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ANAT 392 - Meag > ARM + ELBOW > Flashcards

ARM + ELBOW Flashcards

1
Q

What is the course of the cephalic vein? and at what point does it drain into axillary vein

A

Lateral side of arm passes through deltopectoral groove where it drains into axillary

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2
Q

what is the course of the basilic vein? at what point does it drain into axillary vein

A

Comes from medial side of plecus, at mid point of arm it goes deep and joints to two brachial veins then joins to axillary vein

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3
Q

The ____ connects the two superficial veins of forearm

A

median cubital vein

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4
Q

What vein is used to do bloodwork

A

median cubital vein

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5
Q

What is the network of veins on the back of the hand called

A

Dorsal Venus plexus

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6
Q

Muscles of the anterior compartment of arm are supplied by…

A

Musculocutaneous nerve

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7
Q

Muscles of posterior compartment of arm are supplied by…

A

radial nerve

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8
Q

What creates the division between the anterior and posterior compartments of the arm

A

extensions of deep fascia and join to humerus

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9
Q

Biceps Brachii

A 
O - LH: Supraglenoid tubercle 
SH: Coracoid process 
I - Radial tuberosity 
A - Shoulder and elbow flexion, supination, abduction of GH 
NS - Musculocutaneous
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10
Q

Coracobrachialis

A

O - Coracoid process
I - midpoint of humeral shaft
A - GH flexion
NS - Musculocutaneous

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11
Q

Brachialis

A

O - Anterior shaft of humerus
I - Ulnar tuberosity
A - Elbow flexion
NS - Musculocutaneous

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12
Q

Triceps Brachii

A 
O - Long: Infraglenoid tubercle 
Lat: lateral posterior shaft of humerus 
Med: Medial posterior shaft of humerus 
I - Olecranon process 
A - All: Elbow extension 
L: GH extension 
NS: All: Radial nerve when its in radial groove. Long head also receives extra from axillary
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13
Q

What makes the long head of triceps more important than the other

A

The lat has the strength to dislocate the humerus, Long H resists this

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14
Q

Would a fractured shaft of humerus effect the radial nerves ability to innervate triceps

A

No, because nerve is supplying it higher up

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15
Q

Radial nerve travels in ____

A

spiral groove

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16
Q

The deep brachial artery travels with which nerve

A

Radial nerve in through triangular space and into spiral groove

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17
Q

When does the brachial artery branch into the radial and ulnar nerves

A

after cubital fossa

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18
Q

The musculocutaneous nerve is sandwiched between….

A

biceps and brachialis

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19
Q

The musculocutaneous branches into the …

A

Lateral cutaneous nerve at lateral epicondyle

20
Q

The median and ulnar nerves run in which groove

A

The medial bicipital groove

21
Q

The median nerve carries some sympathetic fibres which target…

A

the brachial artery

22
Q

What is the sympathetic branch of the median nerve called

A

brachial branch

23
Q

What does the brachial branch of the median nerve do

A

causes vasoconstriction of the brachial artery

24
Q

What pathology does the brachial branch of the median nerve contribute to

A

Reynaud’s - lack of blood in fingers

25
Q

The ulnar nerve passes behind the medial epicondyle of humerus in what groove

A

The ulnar groove or cubital tunnel

26
Q

The radial nerve is covered by… in the upper arm

A

Lateral head of triceps

27
Q

What is the most superficial nerve in the axillary

A

radial nerve

28
Q

What are the 3 joints of the elbow

A

Humeroradial
Humeroulnar
Proximal radioulnar

29
Q

What forms the humeroradial joint? what type of joint is it?

A
  • Capitulum and fovea capitis of superior surface of head of radius
  • Synovial condylar joint
30
Q

What forms the humeroulnar joint? what type of joint is it?

A
  • trochlea of humerus and trochlear notch of ulna

- Synovial hinge joint

31
Q

What forms the proximal radioulnar joint? what type of joint is it?

A
  • radial notch of ulna and head of radius

- Synovial pivot joint

32
Q

What are the 6 main ligaments of the elbow

A
  • Anterior oblique ligament
  • Lateral collateral ligament
  • Medial collateral ligament
  • Annular ligament
  • Oblique cord
  • Quadrate ligament
33
Q

What is the annular ligament

A

round ligament encircling around head of radius and holding it to the radial notch of ulna

34
Q

When does the annular ligament develop? what does this result in?

A

Until age 10 making the radius unstable and prone to dislocation up until that point

35
Q

Which of the 5 main ligaments of the elbow is extrinsic?

A

oblique cord

36
Q

Where is the quadrate ligament? what is it’s role

A

Running between neck of radius and proximal ulnar joint

- Adds stability to the proximal radio-ulnar joint

37
Q

In extension, what occurs to medial epicondyle, lateral epicondyle and olecranon (position). in flexion? What disrupts this relationship?

A

they made a horizontal line

They make an equilateral triangle lying in the coronal plane

Dislocation

38
Q

The distal end of a humerus bulges anteriorly at an angle of…

A

45 degrees to the shaft

39
Q

Due to the 45 degree angle of the distal end of the humerus, the trochlean lies…

A

in front of the axis

40
Q

The trochlear notch of the ulna projects…

A

anteriorly and superiorly at an angle of 45 degrees to the ulnar shaft

41
Q

Why are the angles of the trochlea and trochlear notch important

A

they allow for full range of flexion by having bony contact of the coronoid process with the humerus only when the two bones are parallel and by keeping a space between the two bones even in full flexion for muscles

42
Q

which muscle group of the forearm is more powerful

A

the flexors

43
Q

When are flexors maximally efficient

A

with arms above head

44
Q

when are extensors maximally efficient

A

with arms beside trunk

45
Q

What 3 branches arise from radial nerve while it is in radial groove

A

Posterior cutaneous nerve of arm
Lower lateral cutaneous nerve of arm
Posterior cutaneous nerve of forearm

ANAT 392 - Meag (18 decks)

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