Living Anatomy Muscles of the Arm
Where are the Cephalic and Basilic Vein located?
Cephalic: anterolateral surface of arm Basilic: anteromedial surface of arm
What 3 muscles make up the pyramidal wall of the Axilla? (Anterior, Posterior and Medial) What bone makes the lateral wall?
Anterior Wall: pectoralis major Posterior Wall: latissimus dorsi and teres major Medial Wall: serratus anterior and ribs 2-6 Lateral Wall: humerus
The Brachial Plexus surrounds which artery? Which 3 cords make it up?
Axillary Posterior, Lateral, Medial palpate cords in axilla (possibly)
What is the major artery that supplies blood to the upper extremity? and how do you palpate it? It's a continuation of what artery?
Axillary artery palpate deep in the axilla toward the humerus subclavian (changes to axillary artery at lateral border of 1st rib)
What is the major nerve supply to the upper extremity?
Brachial Plexus
Biceps Brachii Action
Flexion and Supination of forearm Flexion of arm Short head: also adducts
Biceps Brachii Innvervation
Musculocutaneous nerve
Upper Trapezius Origin and insertion
O: EOP, Superior Nuchal Line, Spinous process of C1-7 I: Lateral 1/3 of clavicle and acromion process
Biceps Brachii Short Head Origin and Insertion
O: coracoid process of scapula I: radial tuberosity and aponeurosis of bicipital brachii
Biceps Brachii Long Head Origin and Insertion
O: supraglenoid tubercle of scapula I: radial tuberosity and aponeurosis of bicipital brachii
Upper Trapezius Action
Scapular elevation and upward rotation Extends Head and Neck Lateral Flexion of Head and Neck to Side of contraction Rotates head and neck away from side of contraction (contralateral rotation)
Where is the subacromial bursa located and what's it's function? (non-palpable)
between the acromion and rotator cuff relieves pressure in that area
Coracobrachialis origin
coracoid process of scapula
Brachialis Origin
distal 1/2 of anterior humerus .
Triceps Brachii Action
extension of forearm long head extends and adducts arm
Corcobrachialis actions
flexion and adduction of arm
Brachialis Action
flexion of the forearm
Triceps Brachii Medial Head
inferior 2/3 of posterior humerus
Triceps Brachii Long Head Origin
infraglenoid tubercle of scapula
Brachial Artery starts where? Where do you palpate it?
lower border of teres major press on the medial border of the biceps brachii to the humerus to palpate
Coracobrachialis insertion
middle of medial shaft of humerus
Brachialis Innervation
musculocutaneous and radial nerves
Coracobrachialis Innervation
musculocutaneous nerve
Triceps Brachii Insertion
olecranon process of ulna
Triceps Brachii Innervation
radial nerve
Trapezius Innervation
spinal accessory nerve
Triceps Brachii Lateral Head
superior 1/2 of posterior lateral humerus
Axillary Lymph nodes may be palpated in what portion of the axilla? (not always palpable)
superior portion palpate towards chest wall
Brachialis Insertion
ulnar coronoid process and tuberosity
