor of forearm at elbow

39
Q

Triceps brachii - attachments

A

Proximal: Long head - infraglenoid tubercle of scapula
Lateral head/Medial head - posterior surface of humerus

Distal: All head insert by common tendon into posterior portion of proximal olecranon of ulna

40
Q

Triceps brachii - innervation

A

Radial nerve (C7, C8)

41
Q

Triceps brachii - action

A

Extension of forearm at elbow

Long head - extension of humerus

42
Q

Anconeous - attachments

A

Proximal: Lateral epicondyle of the humerus

Distal: Lateral aspect of olecranon and upper dorsal surface of body of ulna

43
Q

Anconeus - innervation

A

Radial nerve (C7, C8)

44
Q

Anconeus - action

A

Extension of forearm at elbow

Limbs Anatomy (own flashcards) (3 decks)

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