Arm and Anterior Forearm Flashcards Preview

Anatomy and Radiology - Test 1 > Arm and Anterior Forearm > Flashcards

Flashcards in Arm and Anterior Forearm Deck (51):
1

Compartments of he arm

Posterior and anterior

2

Brachial fascia

Deep fascia of the arm

3

Intermuscular septa

Extensions of the deep fascia that attach to the bone

4

How are compartments formed

By extensions of deep fascia attaching to bones

5

Anterior compartment arm muscles

Biceps brachii (long head and short head)
Coracobrachialis
Brachialis

6

Major action of muscles of anterior compartment of arm

Flexion of forearm and some at glenohumeral joint

7

All muscles of anterior compartment innervated by

musculocutaneous nerve

8

Biceps brachii function and innervation

Flexor of shoulder and elbow, supinator of forearm
Musculocutaneous nerve

9

What happens as biceps tendon crosses elbow joint

Bicipital aponeurosis is given off and passes medially and superficial to brachial artery and median nerve to fuse with deep fascia of the forearm

10

bicipital aponeurosis

Aponeurotic sheet that passes laterally and medially to the brachial artery and median nerve to fuse with deep fascia of the forearm

11

Bicipital aponeurosis provides a ____

secondary attachment

12

Coracobrachialis function and innervation

Flexes arm
Musculocutaneous

13

Brachials function and innervation

Flexes forearm
Musculocutaneous

14

Posterior compartment muscles

Triceps brachii (long, lateral, medial heads)

15

Major action of posterior compartment

Extension at the elbow and some at glenohumeral

16

All muscles of posterior compartment innervated by the

Radial nerve

17

Anconeus

also helps to extend elbow
Radial

18

Anterior compartment arteries

Brachial

19

Posterior compartment arteries

Deep brachial (profunda brachii)
posterior humeral circumflex

20

Median nerve innervations in arm

None

21

Musculocutaneous nerve innervations of arm

Anterior flexor muscles in arm
Becomes cutaneous in forearm

22

Ulnar nerve

Medial side of brachial artery...goes behind medial epicondyle...funny bone feeeling
No branches in the arm

23

Radial nerve in arm

Extensor compartment of arm
All extensors of forearm as well

24

What is radial nerve accompanied by?

Deep brachial artery

25

Fracture in surgical neck of humerous leaves what vulnerable and why?

Axillary nerve and posterior humeral circumflex artery
Axillary nerve wraps around surgical neck of humerus

26

Mid-shaft fracture leaves what vulnerable and why?

Radial and deep brachial because wrap around humerus in groove for radial nerve

27

Fracture of medial epicondyle leaves what vulnerable and why?

Ulnar nerve because it lies posterior to the median epicondyle

28

Fracture of distal end of humerus leaves what vulnerable and why?

Median nerve because it lies anterior to distal end of humerus

29

Cubital fossa bound by

Epicondyles
Pronator teres
Brachioradialis

30

Bicipital aponeurosis

Extension of biceps tendon...roof of cubital fossa

31

What is found in cubital fossa and where relative to bicipital aponeurosis

Tendon of biceps
Brachial artery
Median nerve

32

Which vein does bicipital aponeurosis protect?

Median cubital vein

33

Components of forearm

Posterior and anterior

34

Antebrachial fascia

Deep fascia that encloses both compartment muscles

35

What is proximally attached to antebrachial fascia?

Forearm muscles

36

What separates forearm posterior and anterior

Interosseus membrane holding together radius and ulna

37

Which forearm bone has intermuscular septa and which doesn't

Radius
Ulna is subcutaneous the entire way down

38

Layers of anterior compartment of forearm and how separated?

Deep and superficial
Fascial cleft

39

Majority of anterior forearm muscles arise from

Medial epicondyle

40

Major action of anterior forearm

At writse...some flexing of forearm

41

Muscles of superficial layer of anterior forearm

Pronator teres
Flexor carpi radialis
Palmaris Longus
Flexor carpi Ulnaris
Flexor digitorum superficialis

42

Muscles of deep layer of anterior forearm

Flexor digitorum profundus
Flexor pollicis longus
Pronator quadratus

43

Innervation of anterior compartment of forearm

All innervated by median nerve except for flexor carpi ulnaris and the medial half of flexor carpi digitorum profundus

44

Pronator teres function and innervation

Pronates and flexes the forearm
Median nerve

45

Flexor carpi radialis function and innervation

Flexes and abducts the hand
Median nerve

46

Palmaris longus function and innervation

85% of people
Flexes hand
Median nerve

47

Flexor carpi ulnaris function and innervation

Flexes and adducts hand
Ulnar nerve

48

Flexor digitorum superficiales function and innervation

Flexes IP joint (and MCP joint and wrist)
Median nerve

49

Flexor digitorum profundus function and innervation

Flexes distal IP joint (and proximial IP and MCP and wrist)
Median nerve for digits 2 and 3, ulnar nerve for digits 4 and 5

50

Flexor pollicis longus function and innervation

Flexes IP joint (and MCP and wrist)
Median nerve

51

Pronator quadratus function and innervation

Pronates forearm
Median nerve