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PT602 > The Brachium > Flashcards

The Brachium Flashcards

1
Q

Anterior arm musculature

A

Coracobrachialis
biceps brachii (long and short head)
brachialis

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2
Q

Anterior arm muscles are innervated by

and the lateral surface of the skin of the forearm:

A

the musculocutaneous nerve

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3
Q

Coracobrachialis

origin

A

apex of the coracoid process of the scapula

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4
Q

Coracobrachialis

insertion

A

humerus

in line with crest of lesser tuberocity; linear roughening on midshaft of humerus on medial side

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5
Q

Coracobrachialis

innervation

A

musculocutaneous

C5 C6 C7

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6
Q

Coracobrachialis

action

A

flexion at GH joint
aDduction
internal rotation

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7
Q

Biceps Brachii

origin

A

long head- supraglenoid tubercle of scapula

short head- coracoid process of scapula

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8
Q

Biceps Brachii

insertion

A

radial tuberocity

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9
Q

Biceps Brachii

innervation

A

musculocutaneous nerve

C5 C6 C7

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10
Q

Biceps Brachii

action

A

elbow joint- flexion of forearm
supination (when elbow is flexed, biceps is a powerful supinator)

shoulder joint- flexion
stabilization of humeral head during deltoid contraction
aBduction and internal rotation of humerus

accessory flexor of the arm at the GH joint

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11
Q

Brachialis

origin

A

distal half of anterior surface of humerus

anterior aspec of humerus-medial and lateral surfaces- and adjacent internmuscular septa

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12
Q

Brachialis

insertion

A

ulnar tuberosity

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13
Q

Brachialis

innervation

A

musculocutaneous nerve
C5 C6 C7
small contribution by the radial nerve C7 to lateral part of the muscle

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14
Q

Brachialis

action

A

flexion at the elbow joint

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15
Q

Posterior Arm Musculature

A

Triceps (long, medial, lateral heads)

Anconeus

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16
Q

All posterior muscles are innervated by:

A

the radial nerve

C5-T1

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17
Q

Tricpes

origin

A
  1. Long head- infraglenoid tubercle of scapula
  2. Medial head- posterior humerus inferior to radial groove & medial intermuscular septum
  3. Lateral head- posterior humerus proximal to radial groove & lateral intermuscular septum
18
Q

Triceps

insertion

A

olecranon of ulna

19
Q

Triceps

innervation

A

radial nerve

C5-T1

20
Q

Triceps

action

A

elbow joint- extension

shoulder joint- long head extension and ADduction

21
Q

Ancneous

origin

A

lateral epicondyle of humerus

variance: posterior joint capsule

22
Q

Ancneous

insertion

A

olecranon of ulna (radial surface)

proximal surface of ulna

23
Q

Ancneous

innervation

A

radial nerve
C6 C7 C8
via branch to medial head of triceps brachii

24
Q

Ancneous

action

A

extends the elbow and tightens the joint
ADduction of the ulna in pronation
accessory extensor of the elbow joint

25
Q

The path of the musculocutaenous nerve

A

leaves the axilla
enters the arm through the coracobrachialis
diagonally down the arm
deep to biceps, superficially to the brachial is
gives rise to motor branches
emerges laterally to the tendon of the biceps at the elbow
continues at the lateral cutaneous nerve of the forearm

26
Q

Brachial artery

A

become the brachial artery after the axillary artery crosses the lower border of the teres MAJOR muscle
terminates just distal to the elbow joint where it divides into the radial and ulnar arteries

proximally it lies medial side
distal: it moves laterally to lie in the middle of the medial and lateral epicondyle of the humerus
medial to the tendon of the biceps

27
Q

largest branch of the brachial artery:

A

profunda brachii artery

28
Q

profunda brachii artey

A

supplies the posterior compartment of the arm

it runs with the radial nerve

29
Q

Veins in the arm

A

paired brachial veins
cephalic vein
basilic vein

30
Q

Paired brachial vein

A

passes along the medial and lateral sides of the branches of the brachial artery

31
Q

cephalic vein

A

lateral side of arm

32
Q

basilic vein

A

medial side of arm

33
Q

All posterior muscles are innervated by:

A

Radial nerve

C5-T1

34
Q

profunda brachia artery

35
Q

superior throacic artery

36
Q

thoracoacromial artery

37
Q

lateral thoracoacromial artery

38
Q

subscapular artery

39
Q

anterior humeral circumflex artery

40
Q

posterior humeral circumflex artery

PT602 (15 decks)

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