Upper Extremity Flashcards
Superficial veins of the upper arm
cephalic vein - lateral
basilic vein - medial
median cubital -cubital fossa
joints of the shoulder
sternoclavicular
acromioclavicular
glenohumeral
anterior muscles of the shoulder and arm
Pectoralis major
Pectoralis minor
Serratus anterior
function of pectoralis major
adducts and medially rotates the shoulder
flexes the shoulder
innervation of the pectoralis major
lateral and medial pectoral nn.
function of the pectoralis minotr
stabilizes scapula
innervation of the pectoralis minor
medial pectoral n.
function of the serratus anterior
protracts scapula
innervation of the serratus anterior
long thoracic nerve
posterior muscles of the shoulder and arm
trapezius
latissimus dorsi
function of the trapezius
superior -elevates scapula
middle - retracts scapula
inferior - depresses scapula and glenoid rotation
innervation of the trapezius
CN XI spinal accessory nerve
function of the latissimus dorrsi
extends, adducts, and medially rotates shoulder
innervation of the latissimus dorsi
thoracodorsal n.
what muscles are deep to the trapezius? what is their innervation?
levator scapulae
rhomboids
dorsal scapular n.
function of the levator scapulae
elevates scapula
function of the rhomboids
retracts scapula
how many muscles are part of scapulohumeral?
6 muscles; 4 of which are rotator cuff
function of the deltoid muscle
Anterior - flexes
Middle - abducts shoulder
Posterior - laterally rotates shoulder
innervation of the deltoid
axillary nerve (C5-C6)
function of the teres major
adducts and medially rotates shoulder
innervation of teres major
lower subscapular nerve (C6-C7)
name the four rotator cuff muscles
supraspinatus
infraspinatus
teres minor
infraspinatus
function of the rotator cuff muscles
form a musculotendinous cuff around the glenohumeral joint
they are all rotators except the supraspinatus
function of the supraspinatus
adducts the humerus
what do the SITS tendons blend with?
joint capsule
innervation of the sits muscles?
subscapular nerve (C6-c7)
explain a rotator cuff injury
tear of supraspinatus tendon or degenerative tendinitis
what is the axilla?
pyramidal space at junction of arm and thorax
passageway for vessels and nerves
What are the three parts of the axillary artery?
- superior thoracic artery
- lateral thoracic artery
Thoracoacromial artery - anterior/poster circumflex humeral artery
subscapular artery
Brachial plexus nerve root
ventral rami C5-T1
Anterior muscles of the arm and innervation
biceps brachii
brachialis
coracobrachialis
musculocutaneous nerve
function of the biceps brachii
flexes shoulder and elbow
function of brachialis
flexes elbow
coracobrachialis
flexes shoulder
name the extensors of the elbow
triceps trachii - long, short, lateral head
aconeous
innervation of the extensors of the elbow
radial nerve
blood supply to the arm
brachial artery
deep brachial artery
axillary artery
cubital fossa
median cubital vein is here
joints of the elbow
humeroulnar
humeroradial
proximo radioulnar
muscles of the forearm: superficial layer: flexors
pronator teres, flexor carpi radialis, palmaris longus, flexor carpi ulnaris
innervation of the superficial layer of the forearm and exception (flexors)
median nerve
EXCEPT medial part of flexor digitorum profundus which is ulnar nerve
Extensors of the forearm: superficial
Brachioradialis Extensor carpi radialis longus Extensor carpi radialis brevis Extensor digitorum Extensor digiti minimi Extensor carpi ulnaris
Extensors of the forearm: deep layer and innervation
Supinator Abductor pollicis longus Extensor pollicis brevis Extensor pollicis longus Extensor indicis
radial nerve
carpal tunnel
passageway deep to flexor retinaculum
carpal tunnel design
roof = flexor retinaculum floor/walls = carpal bones
what are the contents of the flexor retinaculum?
median nerve
FDS
FDP
FPL tendon
importance of carpal tunnel
swelling of contents of carpal tunnel can result in compression of median nerve = tingling and pain in the hand
carpal tunnel causes tingling and pain in which digits
1-3 and part of 4
arterial supply to the hand
radial nerve and ulnar nerve
anatomical snuff box
Where radial a. passes between extensor pollicis longus and brevis tendons