Pectoral Girdle and upper limbs Flashcards Preview

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Flashcards in Pectoral Girdle and upper limbs Deck (38)
1

Pectoral girdle

formed by clavicle and scapula

2

Shoulder

pectoral girdle, proximal portion of humerus

3

Acromioclavicular joint - 1 of 2 shoulder joints

Scapula to clavicle

4

Glenohumeral joint - 1 of 2 shoulder joints

Connects upper limb to pectoral girdle.

5

Greater and lesser tubercle

Lateral and anterior respectively. rotator cuff muscle attachment sites

6

Intertubercular Sulcus

Bicipital groove named for muscleR tendon that runs through here.

7

Radial groove of humerus

Radial nerve and profunda brachii artery lie in this groove.

8

Lateral epicondyle

Attachment for posterior forearm compartment muscles.

9

Medial epicondyle

Large protuberence for attachment of anterior forearm compartment muscles. Ulnar nerve passes posteriorly to this.

10

Capitulum

Articulates w/radius - radial fossa

11

Trochlea

Articulates with ulna - coronoid fossa

12

Olecranon fossa

Posterior surface. Olecranon of ulna during extension.

13

Radial tuberosity

Attachment of biceps brachii tendon

14

Oblique line

Important for muscle attachments

15

Ulna tuberosity

Important for brachiallis attachment.

16

Supinator crest

Important for attachment of deep/ulnar head of supinator muscle.

17

Dorsal tubercle

Thumb extensor muscle "pulley".

18

Wrist

8 carpel bones in rows of 4 bones each.

19

Cutaneous nerves

located in superficial fascia. Not visible through skin. Branches of brachial plexus deep to deep fascia.
Superficial veins - in superficial fascia - visible through skin, tributaries to deep veins beneath deep fascia.

20

Look at nerve locations for cutaneous nerves - slides

x

21

Superficial veins

Cephlic v, basilic v, median cubital v, dorsal venous arch.

22

Basilic vein

Drains anterior/medial aspect of UL, pierces deep fascia of arm, tributary to axillary v.

23

Median cubital vein

Connects cephalic and basilic v. Located in cubital fossa. IV vein for venipuncture.

24

Dorsal venous arch of the hand

Drains superficial dorsal vv. of hand. Arches across dorsal surface of hand, trubutary to both cephalic and basilic v.

25

Deep fascia of arm

Deep fascia of arm - brachial fossa. Will compartmentalize areas of arm. Connected to humerus by 2 fascial septa. Divides arm into anterior and posterior compartments. As a result, this will compartmentalize neurovasculature and muscles. Clinically relevnat to compartmental syndromes (swelling in one specific compartment, etc.).

26

Anterior compartment of arm

Contains biceps brachii, coracobrachialis and brachialis muscle. Contains brachail vessels and 5 brachial plexus nerves - 3 motor nerves, musculocutaneous, median and ulnar nn.-supply skin of medial arm & forearm

27

biceps brachii

Long head = long tendon (you can't see full extent of it). Short head will look like it is the longer muscle.

A: flexes & supinates forearm (slight arm flexion)
N: musculocutaneous n. & brachial vessels

28

Brachialis

Deep muscle of the bulk of the arm. Musculocutaneous nerve pierces the muscle. Flexes the forearm (insertion is on one of the bones of the forearm.

A: flexes forearm
N: radial & musculocutaneous nn. & brachial vessels

29

Coracobrachialis muscle

A: flexes arm
N: musculocutaneous n. & brachial vessels

30

Posterior Compartment of Arm

Contains triceps brachii m.
extensors of elbow/forearm
‘3 head’
long, lateral, & medial
Contains radial n. & deep brachial a.
initially located within triangular interval

31

Profunda/profundus

Refers to deep.

32

Anterior Compartment of Forearm

3 Layers:
superficial (4)
intermediate (1)
deep (3)

Associated functions: wrist movements, flexion of digits & thumb, and pronation

Median & Ulnar nn.
(C6, C7, C8, T1)

33

Posterior compartment of forearm

2 layers - superficial (7), deep (5).

Associated with: movement of wrist, extension of fingers and thumb, supination, innervated by radial n - C5, 6, 7, 8.

34

Musculocutaneous nerve

Pierces coracobrachialis muscle to supply it. Continues into biceps and brachialis. Supplies all of brachii and medial part of brachiallis. Emerges between these mm as lateral antebrachial cutaneous.

35

Median N.

Runs down medial aspect of arm lateral to brachial artery. Crosses over to medial side of it and enters cubital fossa. Runs between superficial and deep anterior forearm muscle.

36

Ulnar nerve

Travels posteriorly down medial aspect of arm. Runs in cubital tunnel between medial epicondyle and lecranon. "Funnybone" is direct compression of ulnar nerve. Very superficial, but dives deep into medial forearm with ulnar artery to supply it. Continues over carpal tunnel to supply medial hand and deepest muscles of hand.

37

Radial nerve

Runs with deep brachial - profunda brachial - artery in radial groove of humerus. Located between lateral and medial heads of triceps. Continues between brachialis and brachiradials mm. Supplies all of triceps brachii and lateral part of brachialis muscle.

38

Brachial artery

Direct continuation of axillary artery. Runs from inferior border of teres major m to its bifurcation. Once this passes, it splits to radial and ulnar arteries in cubital fossa. Sends off deep brachial a and several msucular branches. Sends off superior an dinferior ulnar collateral.