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Anatomy > MSK - Upper Limb 1 > Flashcards

MSK - Upper Limb 1 Flashcards

1
Q

Mucles affected in Erb’s palsy

A
  • Biceps brachii
  • Brachialis
  • Deltoid
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2
Q

Segmental roots of the upper, middle and lower trunk of the brachial plexus

A
  • Upper = C5 + 6
  • Middle = C7
  • Lower = C8 + T1
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3
Q

What’s involved in Klumpke’s palsy

A

-Lower trunk

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4
Q

5 Major branches of the brachial plexus

A
  • Radial
  • Median
  • Ulnar
  • Axillary
  • Musculocutaneous
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5
Q

What makes up the lateral, medial and posterior cord

A
  • Lateral = C5 + 6
  • Medial = C8 + T1
  • Posterior = C6-C8
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6
Q

Nerve off the lateral, medial and posterior cord

A
  • Lateral = Musculocutaneous (lateral root of median n. alslo)
  • Medial = Unlnar (Medial root of median n. also)
  • Posterior = Radial + axillary
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7
Q

What type of joints are the AC and SC joints

A
  • AC = Synovial plane

- SC = Synovial saddle

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8
Q

What elevates and depresses the scapula

A

Elevates

  • Trapezius (upper fibres)
  • Rhomboid
  • Levator scapula

Depresses

  • Trpezius (lower fibres)
  • Pec minor, serratous ant.
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9
Q

what protracts and retracts the scapula

A

Retraction

  • Trapezius (middle fibres)
  • Rhomboids

Protraction
-Serratous ant.

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10
Q

Which bursa of the shoulder communicates witht the joint cavity

A

Subscapular bursa

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11
Q

Action of the ant, middle and posterior fibres of the deltoid on the shoulder joint

A
  • Ant. = Internal rotation + flexion
  • Middle = Abduction
  • Post. = Extension + external rotation
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12
Q

What nerve supplies the deltoid and how is it commonly damaged

A
  • Axillary (C5, 6)

- Fracture of the surgical neck of the humerus

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13
Q

Action of pec major on the shoulder joint

A
  • Internal rotation

- Adduction

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14
Q

What nerve supplies serratous ant. + sign of injury to this nerve + what procedure commonly injures it

A
  • Long thoracic nerve (C5-7)
  • Winged scapula
  • Radical mastectomy
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15
Q

Action of the sup. middle and inf. fibres of the trapezius on the scapula

A
  • Sup. = Elevation
  • Middle = Retraction
  • Inf. = Depression
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16
Q

Action of teres major and latissmuss dorsi on the shoulder joint

A
  • Teres major = Internal rotation + Adduction

- Latissmuss dorsi = Internal rotation + Adduction + Extension

17
Q

What muscles flex and extend the shoulder

A

Flexion

  • Ant. deltoid
  • Upper pec major

Extension

  • Post. deltoid
  • Latissimus dorsi
18
Q

What muscles adduct and abduct the shoulder

A

Adduct

  • Teres major
  • Latissimus dorsi

Abduct
-Middle deltoid

19
Q

What muscles internally and externally rotate the shoulder

A

Internally rotate

  • Pec and teres major
  • Lattisimus dorsi
  • Subscapularis

Externally rotate

  • Teres minor
  • Infraspinatous
20
Q

Most ant. muscle in arm

A

Biceps brachii

21
Q

Where do the long and short head of the bicep arise from

A
  • Long = Supraglenoid tubercle (runs in the bicipital groove of the humerus)
  • Short = Coracoid process (along with coracobrachialis)
22
Q

Where does the biceps tendon attactch distally

A

Radial tuberosity

23
Q

Action of biceps brachii on shoulder, elbow and sup. radio-ulnar joint

A
  • Shoulder + elbow = Flexion

- Radio-ulnar joint = Supination

24
Q

Innervation of biceps and what cord that nerve comes from

A
  • Musculocutaneous (C5-6)

- Lateral cord

25
Q

Action of coracobrachialis on shoulder and innervation of it

A
  • Flexion

- Musculocutaneous nerve (C5-7)

26
Q

Action and innervation of brachialis

A
  • Flexion of elbow joint

- Musculocutaneous nerve

27
Q

What does the musculocutaneous nerve innervate

A
  • Biceps brachii
  • Coracobrachialis
  • Brachialis
  • Skin of lateral forearm (AKA lateral cutaneous n.)
28
Q

Branches of brachial artery

A
  • Radial + ulnar (~at neck of radius)

- Profunda brachii

29
Q

What cord does the median nerve arise from

A

Lateral and medial

30
Q

What does the median nerve supply

A

All flexors in forearm (except carpi ulnaris)

Anatomy (7 decks)

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