C. Riedinger - An easy way to learn muscles C. Riedinger - An easy way to learn muscles Muscles of the shoulder biceps brachii serratus anterior pectoralis major short head long head coraco- brachialis pectoralis minor name meaning body part location / layer origin insertion nerve supply blood supply function pectoralis major major chest muscle shoulder supericial clavicular head: anterior surface of medial half of clavicle, sternocostal head: anterior surface of sternum, superior six costal cartilages, aponeurosis of the external obliqe muscle lateral lip of intertubercular groove of humerus (long insertion) lateral pectoral nerve (lat. cord) pectoral branch of thoracoacromial trunk adducts and medially rotates the humerus pectoralis minor minor chest muscle shoulder deep to pectoralis major 3rd to 5th ribs near their costal cartilages medial border and superior surface of coracoid process of scapula medial pectoral nerve (post. cord) pectoral branch of thoracoacromial trunk stabilises scapula by drawing it against the thoracic wall, horizontal adduction of shoulder serratus anterior muscle that's notched like the edge of a saw shoulder outer surface of upper 8 or 9 ribs (or more) costal aspect of medial margin of scapula long thoracic nerve lateral thoracic artery, thoracodorsal artery protracts (=anterior movement of arms at shoulder) and stabilises scapula biceps brachii biceps of the arm arm anterior, superficial long head: supraglenoid tubercle of scapula (through sleeve of synovial tissue in intertubercular /bicipital groove of humerus, short head: coracoid process, joins long head midway down arm via common tendon into the bicipical tuberosity of radius. Medial side: via bicipital aponeurosis into deep fascia of medial forearm and subcutaneous border of ulna musculocutaneous brachial artery supinator of forearm when elbow is flexed, flexes elbow in fully supinated position. Shoulder: stabilises and minor flexion coracobrachialis muscle of the arm and coracoid process arm anterior, deep tip of coracoid process of scapula (with short head of biceps) medial aspect mid-shaft of humerus musculocutaneous brachial artery adducts shoulder (to hold things under arm), weak flexor of shoulder joint
A summary for learning the muscles of the shoulder including their attachments, innervation, etc., without having to have too many books open. Resources: "Grey’s anatomy", "Taschenatlas Anatomie", "McMinn’s Clinical Atlas of Human Anatomy" and Wikipedia. Awaiting further proof-reading!
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C. Riedinger An easy way to learn musclesC. Riedinger An easy way to learn muscles
Muscles of the shoulder
bicepsbrachii
serratus anterior
pectoralis major
short head
long head
coracobrachialis
pectoralisminor
name meaning body part location / layer origin insertion nerve supply blood supply function
pectoralis major major chest muscle shoulder supericial
clavicular head: anterior surface of medial half of clavicle, sternocostal head: anterior surface of sternum, superior six costal cartilages, aponeurosis of the
external obliqe muscle
lateral lip of intertubercular groove of
humerus (long insertion)
lateral pectoral nerve
(lat. cord)
pectoral branch of thoracoacromial
trunk
adducts and medially rotates the humerus
pectoralis minor minor chest muscle shoulderdeep to pectoralis major
3rd to 5th ribs near their costal cartilages
medial border and superior surface of coracoid process of
scapula
medial pectoral nerve
(post. cord)
pectoral branch of thoracoacromial
trunk
stabilises scapula by drawing it against the
thoracic wall, horizontal adduction of
shoulder
serratus anteriormuscle that's notched like the edge of a saw
shoulder outer surface of upper 8 or 9 ribs (or more)
costal aspect of medial margin of scapula
long thoracic nerve
lateral thoracic artery,
thoracodorsal artery
protracts (=anterior movement of arms at shoulder) and stabilises
scapula
biceps brachii biceps of the arm arm anterior, superficial
long head: supraglenoid tubercle of scapula (through sleeve of synovial tissue in
intertubercular /bicipital groove of humerus, short head: coracoid process, joins long head midway down arm
via common tendon into the bicipical tuberosity of radius. Medial side:
via bicipital aponeurosis into deep fascia of medial forearm and subcutaneous border of ulna
musculocutaneous brachial artery
supinator of forearm when elbow is flexed, flexes elbow in fully supinated position.
Shoulder: stabilises and minor flexion
coracobrachialis muscle of the arm and coracoid process arm anterior,
deep
tip of coracoid process of scapula (with short head of biceps)
medial aspect midshaft of humerus musculocutaneous brachial artery
adducts shoulder (to hold things under arm), weak flexor of shoulder