Extremities
Muscles/I&O/Bones/Vessels/Nerves 2025
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Deltoid (Origin) - 🧠ANSWER ✔✔Lateral one third of clavicle, acromion &
spine of scapula
Trapezius (Origin) - 🧠ANSWER ✔✔External occipital protuberance, medial
portion of superior nuchae line of the occiput , ligamentum nuchae &
spinous process of C-7 through T-12
Latissimus Dorsi (Origin) - 🧠ANSWER ✔✔Inferior angle of scapula, spinous
processes of the last 6 thoracic vertebrae, last 3-4 ribs, thoracolumbar
aponeurosis and posterior iliac crest
,Teres Major (Origin) - 🧠ANSWER ✔✔Inferior angle and lower 1/3 of lateral
border of scapula
Supraspinatus (Origin) - 🧠ANSWER ✔✔Supraspinous fossa of scapula
Infraspinatus (Origin) - 🧠ANSWER ✔✔Infraspinous fossa of scapula
Teres minor (Origin) - 🧠ANSWER ✔✔Upper 2/3 of lateral border of the
scapula
Subscapularis (Origin) - 🧠ANSWER ✔✔Subscapular fossa of scapula
Pectoralis Minor (Origin) - 🧠ANSWER ✔✔3rd, 4th, 5th ribs
Levator Scapula (Origin) - 🧠ANSWER ✔✔Transverse Process C-1 to C-4
Biceps Brachii (Origin) - 🧠ANSWER ✔✔*Short Head*: Coracoid process of
the scapula
*Long Head*: Supraglenoid tubercle of the scapula
Serratus Anterior (Origin) - 🧠ANSWER ✔✔External Surface of the upper 8
or 9 ribs
Pectoralis Major (Origin) - 🧠ANSWER ✔✔Medial half of clavicle, sternum
and cartilage of 1st through 6th ribs
,Rhomboid Major (Origin) - 🧠ANSWER ✔✔Spinous Process T-2 to T-5
Subclavius (Origin) - 🧠ANSWER ✔✔1st rib and cartilage
Rhomboid Minor (Origin) - 🧠ANSWER ✔✔Spinous Process C-7 to T-1
Triceps Brachii (Origin) - 🧠ANSWER ✔✔*Long Head*: Infraglenoid tubercle
of the scapula
*Lateral Head*: Posterior surface of proximal half of humerus
*Medial Head*: Posterior surface of distal half of humerus
Coracobrachialis (Origin) - 🧠ANSWER ✔✔Coracoid process of the scapula
Deltoid (Insertion) - 🧠ANSWER ✔✔Deltoid Tuberosity
Trapezius (Insertion) - 🧠ANSWER ✔✔Lateral 1/3 of clavicle, acromion,
spine of the scapula
Latissimus Dorsi (Insertion) - 🧠ANSWER ✔✔Intertubercular groove of the
humerus
Teres Major (Insertion) - 🧠ANSWER ✔✔Crest of lesser tubercle of the
humerus
Supraspinatus (Insertion) - 🧠ANSWER ✔✔Greater tubercle of the humerus
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STATEMENT. ALL RIGHTS RESERVED
, Infraspinatus (Insertion) - 🧠ANSWER ✔✔Greater tubercle of the humerus
Teres Minor (Insertion) - 🧠ANSWER ✔✔Greater tubercle of the humerus
Subscapularis (Insertion) - 🧠ANSWER ✔✔Lesser tubercle of the humerus
Rhomboid Major (Insertion) - 🧠ANSWER ✔✔Medial border of scapula
between the spine of the scapula and inferior angle
Rhomboid Minor (Insertion) - 🧠ANSWER ✔✔Upper portion of medial border
of the scapula, at the level of the spine of the scapula
Levator Scapula (Insertion) - 🧠ANSWER ✔✔Medial border of the scapula,
between the superior angle and superior portion of the spine of the scapula
Serratus Anterior (Insertion) - 🧠ANSWER ✔✔Anterior surface of medial
border of the scapula
Pectoralis Major (Insertion) - 🧠ANSWER ✔✔Crest of greater tubercle of the
humerus
Pectoralis Minor (Insertion) - 🧠ANSWER ✔✔Medial surface of the coracoid
process of the scapula